/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_1011a.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 13:13:05,136 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 13:13:05,140 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 13:13:05,201 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 13:13:05,250 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 13:13:05,253 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 13:13:05,254 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 13:13:05,259 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 13:13:05,260 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 13:13:05,261 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 13:13:05,263 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 13:13:05,278 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 13:13:05,283 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 13:13:05,285 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 13:13:05,286 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 13:13:05,287 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 13:13:05,290 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 13:13:05,299 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 13:13:05,299 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 13:13:05,300 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 13:13:05,301 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 13:13:05,328 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 13:13:05,328 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 13:13:05,330 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-23 13:13:05,330 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-23 13:13:05,330 INFO L138 SettingsManager]: * Use SBE=true [2021-02-23 13:13:05,330 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 13:13:05,330 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 13:13:05,331 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 13:13:05,331 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 13:13:05,331 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 13:13:05,331 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 13:13:05,331 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 13:13:05,332 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 13:13:05,332 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 13:13:05,332 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 13:13:05,332 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 13:13:05,333 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 13:13:05,333 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 13:13:05,333 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-23 13:13:05,333 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 13:13:05,333 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 13:13:05,334 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 13:13:05,334 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-23 13:13:05,334 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-23 13:13:05,334 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-23 13:13:05,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-23 13:13:05,335 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 13:13:05,335 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-23 13:13:05,335 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 13:13:05,737 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 13:13:05,778 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 13:13:05,781 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 13:13:05,782 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 13:13:05,783 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 13:13:05,784 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1011a.c [2021-02-23 13:13:05,872 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8de3c5f07/99843ca5aef64194a552ca646d3e9a22/FLAGa9a725d68 [2021-02-23 13:13:06,400 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 13:13:06,400 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1011a.c [2021-02-23 13:13:06,407 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8de3c5f07/99843ca5aef64194a552ca646d3e9a22/FLAGa9a725d68 [2021-02-23 13:13:06,767 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8de3c5f07/99843ca5aef64194a552ca646d3e9a22 [2021-02-23 13:13:06,777 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 13:13:06,793 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 13:13:06,796 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 13:13:06,796 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 13:13:06,801 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 13:13:06,802 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 01:13:06" (1/1) ... [2021-02-23 13:13:06,804 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5900214 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:13:06, skipping insertion in model container [2021-02-23 13:13:06,804 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 01:13:06" (1/1) ... [2021-02-23 13:13:06,813 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 13:13:06,833 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 13:13:07,067 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_1011a.c[1145,1158] [2021-02-23 13:13:07,070 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 13:13:07,081 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 13:13:07,104 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_1011a.c[1145,1158] [2021-02-23 13:13:07,105 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 13:13:07,123 INFO L208 MainTranslator]: Completed translation [2021-02-23 13:13:07,123 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:13:07 WrapperNode [2021-02-23 13:13:07,123 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 13:13:07,125 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 13:13:07,125 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 13:13:07,125 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 13:13:07,139 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 13:13:07,139 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 13:13:07,149 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 13:13:07,149 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 13:13:07,159 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 13:13:07,164 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 13:13:07,166 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 13:13:07,168 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 13:13:07,169 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 13:13:07,169 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 13:13:07,170 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 13:13:07,193 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 13:13:07,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 13:13:07,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 13:13:07,328 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 13:13:07,328 INFO L138 BoogieDeclarations]: Found implementation of procedure fabs_float [2021-02-23 13:13:07,328 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2021-02-23 13:13:07,328 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 13:13:07,328 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 13:13:07,329 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 13:13:07,329 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 13:13:07,329 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 13:13:07,329 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2021-02-23 13:13:07,329 INFO L130 BoogieDeclarations]: Found specification of procedure fabs_float [2021-02-23 13:13:07,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-02-23 13:13:07,330 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 13:13:07,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 13:13:07,330 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 13:13:07,330 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-02-23 13:13:07,330 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2021-02-23 13:13:07,330 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 13:13:07,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 13:13:07,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 13:13:07,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 13:13:07,851 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 13:13:07,852 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-02-23 13:13:07,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 01:13:07 BoogieIcfgContainer [2021-02-23 13:13:07,856 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 13:13:07,859 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 13:13:07,859 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 13:13:07,864 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 13:13:07,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 01:13:06" (1/3) ... [2021-02-23 13:13:07,865 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d3cc8b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 01:13:07, skipping insertion in model container [2021-02-23 13:13:07,865 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 13:13:07,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d3cc8b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 01:13:07, skipping insertion in model container [2021-02-23 13:13:07,866 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 01:13:07" (3/3) ... [2021-02-23 13:13:07,869 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1011a.c [2021-02-23 13:13:07,880 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-23 13:13:07,887 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 13:13:07,907 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 13:13:07,947 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 13:13:07,948 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 13:13:07,948 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-23 13:13:07,948 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 13:13:07,948 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 13:13:07,948 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 13:13:07,948 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 13:13:07,949 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 13:13:07,969 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2021-02-23 13:13:07,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-23 13:13:07,976 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:13:07,977 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 13:13:07,977 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:13:07,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:13:07,989 INFO L82 PathProgramCache]: Analyzing trace with hash -935719056, now seen corresponding path program 1 times [2021-02-23 13:13:08,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:13:08,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432888937] [2021-02-23 13:13:08,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:13:08,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:13:08,190 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:13:08,192 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:13:08,193 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:13:08,194 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:13:08,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:13:08,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:13:08,284 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:13:08,285 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:13:08,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-02-23 13:13:08,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:13:08,319 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:13:08,320 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:13:08,322 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:13:08,323 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:13:08,327 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 13:13:08,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432888937] [2021-02-23 13:13:08,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:13:08,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 13:13:08,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454758922] [2021-02-23 13:13:08,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 13:13:08,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:13:08,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 13:13:08,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 13:13:08,353 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 4 states. [2021-02-23 13:13:08,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:13:08,539 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2021-02-23 13:13:08,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-23 13:13:08,541 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2021-02-23 13:13:08,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:13:08,549 INFO L225 Difference]: With dead ends: 56 [2021-02-23 13:13:08,550 INFO L226 Difference]: Without dead ends: 28 [2021-02-23 13:13:08,553 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 [2021-02-23 13:13:08,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-02-23 13:13:08,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-02-23 13:13:08,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-02-23 13:13:08,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2021-02-23 13:13:08,606 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 17 [2021-02-23 13:13:08,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:13:08,607 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2021-02-23 13:13:08,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 13:13:08,607 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2021-02-23 13:13:08,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-23 13:13:08,608 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:13:08,608 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 13:13:08,609 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 13:13:08,609 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:13:08,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:13:08,610 INFO L82 PathProgramCache]: Analyzing trace with hash -2087877165, now seen corresponding path program 1 times [2021-02-23 13:13:08,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:13:08,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213391905] [2021-02-23 13:13:08,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:13:08,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 13:13:08,654 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 13:13:08,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 13:13:08,688 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 13:13:08,734 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-02-23 13:13:08,734 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 13:13:08,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 13:13:08,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 01:13:08 BoogieIcfgContainer [2021-02-23 13:13:08,786 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 13:13:08,789 INFO L168 Benchmark]: Toolchain (without parser) took 2009.39 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 106.1 MB in the beginning and 155.7 MB in the end (delta: -49.7 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 13:13:08,791 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 122.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 13:13:08,793 INFO L168 Benchmark]: CACSL2BoogieTranslator took 327.71 ms. Allocated memory is still 151.0 MB. Free memory was 104.8 MB in the beginning and 126.3 MB in the end (delta: -21.5 MB). Peak memory consumption was 6.6 MB. Max. memory is 8.0 GB. [2021-02-23 13:13:08,796 INFO L168 Benchmark]: Boogie Preprocessor took 43.74 ms. Allocated memory is still 151.0 MB. Free memory was 126.3 MB in the beginning and 124.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-23 13:13:08,798 INFO L168 Benchmark]: RCFGBuilder took 687.11 ms. Allocated memory is still 151.0 MB. Free memory was 124.9 MB in the beginning and 118.3 MB in the end (delta: 6.5 MB). Peak memory consumption was 7.3 MB. Max. memory is 8.0 GB. [2021-02-23 13:13:08,799 INFO L168 Benchmark]: TraceAbstraction took 927.33 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 117.7 MB in the beginning and 155.7 MB in the end (delta: -38.0 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 13:13:08,809 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 122.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 327.71 ms. Allocated memory is still 151.0 MB. Free memory was 104.8 MB in the beginning and 126.3 MB in the end (delta: -21.5 MB). Peak memory consumption was 6.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 43.74 ms. Allocated memory is still 151.0 MB. Free memory was 126.3 MB in the beginning and 124.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 687.11 ms. Allocated memory is still 151.0 MB. Free memory was 124.9 MB in the beginning and 118.3 MB in the end (delta: 6.5 MB). Peak memory consumption was 7.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 927.33 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 117.7 MB in the beginning and 155.7 MB in the end (delta: -38.0 MB). There was no memory consumed. 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 bitwiseAnd at line 23. Possible FailurePath: [L47] float x = 0.0f; VAL [x=0] [L48] CALL, EXPR fabs_float(x) VAL [\old(x)=0] [L15] __uint32_t ix; VAL [\old(x)=0, x=0] [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)=0, \result=50, ix=55, x=50] [L48] RET, EXPR fabs_float(x) VAL [fabs_float(x)=50, x=0] [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=0] [L51] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L52] reach_error() VAL [res=50, x=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.7s, 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, 0.0s 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=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, 0.1s 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...