/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 false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1130a.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 15:25:55,898 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 15:25:55,901 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 15:25:55,933 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 15:25:55,934 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 15:25:55,935 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 15:25:55,936 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 15:25:55,940 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 15:25:55,948 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 15:25:55,949 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 15:25:55,950 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 15:25:55,952 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 15:25:55,953 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 15:25:55,954 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 15:25:55,956 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 15:25:55,958 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 15:25:55,959 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 15:25:55,963 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 15:25:55,966 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 15:25:55,971 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 15:25:55,973 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 15:25:55,974 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 15:25:55,976 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 15:25:55,977 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 15:25:55,988 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 15:25:56,002 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 15:25:56,003 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 15:25:56,004 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 15:25:56,005 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 15:25:56,046 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 15:25:56,046 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 15:25:56,048 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 15:25:56,048 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 15:25:56,049 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 15:25:56,049 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 15:25:56,049 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 15:25:56,050 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 15:25:56,050 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 15:25:56,050 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 15:25:56,051 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 15:25:56,051 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 15:25:56,051 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 15:25:56,052 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 15:25:56,052 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 15:25:56,052 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 15:25:56,053 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 15:25:56,053 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 15:25:56,053 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 15:25:56,053 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 15:25:56,053 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 15:25:56,054 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 15:25:56,054 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 15:25:56,054 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 15:25:56,054 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 15:25:56,054 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 15:25:56,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 15:25:56,055 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 15:25:56,055 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 15:25:56,055 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 -> false [2020-08-18 15:25:56,356 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 15:25:56,368 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 15:25:56,372 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 15:25:56,373 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 15:25:56,374 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 15:25:56,374 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1130a.c [2020-08-18 15:25:56,428 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a5d547453/d35fc370f8da4a818add39cdb3fdd10c/FLAG26f3772c2 [2020-08-18 15:25:56,912 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 15:25:56,913 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_1130a.c [2020-08-18 15:25:56,920 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a5d547453/d35fc370f8da4a818add39cdb3fdd10c/FLAG26f3772c2 [2020-08-18 15:25:57,330 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a5d547453/d35fc370f8da4a818add39cdb3fdd10c [2020-08-18 15:25:57,346 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 15:25:57,348 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 15:25:57,353 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 15:25:57,354 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 15:25:57,360 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 15:25:57,361 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 03:25:57" (1/1) ... [2020-08-18 15:25:57,365 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d77a43a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:25:57, skipping insertion in model container [2020-08-18 15:25:57,365 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 03:25:57" (1/1) ... [2020-08-18 15:25:57,374 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 15:25:57,409 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 15:25:57,620 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 15:25:57,626 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 15:25:57,780 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 15:25:57,805 INFO L208 MainTranslator]: Completed translation [2020-08-18 15:25:57,805 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:25:57 WrapperNode [2020-08-18 15:25:57,805 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 15:25:57,806 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 15:25:57,806 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 15:25:57,807 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 15:25:57,821 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:25:57" (1/1) ... [2020-08-18 15:25:57,822 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:25:57" (1/1) ... [2020-08-18 15:25:57,835 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:25:57" (1/1) ... [2020-08-18 15:25:57,835 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:25:57" (1/1) ... [2020-08-18 15:25:57,851 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:25:57" (1/1) ... [2020-08-18 15:25:57,861 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:25:57" (1/1) ... [2020-08-18 15:25:57,864 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:25:57" (1/1) ... [2020-08-18 15:25:57,868 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 15:25:57,869 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 15:25:57,869 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 15:25:57,869 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 15:25:57,874 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:25:57" (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 15:25:57,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 15:25:57,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 15:25:57,942 INFO L138 BoogieDeclarations]: Found implementation of procedure fmod_float [2020-08-18 15:25:57,942 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-08-18 15:25:57,942 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 15:25:57,942 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 15:25:57,943 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-08-18 15:25:57,943 INFO L130 BoogieDeclarations]: Found specification of procedure fmod_float [2020-08-18 15:25:57,943 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 15:25:57,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-08-18 15:25:57,944 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 15:25:57,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 15:25:57,945 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-08-18 15:25:57,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 15:25:57,945 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-08-18 15:25:57,946 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 15:25:57,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 15:25:57,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2020-08-18 15:25:57,946 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 15:25:58,456 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 15:25:58,456 INFO L295 CfgBuilder]: Removed 14 assume(true) statements. [2020-08-18 15:25:58,461 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 03:25:58 BoogieIcfgContainer [2020-08-18 15:25:58,461 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 15:25:58,465 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 15:25:58,466 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 15:25:58,469 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 15:25:58,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 03:25:57" (1/3) ... [2020-08-18 15:25:58,470 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7abc2881 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 03:25:58, skipping insertion in model container [2020-08-18 15:25:58,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:25:57" (2/3) ... [2020-08-18 15:25:58,471 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7abc2881 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 03:25:58, skipping insertion in model container [2020-08-18 15:25:58,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 03:25:58" (3/3) ... [2020-08-18 15:25:58,473 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1130a.c [2020-08-18 15:25:58,484 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 15:25:58,493 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 15:25:58,507 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 15:25:58,529 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 15:25:58,530 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 15:25:58,530 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 15:25:58,530 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 15:25:58,530 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 15:25:58,530 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 15:25:58,531 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 15:25:58,531 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 15:25:58,549 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2020-08-18 15:25:58,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 15:25:58,556 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:25:58,557 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 15:25:58,557 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:25:58,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:25:58,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1920116781, now seen corresponding path program 1 times [2020-08-18 15:25:58,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:25:58,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1348414878] [2020-08-18 15:25:58,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:25:58,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:25:58,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:25:58,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:25:58,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 15:25:58,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:25:58,824 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 15:25:58,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1348414878] [2020-08-18 15:25:58,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:25:58,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 15:25:58,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982586618] [2020-08-18 15:25:58,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 15:25:58,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:25:58,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 15:25:58,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 15:25:58,852 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 4 states. [2020-08-18 15:25:59,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:25:59,136 INFO L93 Difference]: Finished difference Result 116 states and 180 transitions. [2020-08-18 15:25:59,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:25:59,139 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-08-18 15:25:59,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:25:59,151 INFO L225 Difference]: With dead ends: 116 [2020-08-18 15:25:59,151 INFO L226 Difference]: Without dead ends: 56 [2020-08-18 15:25:59,155 INFO L675 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 [2020-08-18 15:25:59,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-08-18 15:25:59,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-08-18 15:25:59,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-08-18 15:25:59,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2020-08-18 15:25:59,204 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 19 [2020-08-18 15:25:59,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:25:59,205 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2020-08-18 15:25:59,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 15:25:59,205 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2020-08-18 15:25:59,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 15:25:59,206 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:25:59,206 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] [2020-08-18 15:25:59,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 15:25:59,207 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:25:59,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:25:59,208 INFO L82 PathProgramCache]: Analyzing trace with hash -2095475350, now seen corresponding path program 1 times [2020-08-18 15:25:59,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:25:59,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [369762042] [2020-08-18 15:25:59,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:25:59,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 15:25:59,297 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 15:25:59,297 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 15:25:59,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 15:25:59,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 03:25:59 BoogieIcfgContainer [2020-08-18 15:25:59,320 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 15:25:59,323 INFO L168 Benchmark]: Toolchain (without parser) took 1974.10 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 103.5 MB in the beginning and 96.6 MB in the end (delta: 6.9 MB). Peak memory consumption was 69.8 MB. Max. memory is 7.1 GB. [2020-08-18 15:25:59,324 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 15:25:59,325 INFO L168 Benchmark]: CACSL2BoogieTranslator took 452.64 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 103.3 MB in the beginning and 180.6 MB in the end (delta: -77.3 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. [2020-08-18 15:25:59,326 INFO L168 Benchmark]: Boogie Preprocessor took 62.20 ms. Allocated memory is still 203.9 MB. Free memory was 180.6 MB in the beginning and 178.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-08-18 15:25:59,327 INFO L168 Benchmark]: RCFGBuilder took 592.45 ms. Allocated memory is still 203.9 MB. Free memory was 178.0 MB in the beginning and 149.5 MB in the end (delta: 28.5 MB). Peak memory consumption was 28.5 MB. Max. memory is 7.1 GB. [2020-08-18 15:25:59,328 INFO L168 Benchmark]: TraceAbstraction took 854.92 ms. Allocated memory is still 203.9 MB. Free memory was 148.9 MB in the beginning and 96.6 MB in the end (delta: 52.2 MB). Peak memory consumption was 52.2 MB. Max. memory is 7.1 GB. [2020-08-18 15:25:59,333 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 452.64 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 103.3 MB in the beginning and 180.6 MB in the end (delta: -77.3 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 62.20 ms. Allocated memory is still 203.9 MB. Free memory was 180.6 MB in the beginning and 178.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 592.45 ms. Allocated memory is still 203.9 MB. Free memory was 178.0 MB in the beginning and 149.5 MB in the end (delta: 28.5 MB). Peak memory consumption was 28.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 854.92 ms. Allocated memory is still 203.9 MB. Free memory was 148.9 MB in the beginning and 96.6 MB in the end (delta: 52.2 MB). Peak memory consumption was 52.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 135]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 134, overapproximation of someUnaryDOUBLEoperation at line 14, overapproximation of bitwiseAnd at line 30, overapproximation of bitwiseXor at line 31, overapproximation of someBinaryArithmeticFLOAToperation at line 35. Possible FailurePath: [L12-L15] static const float one_fmod = 1.0, Zero_fmod[] = { 0.0, -0.0, }; [L126] float x = 0.0f; [L127] float y = __VERIFIER_nondet_float(); [L129] COND TRUE (y < 0.0f || y > 0.0f) [L131] CALL, EXPR fmod_float(x, y) [L18] __int32_t n, hx, hy, hz, ix, iy, sx, i; [L21] ieee_float_shape_type gf_u; [L22] gf_u.value = (x) [L23] EXPR gf_u.word [L23] (hx) = gf_u.word [L26] ieee_float_shape_type gf_u; [L27] gf_u.value = (y) [L28] EXPR gf_u.word [L28] (hy) = gf_u.word [L30] sx = hx & 0x80000000 [L31] hx ^= sx [L32] hy &= 0x7fffffff [L34] COND TRUE ((hy) == 0) || !((hx) < 0x7f800000L) || ((hy) > 0x7f800000L) [L35] return (x * y) / (x * y); [L131] RET, EXPR fmod_float(x, y) [L131] float res = fmod_float(x, y); [L134] EXPR res == 0.0f && __signbit_float(res) == 0 [L134] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L135] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 61 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 75 SDtfs, 14 SDslu, 61 SDs, 0 SdLazy, 80 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s 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=61occurred 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, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 40 NumberOfCodeBlocks, 40 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 918 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...