/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1211b.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 13:14:12,033 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 13:14:12,036 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 13:14:12,048 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 13:14:12,048 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 13:14:12,049 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 13:14:12,051 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 13:14:12,052 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 13:14:12,054 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 13:14:12,055 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 13:14:12,056 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 13:14:12,057 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 13:14:12,058 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 13:14:12,059 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 13:14:12,060 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 13:14:12,061 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 13:14:12,062 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 13:14:12,063 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 13:14:12,065 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 13:14:12,067 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 13:14:12,069 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 13:14:12,070 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 13:14:12,071 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 13:14:12,072 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 13:14:12,075 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-17 13:14:12,076 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-17 13:14:12,076 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-17 13:14:12,077 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-17 13:14:12,078 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-17 13:14:12,079 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-17 13:14:12,079 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-17 13:14:12,080 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-17 13:14:12,081 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-17 13:14:12,082 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-17 13:14:12,083 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-17 13:14:12,083 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-17 13:14:12,084 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-17 13:14:12,084 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-17 13:14:12,085 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 13:14:12,085 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 13:14:12,086 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 13:14:12,087 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-17 13:14:12,096 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 13:14:12,097 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 13:14:12,098 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 13:14:12,099 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 13:14:12,099 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 13:14:12,099 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 13:14:12,099 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 13:14:12,099 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 13:14:12,099 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 13:14:12,100 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 13:14:12,100 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 13:14:12,100 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 13:14:12,100 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 13:14:12,100 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 13:14:12,101 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 13:14:12,101 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-17 13:14:12,101 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 13:14:12,101 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 13:14:12,102 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 13:14:12,102 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 13:14:12,102 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-17 13:14:12,102 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 13:14:12,102 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-17 13:14:12,377 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 13:14:12,390 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 13:14:12,394 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 13:14:12,396 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 13:14:12,396 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 13:14:12,397 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1211b.c [2020-07-17 13:14:12,471 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0693faaad/b08856406c034758a80e396dfc393315/FLAG72368f332 [2020-07-17 13:14:12,871 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 13:14:12,872 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1211b.c [2020-07-17 13:14:12,879 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0693faaad/b08856406c034758a80e396dfc393315/FLAG72368f332 [2020-07-17 13:14:13,277 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0693faaad/b08856406c034758a80e396dfc393315 [2020-07-17 13:14:13,286 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 13:14:13,289 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 13:14:13,290 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 13:14:13,291 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 13:14:13,294 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 13:14:13,295 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 01:14:13" (1/1) ... [2020-07-17 13:14:13,298 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21247511 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:13, skipping insertion in model container [2020-07-17 13:14:13,298 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 01:14:13" (1/1) ... [2020-07-17 13:14:13,307 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 13:14:13,328 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 13:14:13,523 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 13:14:13,533 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 13:14:13,750 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 13:14:13,767 INFO L208 MainTranslator]: Completed translation [2020-07-17 13:14:13,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:13 WrapperNode [2020-07-17 13:14:13,768 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 13:14:13,769 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 13:14:13,769 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 13:14:13,769 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 13:14:13,786 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:13" (1/1) ... [2020-07-17 13:14:13,786 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:13" (1/1) ... [2020-07-17 13:14:13,813 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:13" (1/1) ... [2020-07-17 13:14:13,814 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:13" (1/1) ... [2020-07-17 13:14:13,846 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:13" (1/1) ... [2020-07-17 13:14:13,865 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:13" (1/1) ... [2020-07-17 13:14:13,869 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:13" (1/1) ... [2020-07-17 13:14:13,878 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 13:14:13,880 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 13:14:13,880 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 13:14:13,881 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 13:14:13,882 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:13" (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 [2020-07-17 13:14:13,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 13:14:13,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 13:14:13,969 INFO L138 BoogieDeclarations]: Found implementation of procedure modf_float [2020-07-17 13:14:13,969 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-07-17 13:14:13,969 INFO L138 BoogieDeclarations]: Found implementation of procedure isinf_float [2020-07-17 13:14:13,969 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 13:14:13,970 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 13:14:13,970 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-07-17 13:14:13,970 INFO L130 BoogieDeclarations]: Found specification of procedure modf_float [2020-07-17 13:14:13,970 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-17 13:14:13,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-07-17 13:14:13,971 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-17 13:14:13,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-17 13:14:13,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-17 13:14:13,971 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-07-17 13:14:13,971 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-07-17 13:14:13,972 INFO L130 BoogieDeclarations]: Found specification of procedure isinf_float [2020-07-17 13:14:13,972 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 13:14:13,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2020-07-17 13:14:13,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 13:14:13,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 13:14:14,563 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 13:14:14,563 INFO L295 CfgBuilder]: Removed 18 assume(true) statements. [2020-07-17 13:14:14,570 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 01:14:14 BoogieIcfgContainer [2020-07-17 13:14:14,570 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 13:14:14,572 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 13:14:14,572 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 13:14:14,576 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 13:14:14,576 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 01:14:13" (1/3) ... [2020-07-17 13:14:14,577 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c634e8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 01:14:14, skipping insertion in model container [2020-07-17 13:14:14,577 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:14:13" (2/3) ... [2020-07-17 13:14:14,578 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c634e8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 01:14:14, skipping insertion in model container [2020-07-17 13:14:14,578 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 01:14:14" (3/3) ... [2020-07-17 13:14:14,580 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1211b.c [2020-07-17 13:14:14,592 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-17 13:14:14,601 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 13:14:14,616 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 13:14:14,640 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 13:14:14,641 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 13:14:14,641 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-17 13:14:14,641 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 13:14:14,642 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 13:14:14,642 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 13:14:14,642 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 13:14:14,642 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 13:14:14,666 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states. [2020-07-17 13:14:14,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-07-17 13:14:14,682 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 13:14:14,683 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] [2020-07-17 13:14:14,684 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 13:14:14,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 13:14:14,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1432903932, now seen corresponding path program 1 times [2020-07-17 13:14:14,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 13:14:14,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [160635205] [2020-07-17 13:14:14,702 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 13:14:14,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:14:14,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:14:14,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:14:14,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:14:14,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 13:14:14,984 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 13:14:14,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [160635205] [2020-07-17 13:14:14,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 13:14:14,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 13:14:14,992 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057774548] [2020-07-17 13:14:14,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 13:14:14,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 13:14:15,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 13:14:15,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 13:14:15,016 INFO L87 Difference]: Start difference. First operand 168 states. Second operand 4 states. [2020-07-17 13:14:15,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 13:14:15,558 INFO L93 Difference]: Finished difference Result 315 states and 363 transitions. [2020-07-17 13:14:15,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-17 13:14:15,561 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-07-17 13:14:15,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 13:14:15,575 INFO L225 Difference]: With dead ends: 315 [2020-07-17 13:14:15,575 INFO L226 Difference]: Without dead ends: 153 [2020-07-17 13:14:15,581 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-17 13:14:15,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-07-17 13:14:15,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2020-07-17 13:14:15,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-07-17 13:14:15,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 157 transitions. [2020-07-17 13:14:15,665 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 157 transitions. Word has length 47 [2020-07-17 13:14:15,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 13:14:15,666 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 157 transitions. [2020-07-17 13:14:15,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 13:14:15,667 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 157 transitions. [2020-07-17 13:14:15,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-07-17 13:14:15,674 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 13:14:15,676 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 13:14:15,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 13:14:15,676 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 13:14:15,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 13:14:15,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1562102553, now seen corresponding path program 1 times [2020-07-17 13:14:15,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 13:14:15,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1886014149] [2020-07-17 13:14:15,678 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 13:14:15,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:14:15,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:14:15,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:14:15,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:14:15,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 13:14:15,996 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 13:14:15,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1886014149] [2020-07-17 13:14:15,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 13:14:15,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 13:14:15,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137019131] [2020-07-17 13:14:15,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 13:14:15,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 13:14:15,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 13:14:15,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 13:14:16,000 INFO L87 Difference]: Start difference. First operand 153 states and 157 transitions. Second operand 5 states. [2020-07-17 13:14:16,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 13:14:16,356 INFO L93 Difference]: Finished difference Result 161 states and 164 transitions. [2020-07-17 13:14:16,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 13:14:16,357 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-07-17 13:14:16,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 13:14:16,359 INFO L225 Difference]: With dead ends: 161 [2020-07-17 13:14:16,359 INFO L226 Difference]: Without dead ends: 153 [2020-07-17 13:14:16,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 13:14:16,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-07-17 13:14:16,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2020-07-17 13:14:16,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-07-17 13:14:16,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 156 transitions. [2020-07-17 13:14:16,380 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 156 transitions. Word has length 72 [2020-07-17 13:14:16,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 13:14:16,380 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 156 transitions. [2020-07-17 13:14:16,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 13:14:16,381 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 156 transitions. [2020-07-17 13:14:16,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-07-17 13:14:16,384 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 13:14:16,384 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 13:14:16,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 13:14:16,384 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 13:14:16,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 13:14:16,385 INFO L82 PathProgramCache]: Analyzing trace with hash 934667084, now seen corresponding path program 1 times [2020-07-17 13:14:16,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 13:14:16,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1775641132] [2020-07-17 13:14:16,386 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 13:14:16,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 13:14:16,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 13:14:16,607 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 13:14:16,607 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-17 13:14:16,608 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-17 13:14:16,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-17 13:14:16,631 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 01:14:16 BoogieIcfgContainer [2020-07-17 13:14:16,631 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 13:14:16,634 INFO L168 Benchmark]: Toolchain (without parser) took 3345.87 ms. Allocated memory was 136.8 MB in the beginning and 234.4 MB in the end (delta: 97.5 MB). Free memory was 100.6 MB in the beginning and 103.7 MB in the end (delta: -3.1 MB). Peak memory consumption was 94.4 MB. Max. memory is 7.1 GB. [2020-07-17 13:14:16,636 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 136.8 MB. Free memory was 119.0 MB in the beginning and 118.8 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-17 13:14:16,637 INFO L168 Benchmark]: CACSL2BoogieTranslator took 478.07 ms. Allocated memory was 136.8 MB in the beginning and 205.0 MB in the end (delta: 68.2 MB). Free memory was 100.2 MB in the beginning and 182.3 MB in the end (delta: -82.1 MB). Peak memory consumption was 24.6 MB. Max. memory is 7.1 GB. [2020-07-17 13:14:16,638 INFO L168 Benchmark]: Boogie Preprocessor took 109.09 ms. Allocated memory is still 205.0 MB. Free memory was 182.3 MB in the beginning and 180.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-07-17 13:14:16,639 INFO L168 Benchmark]: RCFGBuilder took 690.69 ms. Allocated memory is still 205.0 MB. Free memory was 180.3 MB in the beginning and 141.8 MB in the end (delta: 38.4 MB). Peak memory consumption was 38.4 MB. Max. memory is 7.1 GB. [2020-07-17 13:14:16,640 INFO L168 Benchmark]: TraceAbstraction took 2059.60 ms. Allocated memory was 205.0 MB in the beginning and 234.4 MB in the end (delta: 29.4 MB). Free memory was 141.8 MB in the beginning and 103.7 MB in the end (delta: 38.1 MB). Peak memory consumption was 67.5 MB. Max. memory is 7.1 GB. [2020-07-17 13:14:16,644 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 136.8 MB. Free memory was 119.0 MB in the beginning and 118.8 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 478.07 ms. Allocated memory was 136.8 MB in the beginning and 205.0 MB in the end (delta: 68.2 MB). Free memory was 100.2 MB in the beginning and 182.3 MB in the end (delta: -82.1 MB). Peak memory consumption was 24.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 109.09 ms. Allocated memory is still 205.0 MB. Free memory was 182.3 MB in the beginning and 180.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 690.69 ms. Allocated memory is still 205.0 MB. Free memory was 180.3 MB in the beginning and 141.8 MB in the end (delta: 38.4 MB). Peak memory consumption was 38.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2059.60 ms. Allocated memory was 205.0 MB in the beginning and 234.4 MB in the end (delta: 29.4 MB). Free memory was 141.8 MB in the beginning and 103.7 MB in the end (delta: 38.1 MB). Peak memory consumption was 67.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 110]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 109, overapproximation of someBinaryArithmeticFLOAToperation at line 104, overapproximation of bitwiseAnd at line 93. Possible FailurePath: [L12] static const float one_modf = 1.0; [L104] float x = -1.0f / 0.0f; [L105] float iptr = __VERIFIER_nondet_float(); [L106] CALL, EXPR modf_float(x, &iptr) [L15] __int32_t i0, j0; [L16] __uint32_t i; [L18] ieee_float_shape_type gf_u; [L19] gf_u.value = (x) [L20] EXPR gf_u.word [L20] (i0) = gf_u.word [L22] j0 = ((i0 >> 23) & 0xff) - 0x7f [L23] COND TRUE j0 < 23 [L24] COND TRUE j0 < 0 [L26] ieee_float_shape_type sf_u; [L27] sf_u.word = (i0 & 0x80000000) [L28] EXPR sf_u.value [L28] (*iptr) = sf_u.value [L30] return x; [L106] RET, EXPR modf_float(x, &iptr) [L106] float res = modf_float(x, &iptr); [L109] EXPR \read(iptr) [L109] CALL, EXPR isinf_float(iptr) [L87] __int32_t ix; [L89] ieee_float_shape_type gf_u; [L90] gf_u.value = (x) [L91] EXPR gf_u.word [L91] (ix) = gf_u.word [L93] ix &= 0x7fffffff [L94] return ((ix) == 0x7f800000L); [L109] RET, EXPR isinf_float(iptr) [L109] isinf_float(iptr) && !(res == -0.0f && __signbit_float(res) == 1) [L109] EXPR res == -0.0f && __signbit_float(res) == 1 [L109] isinf_float(iptr) && !(res == -0.0f && __signbit_float(res) == 1) [L109] COND TRUE isinf_float(iptr) && !(res == -0.0f && __signbit_float(res) == 1) [L110] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 168 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.9s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 316 SDtfs, 42 SDslu, 332 SDs, 0 SdLazy, 424 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 54 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=168occurred 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...