/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_1011b.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 13:13:05,359 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 13:13:05,362 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 13:13:05,397 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-23 13:13:05,398 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-23 13:13:05,399 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-23 13:13:05,401 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-23 13:13:05,403 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-23 13:13:05,406 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-23 13:13:05,407 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-23 13:13:05,408 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-23 13:13:05,410 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-23 13:13:05,411 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 13:13:05,412 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 13:13:05,414 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 13:13:05,415 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 13:13:05,417 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 13:13:05,418 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 13:13:05,420 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 13:13:05,423 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 13:13:05,425 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 13:13:05,426 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 13:13:05,428 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 13:13:05,429 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 13:13:05,433 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 13:13:05,444 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 13:13:05,446 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 13:13:05,447 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 13:13:05,448 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 [2021-02-23 13:13:05,477 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 13:13:05,477 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 13:13:05,479 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-23 13:13:05,479 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-23 13:13:05,480 INFO L138 SettingsManager]: * Use SBE=true [2021-02-23 13:13:05,480 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 13:13:05,480 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 13:13:05,480 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 13:13:05,481 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 13:13:05,481 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 13:13:05,481 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 13:13:05,481 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 13:13:05,482 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 13:13:05,482 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 13:13:05,482 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 13:13:05,482 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 13:13:05,482 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 13:13:05,483 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 13:13:05,483 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-23 13:13:05,483 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 13:13:05,483 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 13:13:05,484 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 13:13:05,484 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-23 13:13:05,484 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-23 13:13:05,484 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-23 13:13:05,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-23 13:13:05,485 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 13:13:05,485 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-23 13:13:05,485 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 13:13:05,950 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 13:13:05,978 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 13:13:05,983 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 13:13:05,984 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 13:13:05,985 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 13:13:05,986 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1011b.c [2021-02-23 13:13:06,083 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f000b8290/b9a0f8ba05e4423c95212e6b8598e1ac/FLAG82b0c00ae [2021-02-23 13:13:06,696 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 13:13:06,696 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1011b.c [2021-02-23 13:13:06,703 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f000b8290/b9a0f8ba05e4423c95212e6b8598e1ac/FLAG82b0c00ae [2021-02-23 13:13:07,067 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f000b8290/b9a0f8ba05e4423c95212e6b8598e1ac [2021-02-23 13:13:07,073 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 13:13:07,090 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 13:13:07,094 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 13:13:07,094 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 13:13:07,098 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 13:13:07,100 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 01:13:07" (1/1) ... [2021-02-23 13:13:07,102 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d8ce6ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:13:07, skipping insertion in model container [2021-02-23 13:13:07,102 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 01:13:07" (1/1) ... [2021-02-23 13:13:07,111 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 13:13:07,128 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 13:13:07,299 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_1011b.c[1146,1159] [2021-02-23 13:13:07,303 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 13:13:07,314 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 13:13:07,337 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_1011b.c[1146,1159] [2021-02-23 13:13:07,338 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 13:13:07,357 INFO L208 MainTranslator]: Completed translation [2021-02-23 13:13:07,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:13:07 WrapperNode [2021-02-23 13:13:07,358 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 13:13:07,359 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 13:13:07,359 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 13:13:07,359 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 13:13:07,373 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:13:07" (1/1) ... [2021-02-23 13:13:07,374 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:13:07" (1/1) ... [2021-02-23 13:13:07,383 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:13:07" (1/1) ... [2021-02-23 13:13:07,384 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:13:07" (1/1) ... [2021-02-23 13:13:07,394 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:13:07" (1/1) ... [2021-02-23 13:13:07,399 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:13:07" (1/1) ... [2021-02-23 13:13:07,401 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:13:07" (1/1) ... [2021-02-23 13:13:07,404 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 13:13:07,405 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 13:13:07,405 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 13:13:07,405 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 13:13:07,406 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:13:07" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 13:13:07,531 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 13:13:07,531 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 13:13:07,532 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 13:13:07,532 INFO L138 BoogieDeclarations]: Found implementation of procedure fabs_float [2021-02-23 13:13:07,532 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2021-02-23 13:13:07,533 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 13:13:07,534 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 13:13:07,534 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 13:13:07,534 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 13:13:07,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 13:13:07,536 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2021-02-23 13:13:07,536 INFO L130 BoogieDeclarations]: Found specification of procedure fabs_float [2021-02-23 13:13:07,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-02-23 13:13:07,538 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 13:13:07,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 13:13:07,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 13:13:07,540 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-02-23 13:13:07,540 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2021-02-23 13:13:07,540 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 13:13:07,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 13:13:07,541 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 13:13:07,541 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 13:13:08,033 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 13:13:08,033 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-02-23 13:13:08,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 01:13:08 BoogieIcfgContainer [2021-02-23 13:13:08,035 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 13:13:08,037 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 13:13:08,037 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 13:13:08,041 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 13:13:08,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 01:13:07" (1/3) ... [2021-02-23 13:13:08,042 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50019165 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 01:13:08, skipping insertion in model container [2021-02-23 13:13:08,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:13:07" (2/3) ... [2021-02-23 13:13:08,043 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50019165 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 01:13:08, skipping insertion in model container [2021-02-23 13:13:08,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 01:13:08" (3/3) ... [2021-02-23 13:13:08,074 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1011b.c [2021-02-23 13:13:08,092 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-23 13:13:08,111 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 13:13:08,150 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 13:13:08,180 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 13:13:08,180 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 13:13:08,180 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-23 13:13:08,181 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 13:13:08,181 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 13:13:08,181 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 13:13:08,181 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 13:13:08,181 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 13:13:08,201 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2021-02-23 13:13:08,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-23 13:13:08,209 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:13:08,210 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:13:08,210 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:13:08,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:13:08,218 INFO L82 PathProgramCache]: Analyzing trace with hash -935719056, now seen corresponding path program 1 times [2021-02-23 13:13:08,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:13:08,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958838765] [2021-02-23 13:13:08,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:13:08,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:13:08,425 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:13:08,428 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:13:08,430 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:13:08,431 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:13:08,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:13:08,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:13:08,601 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:13:08,605 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:13:08,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-02-23 13:13:08,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:13:08,666 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:13:08,667 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:13:08,669 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:13:08,670 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:13:08,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:13:08,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958838765] [2021-02-23 13:13:08,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:13:08,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:13:08,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829003161] [2021-02-23 13:13:08,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:13:08,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:13:08,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:13:08,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:13:08,703 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 4 states. [2021-02-23 13:13:08,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:13:08,951 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2021-02-23 13:13:08,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-23 13:13:08,953 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2021-02-23 13:13:08,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:13:08,962 INFO L225 Difference]: With dead ends: 56 [2021-02-23 13:13:08,963 INFO L226 Difference]: Without dead ends: 28 [2021-02-23 13:13:08,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 13:13:08,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-02-23 13:13:09,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-02-23 13:13:09,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-02-23 13:13:09,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2021-02-23 13:13:09,016 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 17 [2021-02-23 13:13:09,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:13:09,017 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2021-02-23 13:13:09,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:13:09,017 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2021-02-23 13:13:09,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-23 13:13:09,018 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:13:09,018 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:13:09,019 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 13:13:09,019 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:13:09,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:13:09,020 INFO L82 PathProgramCache]: Analyzing trace with hash -2087877165, now seen corresponding path program 1 times [2021-02-23 13:13:09,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:13:09,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964434310] [2021-02-23 13:13:09,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:13:09,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 13:13:09,086 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 13:13:09,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 13:13:09,145 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 13:13:09,178 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-02-23 13:13:09,179 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 13:13:09,180 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 13:13:09,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 01:13:09 BoogieIcfgContainer [2021-02-23 13:13:09,216 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 13:13:09,218 INFO L168 Benchmark]: Toolchain (without parser) took 2142.08 ms. Allocated memory is still 154.1 MB. Free memory was 130.1 MB in the beginning and 92.6 MB in the end (delta: 37.6 MB). Peak memory consumption was 37.5 MB. Max. memory is 8.0 GB. [2021-02-23 13:13:09,219 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 154.1 MB. Free memory is still 132.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 13:13:09,220 INFO L168 Benchmark]: CACSL2BoogieTranslator took 264.29 ms. Allocated memory is still 154.1 MB. Free memory was 129.0 MB in the beginning and 118.7 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-23 13:13:09,221 INFO L168 Benchmark]: Boogie Preprocessor took 45.03 ms. Allocated memory is still 154.1 MB. Free memory was 118.5 MB in the beginning and 117.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-23 13:13:09,222 INFO L168 Benchmark]: RCFGBuilder took 630.79 ms. Allocated memory is still 154.1 MB. Free memory was 116.8 MB in the beginning and 100.3 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-02-23 13:13:09,223 INFO L168 Benchmark]: TraceAbstraction took 1178.83 ms. Allocated memory is still 154.1 MB. Free memory was 99.9 MB in the beginning and 92.6 MB in the end (delta: 7.3 MB). Peak memory consumption was 7.1 MB. Max. memory is 8.0 GB. [2021-02-23 13:13:09,227 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 154.1 MB. Free memory is still 132.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 264.29 ms. Allocated memory is still 154.1 MB. Free memory was 129.0 MB in the beginning and 118.7 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 45.03 ms. Allocated memory is still 154.1 MB. Free memory was 118.5 MB in the beginning and 117.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 630.79 ms. Allocated memory is still 154.1 MB. Free memory was 116.8 MB in the beginning and 100.3 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1178.83 ms. Allocated memory is still 154.1 MB. Free memory was 99.9 MB in the beginning and 92.6 MB in the end (delta: 7.3 MB). Peak memory consumption was 7.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 52]: 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 51, overapproximation of someUnaryFLOAToperation at line 47, overapproximation of bitwiseAnd at line 23. Possible FailurePath: [L47] float x = -0.0f; [L48] CALL, EXPR fabs_float(x) VAL [\old(x)=55] [L15] __uint32_t ix; VAL [\old(x)=55, x=55] [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 sf_u; [L23] sf_u.word = (ix & 0x7fffffff) [L24] EXPR sf_u.value [L24] (x) = sf_u.value [L26] return x; VAL [\old(x)=55, \result=50, ix=56, x=50] [L48] RET, EXPR fabs_float(x) VAL [fabs_float(x)=50, x=55] [L48] float res = fabs_float(x); [L51] EXPR res == 0.0f && __signbit_float(res) == 0 VAL [res=50, res == 0.0f && __signbit_float(res) == 0=0, x=55] [L51] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L52] reach_error() VAL [res=50, x=55] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.0s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 29 SDtfs, 6 SDslu, 24 SDs, 0 SdLazy, 29 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 36 NumberOfCodeBlocks, 36 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 16 ConstructedInterpolants, 0 QuantifiedInterpolants, 928 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...