/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 --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1381.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 22:36:29,801 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 22:36:29,803 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 22:36:29,842 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 22:36:29,855 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 22:36:29,857 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 22:36:29,858 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 22:36:29,860 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 22:36:29,875 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 22:36:29,877 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 22:36:29,880 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 22:36:29,883 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 22:36:29,890 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 22:36:29,892 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 22:36:29,894 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 22:36:29,895 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 22:36:29,904 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 22:36:29,927 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 22:36:29,950 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 22:36:29,950 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 22:36:29,955 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 22:36:29,955 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 22:36:29,955 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 22:36:29,955 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 22:36:29,955 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 22:36:29,956 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 22:36:29,956 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 22:36:29,956 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 22:36:29,957 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 22:36:29,957 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 22:36:29,957 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 22:36:29,958 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 22:36:29,958 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 22:36:29,958 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 22:36:29,958 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 22:36:29,958 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 22:36:29,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 22:36:29,959 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 22:36:29,959 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 22:36:29,959 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 22:36:29,959 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-23 22:36:30,377 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 22:36:30,403 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 22:36:30,406 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 22:36:30,407 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 22:36:30,408 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 22:36:30,409 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1381.c [2021-02-23 22:36:30,482 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa56bcaac/aa067ae875214529acca4e00bf64145e/FLAGa80d7253e [2021-02-23 22:36:31,111 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 22:36:31,112 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1381.c [2021-02-23 22:36:31,119 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa56bcaac/aa067ae875214529acca4e00bf64145e/FLAGa80d7253e [2021-02-23 22:36:31,487 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa56bcaac/aa067ae875214529acca4e00bf64145e [2021-02-23 22:36:31,492 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 22:36:31,508 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 22:36:31,513 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 22:36:31,513 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 22:36:31,517 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 22:36:31,518 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 10:36:31" (1/1) ... [2021-02-23 22:36:31,520 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24b9faef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:36:31, skipping insertion in model container [2021-02-23 22:36:31,521 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 10:36:31" (1/1) ... [2021-02-23 22:36:31,531 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 22:36:31,563 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 22:36:31,809 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1381.c[1242,1255] [2021-02-23 22:36:31,817 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 22:36:31,825 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 22:36:31,859 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1381.c[1242,1255] [2021-02-23 22:36:31,860 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 22:36:31,881 INFO L208 MainTranslator]: Completed translation [2021-02-23 22:36:31,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:36:31 WrapperNode [2021-02-23 22:36:31,882 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 22:36:31,883 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 22:36:31,884 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 22:36:31,884 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 22:36:31,900 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:36:31" (1/1) ... [2021-02-23 22:36:31,901 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:36:31" (1/1) ... [2021-02-23 22:36:31,913 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:36:31" (1/1) ... [2021-02-23 22:36:31,913 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:36:31" (1/1) ... [2021-02-23 22:36:31,935 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:36:31" (1/1) ... [2021-02-23 22:36:31,941 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:36:31" (1/1) ... [2021-02-23 22:36:31,949 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:36:31" (1/1) ... [2021-02-23 22:36:31,954 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 22:36:31,958 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 22:36:31,958 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 22:36:31,958 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 22:36:31,959 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:36:31" (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 22:36:32,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 22:36:32,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 22:36:32,057 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 22:36:32,057 INFO L138 BoogieDeclarations]: Found implementation of procedure copysign_float [2021-02-23 22:36:32,058 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2021-02-23 22:36:32,058 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 22:36:32,058 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 22:36:32,058 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 22:36:32,058 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 22:36:32,059 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 22:36:32,059 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2021-02-23 22:36:32,059 INFO L130 BoogieDeclarations]: Found specification of procedure copysign_float [2021-02-23 22:36:32,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-02-23 22:36:32,059 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 22:36:32,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 22:36:32,060 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 22:36:32,060 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-02-23 22:36:32,060 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2021-02-23 22:36:32,060 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 22:36:32,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 22:36:32,061 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 22:36:32,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 22:36:32,403 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 22:36:32,404 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-02-23 22:36:32,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:36:32 BoogieIcfgContainer [2021-02-23 22:36:32,406 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 22:36:32,407 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 22:36:32,408 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 22:36:32,411 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 22:36:32,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 10:36:31" (1/3) ... [2021-02-23 22:36:32,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f9156bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 10:36:32, skipping insertion in model container [2021-02-23 22:36:32,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:36:31" (2/3) ... [2021-02-23 22:36:32,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f9156bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 10:36:32, skipping insertion in model container [2021-02-23 22:36:32,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:36:32" (3/3) ... [2021-02-23 22:36:32,414 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1381.c [2021-02-23 22:36:32,421 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 22:36:32,428 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 22:36:32,470 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 22:36:32,503 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 22:36:32,503 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 22:36:32,503 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-23 22:36:32,503 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 22:36:32,503 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 22:36:32,504 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 22:36:32,504 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 22:36:32,504 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 22:36:32,521 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states. [2021-02-23 22:36:32,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-23 22:36:32,532 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:36:32,532 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:36:32,533 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:36:32,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:36:32,539 INFO L82 PathProgramCache]: Analyzing trace with hash -2004470524, now seen corresponding path program 1 times [2021-02-23 22:36:32,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:36:32,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598541973] [2021-02-23 22:36:32,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:36:32,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:32,775 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:32,777 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:32,778 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:32,779 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:32,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:36:32,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:32,841 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:32,842 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:32,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-02-23 22:36:32,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:32,870 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:32,870 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:32,871 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:32,872 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:32,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-23 22:36:32,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:36:32,883 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:36:32,884 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:36:32,894 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 22:36:32,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1598541973] [2021-02-23 22:36:32,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 22:36:32,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 22:36:32,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093062920] [2021-02-23 22:36:32,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 22:36:32,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:36:32,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 22:36:32,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 22:36:32,928 INFO L87 Difference]: Start difference. First operand 66 states. Second operand 4 states. [2021-02-23 22:36:33,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:36:33,129 INFO L93 Difference]: Finished difference Result 111 states and 123 transitions. [2021-02-23 22:36:33,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 22:36:33,131 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2021-02-23 22:36:33,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:36:33,140 INFO L225 Difference]: With dead ends: 111 [2021-02-23 22:36:33,141 INFO L226 Difference]: Without dead ends: 59 [2021-02-23 22:36:33,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 22:36:33,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-02-23 22:36:33,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-02-23 22:36:33,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-02-23 22:36:33,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 58 transitions. [2021-02-23 22:36:33,196 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 58 transitions. Word has length 37 [2021-02-23 22:36:33,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:36:33,197 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 58 transitions. [2021-02-23 22:36:33,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 22:36:33,197 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 58 transitions. [2021-02-23 22:36:33,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-02-23 22:36:33,200 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:36:33,200 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:36:33,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 22:36:33,201 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:36:33,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:36:33,202 INFO L82 PathProgramCache]: Analyzing trace with hash 264402084, now seen corresponding path program 1 times [2021-02-23 22:36:33,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:36:33,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011580228] [2021-02-23 22:36:33,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:36:33,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 22:36:33,262 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 22:36:33,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 22:36:33,321 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 22:36:33,385 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-23 22:36:33,385 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 22:36:33,389 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 22:36:33,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 10:36:33 BoogieIcfgContainer [2021-02-23 22:36:33,470 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 22:36:33,472 INFO L168 Benchmark]: Toolchain (without parser) took 1976.26 ms. Allocated memory is still 168.8 MB. Free memory was 146.0 MB in the beginning and 88.9 MB in the end (delta: 57.1 MB). Peak memory consumption was 57.5 MB. Max. memory is 8.0 GB. [2021-02-23 22:36:33,473 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 168.8 MB. Free memory is still 142.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 22:36:33,474 INFO L168 Benchmark]: CACSL2BoogieTranslator took 369.85 ms. Allocated memory is still 168.8 MB. Free memory was 144.7 MB in the beginning and 134.9 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-23 22:36:33,475 INFO L168 Benchmark]: Boogie Preprocessor took 70.76 ms. Allocated memory is still 168.8 MB. Free memory was 134.9 MB in the beginning and 133.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-23 22:36:33,475 INFO L168 Benchmark]: RCFGBuilder took 447.87 ms. Allocated memory is still 168.8 MB. Free memory was 133.2 MB in the beginning and 149.2 MB in the end (delta: -16.0 MB). Peak memory consumption was 20.8 MB. Max. memory is 8.0 GB. [2021-02-23 22:36:33,476 INFO L168 Benchmark]: TraceAbstraction took 1062.86 ms. Allocated memory is still 168.8 MB. Free memory was 148.7 MB in the beginning and 88.9 MB in the end (delta: 59.8 MB). Peak memory consumption was 59.8 MB. Max. memory is 8.0 GB. [2021-02-23 22:36:33,480 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 168.8 MB. Free memory is still 142.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 369.85 ms. Allocated memory is still 168.8 MB. Free memory was 144.7 MB in the beginning and 134.9 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 70.76 ms. Allocated memory is still 168.8 MB. Free memory was 134.9 MB in the beginning and 133.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 447.87 ms. Allocated memory is still 168.8 MB. Free memory was 133.2 MB in the beginning and 149.2 MB in the end (delta: -16.0 MB). Peak memory consumption was 20.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1062.86 ms. Allocated memory is still 168.8 MB. Free memory was 148.7 MB in the beginning and 88.9 MB in the end (delta: 59.8 MB). Peak memory consumption was 59.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 51]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 35, overapproximation of bitwiseOr at line 28, overapproximation of someBinaryArithmeticFLOAToperation at line 45. Possible FailurePath: [L45] float x = 0.0f / 0.0f; [L46] float y = __VERIFIER_nondet_float(); VAL [__VERIFIER_nondet_float()=62, y=62] [L47] CALL, EXPR copysign_float(x, y) VAL [\old(x)=52, \old(y)=62] [L15] __uint32_t ix, iy; VAL [\old(x)=52, \old(y)=62, x=52, y=62] [L17] ieee_float_shape_type gf_u; VAL [\old(x)=52, \old(y)=62, gf_u={8:0}, x=52, y=62] [L18] gf_u.value = (x) VAL [\old(x)=52, \old(y)=62, gf_u={8:0}, x=52, y=62] [L19] EXPR gf_u.word VAL [\old(x)=52, \old(y)=62, gf_u={8:0}, gf_u.word=57, x=52, y=62] [L19] (ix) = gf_u.word VAL [\old(x)=52, \old(y)=62, gf_u={8:0}, gf_u.word=57, ix=57, x=52, y=62] [L22] ieee_float_shape_type gf_u; VAL [\old(x)=52, \old(y)=62, gf_u={9:0}, ix=57, x=52, y=62] [L23] gf_u.value = (y) VAL [\old(x)=52, \old(y)=62, gf_u={9:0}, ix=57, x=52, y=62] [L24] EXPR gf_u.word VAL [\old(x)=52, \old(y)=62, gf_u={9:0}, gf_u.word=49, ix=57, x=52, y=62] [L24] (iy) = gf_u.word VAL [\old(x)=52, \old(y)=62, gf_u={9:0}, gf_u.word=49, ix=57, iy=49, x=52, y=62] [L27] ieee_float_shape_type sf_u; VAL [\old(x)=52, \old(y)=62, ix=57, iy=49, sf_u={3:0}, x=52, y=62] [L28] sf_u.word = ((ix & 0x7fffffff) | (iy & 0x80000000)) VAL [\old(x)=52, \old(y)=62, ix=57, iy=49, sf_u={3:0}, x=52, y=62] [L29] EXPR sf_u.value VAL [\old(x)=52, \old(y)=62, ix=57, iy=49, sf_u={3:0}, sf_u.value=61, x=52, y=62] [L29] (x) = sf_u.value VAL [\old(x)=52, \old(y)=62, ix=57, iy=49, sf_u={3:0}, sf_u.value=61, x=61, y=62] [L31] return x; VAL [\old(x)=52, \old(y)=62, \result=61, ix=57, iy=49, x=61, y=62] [L47] RET, EXPR copysign_float(x, y) VAL [copysign_float(x, y)=61, x=52, y=62] [L47] float res = copysign_float(x, y); VAL [copysign_float(x, y)=61, res=61, x=52, y=62] [L50] CALL, EXPR isnan_float(res) VAL [\old(x)=61] [L35] return x != x; VAL [\old(x)=61, \result=0, x=61] [L50] RET, EXPR isnan_float(res) VAL [isnan_float(res)=0, res=61, x=52, y=62] [L50] COND TRUE !isnan_float(res) VAL [isnan_float(res)=0, res=61, x=52, y=62] [L51] reach_error() VAL [res=61, x=52, y=62] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 69 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 62 SDtfs, 21 SDslu, 32 SDs, 0 SdLazy, 69 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=66occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 95 NumberOfCodeBlocks, 95 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 2808 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...