/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 --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/double_req_bl_1011a.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 21:03:30,904 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 21:03:30,907 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 21:03:30,931 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-18 21:03:30,940 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 21:03:30,941 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 21:03:30,943 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 21:03:30,944 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 21:03:30,945 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 21:03:30,946 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 21:03:30,947 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 21:03:30,949 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 21:03:30,951 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 21:03:30,952 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 21:03:30,953 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 21:03:30,954 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 21:03:30,956 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 21:03:30,956 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 21:03:30,957 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 21:03:30,958 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 21:03:30,958 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 21:03:30,959 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-18 21:03:30,964 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 21:03:30,965 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 21:03:30,965 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 21:03:30,966 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 21:03:30,991 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 21:03:30,994 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 21:03:30,995 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 21:03:30,999 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 21:03:30,999 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 21:03:30,999 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 21:03:30,999 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 21:03:31,000 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 21:03:31,000 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 21:03:31,000 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 21:03:31,000 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 21:03:31,000 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 21:03:31,001 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 21:03:31,001 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 21:03:31,001 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 21:03:31,001 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 21:03:31,001 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 21:03:31,001 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 21:03:31,004 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 21:03:31,004 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 21:03:31,004 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 21:03:31,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 21:03:31,005 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 21:03:31,005 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 21:03:31,005 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 21:03:31,005 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 21:03:31,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 21:03:31,006 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 21:03:31,006 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 21:03:31,006 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES 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: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=DEEPEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=DEEPEST; [2020-08-18 21:03:31,351 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 21:03:31,367 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 21:03:31,371 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 21:03:31,372 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 21:03:31,372 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 21:03:31,373 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/double_req_bl_1011a.c [2020-08-18 21:03:31,431 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/adc1cfe9d/56ce392e18ff40488aaf095d4811c60b/FLAG37f4f1b06 [2020-08-18 21:03:31,871 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 21:03:31,871 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/double_req_bl_1011a.c [2020-08-18 21:03:31,879 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/adc1cfe9d/56ce392e18ff40488aaf095d4811c60b/FLAG37f4f1b06 [2020-08-18 21:03:32,293 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/adc1cfe9d/56ce392e18ff40488aaf095d4811c60b [2020-08-18 21:03:32,302 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 21:03:32,304 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 21:03:32,305 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 21:03:32,305 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 21:03:32,308 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 21:03:32,309 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:03:32" (1/1) ... [2020-08-18 21:03:32,312 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@424d9305 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:03:32, skipping insertion in model container [2020-08-18 21:03:32,313 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:03:32" (1/1) ... [2020-08-18 21:03:32,321 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 21:03:32,340 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 21:03:32,514 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:03:32,517 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 21:03:32,538 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:03:32,558 INFO L208 MainTranslator]: Completed translation [2020-08-18 21:03:32,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:03:32 WrapperNode [2020-08-18 21:03:32,559 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 21:03:32,559 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 21:03:32,559 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 21:03:32,560 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 21:03:32,650 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:03:32" (1/1) ... [2020-08-18 21:03:32,650 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:03:32" (1/1) ... [2020-08-18 21:03:32,659 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:03:32" (1/1) ... [2020-08-18 21:03:32,660 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:03:32" (1/1) ... [2020-08-18 21:03:32,669 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:03:32" (1/1) ... [2020-08-18 21:03:32,675 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:03:32" (1/1) ... [2020-08-18 21:03:32,676 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:03:32" (1/1) ... [2020-08-18 21:03:32,679 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 21:03:32,679 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 21:03:32,679 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 21:03:32,680 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 21:03:32,680 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:03:32" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-18 21:03:32,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 21:03:32,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 21:03:32,748 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_double [2020-08-18 21:03:32,748 INFO L138 BoogieDeclarations]: Found implementation of procedure fabs_double [2020-08-18 21:03:32,748 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 21:03:32,749 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 21:03:32,749 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_double [2020-08-18 21:03:32,749 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 21:03:32,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-08-18 21:03:32,749 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 21:03:32,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 21:03:32,750 INFO L130 BoogieDeclarations]: Found specification of procedure fabs_double [2020-08-18 21:03:32,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 21:03:32,750 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-08-18 21:03:32,750 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 21:03:32,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 21:03:32,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 21:03:33,022 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 21:03:33,023 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-08-18 21:03:33,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:03:33 BoogieIcfgContainer [2020-08-18 21:03:33,028 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 21:03:33,030 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 21:03:33,030 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 21:03:33,034 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 21:03:33,034 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 09:03:32" (1/3) ... [2020-08-18 21:03:33,035 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48721038 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:03:33, skipping insertion in model container [2020-08-18 21:03:33,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:03:32" (2/3) ... [2020-08-18 21:03:33,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48721038 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:03:33, skipping insertion in model container [2020-08-18 21:03:33,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:03:33" (3/3) ... [2020-08-18 21:03:33,037 INFO L109 eAbstractionObserver]: Analyzing ICFG double_req_bl_1011a.c [2020-08-18 21:03:33,050 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 21:03:33,059 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 21:03:33,078 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 21:03:33,105 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 21:03:33,105 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 21:03:33,106 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 21:03:33,106 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 21:03:33,106 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 21:03:33,106 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 21:03:33,106 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 21:03:33,106 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 21:03:33,127 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-08-18 21:03:33,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 21:03:33,133 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:03:33,134 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:03:33,135 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:03:33,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:03:33,142 INFO L82 PathProgramCache]: Analyzing trace with hash -2010282984, now seen corresponding path program 1 times [2020-08-18 21:03:33,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:03:33,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1957769589] [2020-08-18 21:03:33,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:03:33,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:03:33,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:03:33,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:03:33,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 21:03:33,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:03:33,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:03:33,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1957769589] [2020-08-18 21:03:33,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:03:33,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 21:03:33,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851743632] [2020-08-18 21:03:33,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 21:03:33,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:03:33,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 21:03:33,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 21:03:33,404 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 4 states. [2020-08-18 21:03:33,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:03:33,572 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2020-08-18 21:03:33,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 21:03:33,574 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-08-18 21:03:33,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:03:33,584 INFO L225 Difference]: With dead ends: 56 [2020-08-18 21:03:33,584 INFO L226 Difference]: Without dead ends: 28 [2020-08-18 21:03:33,588 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:03:33,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-18 21:03:33,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-08-18 21:03:33,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-18 21:03:33,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-08-18 21:03:33,653 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 17 [2020-08-18 21:03:33,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:03:33,654 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-08-18 21:03:33,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 21:03:33,654 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-08-18 21:03:33,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 21:03:33,656 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:03:33,657 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:03:33,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 21:03:33,658 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:03:33,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:03:33,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1410255941, now seen corresponding path program 1 times [2020-08-18 21:03:33,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:03:33,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628999642] [2020-08-18 21:03:33,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:03:33,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 21:03:33,744 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 21:03:33,744 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 21:03:33,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 21:03:33,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 09:03:33 BoogieIcfgContainer [2020-08-18 21:03:33,765 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 21:03:33,767 INFO L168 Benchmark]: Toolchain (without parser) took 1463.02 ms. Allocated memory was 137.9 MB in the beginning and 200.8 MB in the end (delta: 62.9 MB). Free memory was 101.1 MB in the beginning and 121.1 MB in the end (delta: -20.0 MB). Peak memory consumption was 42.9 MB. Max. memory is 7.1 GB. [2020-08-18 21:03:33,768 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 21:03:33,769 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.29 ms. Allocated memory is still 137.9 MB. Free memory was 100.9 MB in the beginning and 90.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-08-18 21:03:33,771 INFO L168 Benchmark]: Boogie Preprocessor took 119.60 ms. Allocated memory was 137.9 MB in the beginning and 200.8 MB in the end (delta: 62.9 MB). Free memory was 90.3 MB in the beginning and 177.7 MB in the end (delta: -87.5 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2020-08-18 21:03:33,772 INFO L168 Benchmark]: RCFGBuilder took 349.53 ms. Allocated memory is still 200.8 MB. Free memory was 177.7 MB in the beginning and 159.2 MB in the end (delta: 18.6 MB). Peak memory consumption was 18.6 MB. Max. memory is 7.1 GB. [2020-08-18 21:03:33,773 INFO L168 Benchmark]: TraceAbstraction took 734.72 ms. Allocated memory is still 200.8 MB. Free memory was 158.5 MB in the beginning and 121.1 MB in the end (delta: 37.4 MB). Peak memory consumption was 37.4 MB. Max. memory is 7.1 GB. [2020-08-18 21:03:33,777 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 254.29 ms. Allocated memory is still 137.9 MB. Free memory was 100.9 MB in the beginning and 90.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 119.60 ms. Allocated memory was 137.9 MB in the beginning and 200.8 MB in the end (delta: 62.9 MB). Free memory was 90.3 MB in the beginning and 177.7 MB in the end (delta: -87.5 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 349.53 ms. Allocated memory is still 200.8 MB. Free memory was 177.7 MB in the beginning and 159.2 MB in the end (delta: 18.6 MB). Peak memory consumption was 18.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 734.72 ms. Allocated memory is still 200.8 MB. Free memory was 158.5 MB in the beginning and 121.1 MB in the end (delta: 37.4 MB). Peak memory consumption was 37.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 52]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 51, overapproximation of bitwiseAnd at line 35. Possible FailurePath: [L47] double x = 0.0; [L48] CALL, EXPR fabs_double(x) [L26] __uint32_t high; [L28] ieee_double_shape_type gh_u; [L29] gh_u.value = (x) [L30] EXPR gh_u.parts.msw [L30] (high) = gh_u.parts.msw [L33] ieee_double_shape_type sh_u; [L34] sh_u.value = (x) [L35] sh_u.parts.msw = (high & 0x7fffffff) [L36] EXPR sh_u.value [L36] (x) = sh_u.value [L38] return x; [L48] RET, EXPR fabs_double(x) [L48] double res = fabs_double(x); [L51] EXPR res == 0.0 && __signbit_double(res) == 0 [L51] COND TRUE !(res == 0.0 && __signbit_double(res) == 0) [L52] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 26 SDtfs, 21 SDslu, 5 SDs, 0 SdLazy, 31 SolverSat, 11 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, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 36 NumberOfCodeBlocks, 36 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 16 ConstructedInterpolants, 0 QuantifiedInterpolants, 592 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...