/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/double_req_bl_1072c.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 17:55:17,066 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 17:55:17,069 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 17:55:17,105 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 17:55:17,106 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 17:55:17,107 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 17:55:17,109 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 17:55:17,112 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 17:55:17,114 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 17:55:17,115 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 17:55:17,117 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 17:55:17,118 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 17:55:17,119 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 17:55:17,120 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 17:55:17,122 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 17:55:17,123 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 17:55:17,125 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 17:55:17,126 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 17:55:17,128 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 17:55:17,150 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 17:55:17,153 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 17:55:17,154 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 17:55:17,156 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 17:55:17,157 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 17:55:17,160 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 17:55:17,171 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 17:55:17,173 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 17:55:17,174 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 17:55:17,175 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 [2020-10-23 17:55:17,203 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 17:55:17,203 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 17:55:17,205 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 17:55:17,205 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 17:55:17,206 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 17:55:17,206 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 17:55:17,206 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 17:55:17,206 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 17:55:17,207 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 17:55:17,207 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 17:55:17,207 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 17:55:17,208 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 17:55:17,208 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 17:55:17,208 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 17:55:17,208 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 17:55:17,209 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 17:55:17,209 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 17:55:17,209 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 17:55:17,210 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 17:55:17,210 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 17:55:17,210 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 17:55:17,210 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 17:55:17,211 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 17:55:17,211 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 17:55:17,211 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 17:55:17,212 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 17:55:17,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 17:55:17,212 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 17:55:17,213 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 17:55:17,213 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 17:55:17,623 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 17:55:17,654 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 17:55:17,657 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 17:55:17,658 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 17:55:17,659 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 17:55:17,660 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/double_req_bl_1072c.c [2020-10-23 17:55:17,750 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03c84f867/c26a6fa6c3ff4d9a890e711868ccfc81/FLAGd5dfb151d [2020-10-23 17:55:18,398 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 17:55:18,399 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/double_req_bl_1072c.c [2020-10-23 17:55:18,408 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03c84f867/c26a6fa6c3ff4d9a890e711868ccfc81/FLAGd5dfb151d [2020-10-23 17:55:18,789 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03c84f867/c26a6fa6c3ff4d9a890e711868ccfc81 [2020-10-23 17:55:18,793 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 17:55:18,802 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 17:55:18,808 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 17:55:18,809 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 17:55:18,813 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 17:55:18,815 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 05:55:18" (1/1) ... [2020-10-23 17:55:18,819 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3283571b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:55:18, skipping insertion in model container [2020-10-23 17:55:18,819 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 05:55:18" (1/1) ... [2020-10-23 17:55:18,828 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 17:55:18,849 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 17:55:19,089 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 17:55:19,100 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 17:55:19,133 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 17:55:19,157 INFO L208 MainTranslator]: Completed translation [2020-10-23 17:55:19,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:55:19 WrapperNode [2020-10-23 17:55:19,158 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 17:55:19,159 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 17:55:19,159 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 17:55:19,159 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 17:55:19,173 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:55:19" (1/1) ... [2020-10-23 17:55:19,174 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:55:19" (1/1) ... [2020-10-23 17:55:19,184 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:55:19" (1/1) ... [2020-10-23 17:55:19,185 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:55:19" (1/1) ... [2020-10-23 17:55:19,199 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:55:19" (1/1) ... [2020-10-23 17:55:19,212 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:55:19" (1/1) ... [2020-10-23 17:55:19,221 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:55:19" (1/1) ... [2020-10-23 17:55:19,228 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 17:55:19,229 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 17:55:19,230 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 17:55:19,230 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 17:55:19,235 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:55:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 17:55:19,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 17:55:19,336 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 17:55:19,337 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 17:55:19,337 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_double [2020-10-23 17:55:19,337 INFO L138 BoogieDeclarations]: Found implementation of procedure trunc_double [2020-10-23 17:55:19,337 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_double [2020-10-23 17:55:19,337 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 17:55:19,337 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 17:55:19,338 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 17:55:19,338 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 17:55:19,338 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 17:55:19,338 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_double [2020-10-23 17:55:19,338 INFO L130 BoogieDeclarations]: Found specification of procedure trunc_double [2020-10-23 17:55:19,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-23 17:55:19,339 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 17:55:19,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 17:55:19,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 17:55:19,339 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-10-23 17:55:19,339 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_double [2020-10-23 17:55:19,339 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 17:55:19,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 17:55:19,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 17:55:19,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 17:55:19,884 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 17:55:19,884 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-10-23 17:55:19,886 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 05:55:19 BoogieIcfgContainer [2020-10-23 17:55:19,886 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 17:55:19,888 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 17:55:19,888 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 17:55:19,892 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 17:55:19,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 05:55:18" (1/3) ... [2020-10-23 17:55:19,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e8e78fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 05:55:19, skipping insertion in model container [2020-10-23 17:55:19,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 05:55:19" (2/3) ... [2020-10-23 17:55:19,894 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e8e78fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 05:55:19, skipping insertion in model container [2020-10-23 17:55:19,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 05:55:19" (3/3) ... [2020-10-23 17:55:19,896 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1072c.c [2020-10-23 17:55:19,908 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 17:55:19,913 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 17:55:19,929 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 17:55:19,958 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 17:55:19,959 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 17:55:19,959 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 17:55:19,959 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 17:55:19,959 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 17:55:19,959 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 17:55:19,959 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 17:55:19,960 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 17:55:19,978 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-10-23 17:55:19,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-23 17:55:19,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:55:19,985 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] [2020-10-23 17:55:19,986 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:55:19,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:55:19,993 INFO L82 PathProgramCache]: Analyzing trace with hash -2080445002, now seen corresponding path program 1 times [2020-10-23 17:55:20,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:55:20,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590111292] [2020-10-23 17:55:20,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:55:20,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:55:20,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 17:55:20,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:55:20,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-23 17:55:20,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 17:55:20,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 17:55:20,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590111292] [2020-10-23 17:55:20,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 17:55:20,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 17:55:20,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233243543] [2020-10-23 17:55:20,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 17:55:20,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 17:55:20,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 17:55:20,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 17:55:20,377 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 4 states. [2020-10-23 17:55:20,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 17:55:20,565 INFO L93 Difference]: Finished difference Result 79 states and 111 transitions. [2020-10-23 17:55:20,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 17:55:20,567 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-23 17:55:20,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 17:55:20,577 INFO L225 Difference]: With dead ends: 79 [2020-10-23 17:55:20,577 INFO L226 Difference]: Without dead ends: 38 [2020-10-23 17:55:20,581 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 [2020-10-23 17:55:20,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-23 17:55:20,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-23 17:55:20,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-23 17:55:20,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-23 17:55:20,645 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 20 [2020-10-23 17:55:20,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 17:55:20,645 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-23 17:55:20,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 17:55:20,646 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-23 17:55:20,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-23 17:55:20,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 17:55:20,651 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] [2020-10-23 17:55:20,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 17:55:20,652 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 17:55:20,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 17:55:20,653 INFO L82 PathProgramCache]: Analyzing trace with hash 903181317, now seen corresponding path program 1 times [2020-10-23 17:55:20,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 17:55:20,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8391018] [2020-10-23 17:55:20,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 17:55:20,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 17:55:20,721 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 17:55:20,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 17:55:20,797 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 17:55:20,856 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-23 17:55:20,856 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 17:55:20,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 17:55:20,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 05:55:20 BoogieIcfgContainer [2020-10-23 17:55:20,901 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 17:55:20,903 INFO L168 Benchmark]: Toolchain (without parser) took 2105.61 ms. Allocated memory is still 151.0 MB. Free memory was 126.4 MB in the beginning and 74.8 MB in the end (delta: 51.6 MB). Peak memory consumption was 53.2 MB. Max. memory is 8.0 GB. [2020-10-23 17:55:20,904 INFO L168 Benchmark]: CDTParser took 1.27 ms. Allocated memory is still 151.0 MB. Free memory is still 123.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 17:55:20,905 INFO L168 Benchmark]: CACSL2BoogieTranslator took 349.80 ms. Allocated memory is still 151.0 MB. Free memory was 125.8 MB in the beginning and 115.2 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-23 17:55:20,906 INFO L168 Benchmark]: Boogie Preprocessor took 69.55 ms. Allocated memory is still 151.0 MB. Free memory was 115.2 MB in the beginning and 113.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 17:55:20,907 INFO L168 Benchmark]: RCFGBuilder took 657.02 ms. Allocated memory is still 151.0 MB. Free memory was 113.1 MB in the beginning and 124.6 MB in the end (delta: -11.6 MB). Peak memory consumption was 16.5 MB. Max. memory is 8.0 GB. [2020-10-23 17:55:20,908 INFO L168 Benchmark]: TraceAbstraction took 1012.71 ms. Allocated memory is still 151.0 MB. Free memory was 124.6 MB in the beginning and 74.8 MB in the end (delta: 49.8 MB). Peak memory consumption was 50.3 MB. Max. memory is 8.0 GB. [2020-10-23 17:55:20,913 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.27 ms. Allocated memory is still 151.0 MB. Free memory is still 123.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 349.80 ms. Allocated memory is still 151.0 MB. Free memory was 125.8 MB in the beginning and 115.2 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 69.55 ms. Allocated memory is still 151.0 MB. Free memory was 115.2 MB in the beginning and 113.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 657.02 ms. Allocated memory is still 151.0 MB. Free memory was 113.1 MB in the beginning and 124.6 MB in the end (delta: -11.6 MB). Peak memory consumption was 16.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1012.71 ms. Allocated memory is still 151.0 MB. Free memory was 124.6 MB in the beginning and 74.8 MB in the end (delta: 49.8 MB). Peak memory consumption was 50.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someUnaryDOUBLEoperation at line 83, overapproximation of bitwiseAnd at line 30, overapproximation of someBinaryArithmeticDOUBLEoperation at line 51, overapproximation of someBinaryDOUBLEComparisonOperation at line 87. Possible FailurePath: [L83] double x = -0.0; [L84] CALL, EXPR trunc_double(x) VAL [\old(x)=4294967296] [L20] int signbit; [L21] int msw; [L22] unsigned int lsw; [L23] int exponent_less_1023; VAL [\old(x)=4294967296, x=4294967296] [L25] ieee_double_shape_type ew_u; [L26] ew_u.value = (x) [L27] EXPR ew_u.parts.msw [L27] (msw) = ew_u.parts.msw [L28] EXPR ew_u.parts.lsw [L28] (lsw) = ew_u.parts.lsw [L30] signbit = msw & 0x80000000 [L31] exponent_less_1023 = ((msw & 0x7ff00000) >> 20) - 1023 VAL [\old(x)=4294967296, exponent_less_1023=1024, lsw=11, msw=-2, signbit=-1, x=4294967296] [L32] COND FALSE !(exponent_less_1023 < 20) VAL [\old(x)=4294967296, exponent_less_1023=1024, lsw=11, msw=-2, signbit=-1, x=4294967296] [L49] COND TRUE exponent_less_1023 > 51 VAL [\old(x)=4294967296, exponent_less_1023=1024, lsw=11, msw=-2, signbit=-1, x=4294967296] [L50] COND TRUE exponent_less_1023 == 1024 [L51] return x + x; VAL [\old(x)=4294967296, exponent_less_1023=1024, lsw=11, msw=-2, signbit=-1, x=4294967296] [L84] RET, EXPR trunc_double(x) VAL [trunc_double(x)=4294967299, x=4294967296] [L84] double res = trunc_double(x); [L87] EXPR res == -0.0 && __signbit_double(res) == 1 VAL [res=4294967299, res == -0.0 && __signbit_double(res) == 1=0, x=4294967296] [L87] COND TRUE !(res == -0.0 && __signbit_double(res) == 1) [L88] CALL reach_error() [L3] __assert_fail("0", "double_req_bl_1072c.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 48 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 43 SDtfs, 8 SDslu, 34 SDs, 0 SdLazy, 43 SolverSat, 8 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=45occurred 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, 41 NumberOfCodeBlocks, 41 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 19 ConstructedInterpolants, 0 QuantifiedInterpolants, 1159 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...