/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_1010.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 10:16:53,558 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:16:53,563 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:16:53,607 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:16:53,608 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:16:53,616 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:16:53,619 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:16:53,623 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:16:53,626 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:16:53,629 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:16:53,630 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:16:53,633 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:16:53,634 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:16:53,637 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:16:53,640 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:16:53,642 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:16:53,644 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:16:53,645 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:16:53,647 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:16:53,655 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:16:53,658 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:16:53,659 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:16:53,660 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:16:53,661 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:16:53,673 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 10:16:53,674 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 10:16:53,681 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 10:16:53,682 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 10:16:53,683 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 10:16:53,684 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-09-21 10:16:53,693 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:16:53,694 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:16:53,695 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:16:53,696 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 [2020-09-21 10:16:53,732 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:16:53,732 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:16:53,734 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:16:53,734 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:16:53,734 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:16:53,734 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:16:53,735 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:16:53,735 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:16:53,735 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:16:53,735 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:16:53,735 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:16:53,736 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:16:53,736 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:16:53,736 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:16:53,736 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:16:53,736 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:16:53,737 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:16:53,737 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:16:53,737 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:16:53,737 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:16:53,737 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:16:53,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:16:53,738 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:16:53,738 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:16:53,738 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:16:53,738 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:16:53,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:16:53,739 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:16:53,739 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:16:53,739 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 [2020-09-21 10:16:54,212 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:16:54,234 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:16:54,238 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:16:54,240 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:16:54,240 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:16:54,241 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1010.c [2020-09-21 10:16:54,324 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/650c6f434/f125f4792ba34374beb4f49823c01f1c/FLAGa3bd3e7ea [2020-09-21 10:16:54,882 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:16:54,882 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_1010.c [2020-09-21 10:16:54,891 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/650c6f434/f125f4792ba34374beb4f49823c01f1c/FLAGa3bd3e7ea [2020-09-21 10:16:55,217 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/650c6f434/f125f4792ba34374beb4f49823c01f1c [2020-09-21 10:16:55,234 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:16:55,242 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:16:55,245 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:16:55,245 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:16:55,250 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:16:55,251 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:16:55" (1/1) ... [2020-09-21 10:16:55,257 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68e64c0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:16:55, skipping insertion in model container [2020-09-21 10:16:55,257 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:16:55" (1/1) ... [2020-09-21 10:16:55,267 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:16:55,292 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:16:55,552 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:16:55,559 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:16:55,590 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:16:55,622 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:16:55,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:16:55 WrapperNode [2020-09-21 10:16:55,624 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:16:55,626 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:16:55,626 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:16:55,626 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:16:55,719 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:16:55" (1/1) ... [2020-09-21 10:16:55,720 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:16:55" (1/1) ... [2020-09-21 10:16:55,730 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:16:55" (1/1) ... [2020-09-21 10:16:55,731 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:16:55" (1/1) ... [2020-09-21 10:16:55,740 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:16:55" (1/1) ... [2020-09-21 10:16:55,746 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:16:55" (1/1) ... [2020-09-21 10:16:55,748 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:16:55" (1/1) ... [2020-09-21 10:16:55,750 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:16:55,751 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:16:55,751 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:16:55,751 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:16:55,752 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:16:55" (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 [2020-09-21 10:16:55,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:16:55,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:16:55,828 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2020-09-21 10:16:55,828 INFO L138 BoogieDeclarations]: Found implementation of procedure fabs_float [2020-09-21 10:16:55,829 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:16:55,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:16:55,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-09-21 10:16:55,829 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2020-09-21 10:16:55,829 INFO L130 BoogieDeclarations]: Found specification of procedure fabs_float [2020-09-21 10:16:55,830 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-21 10:16:55,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-09-21 10:16:55,830 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 10:16:55,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 10:16:55,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 10:16:55,830 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-09-21 10:16:55,831 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:16:55,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:16:55,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:16:56,157 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:16:56,157 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-09-21 10:16:56,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:16:56 BoogieIcfgContainer [2020-09-21 10:16:56,162 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:16:56,164 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:16:56,164 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:16:56,167 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:16:56,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:16:55" (1/3) ... [2020-09-21 10:16:56,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b9dbe1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:16:56, skipping insertion in model container [2020-09-21 10:16:56,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:16:55" (2/3) ... [2020-09-21 10:16:56,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b9dbe1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:16:56, skipping insertion in model container [2020-09-21 10:16:56,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:16:56" (3/3) ... [2020-09-21 10:16:56,171 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1010.c [2020-09-21 10:16:56,182 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:16:56,192 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:16:56,215 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:16:56,242 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:16:56,242 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:16:56,242 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:16:56,242 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:16:56,242 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:16:56,242 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:16:56,243 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:16:56,243 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:16:56,264 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-09-21 10:16:56,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-21 10:16:56,270 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:16:56,272 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] [2020-09-21 10:16:56,272 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:16:56,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:16:56,280 INFO L82 PathProgramCache]: Analyzing trace with hash -156268844, now seen corresponding path program 1 times [2020-09-21 10:16:56,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:16:56,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1844135965] [2020-09-21 10:16:56,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:16:56,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:16:56,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:16:56,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:16:56,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-21 10:16:56,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:16:56,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-09-21 10:16:56,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:16:56,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:16:56,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1844135965] [2020-09-21 10:16:56,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:16:56,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 10:16:56,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225379675] [2020-09-21 10:16:56,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 10:16:56,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:16:56,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 10:16:56,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 10:16:56,597 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 4 states. [2020-09-21 10:16:56,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:16:56,768 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-09-21 10:16:56,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 10:16:56,771 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-09-21 10:16:56,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:16:56,783 INFO L225 Difference]: With dead ends: 48 [2020-09-21 10:16:56,784 INFO L226 Difference]: Without dead ends: 24 [2020-09-21 10:16:56,788 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:16:56,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-09-21 10:16:56,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-09-21 10:16:56,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-21 10:16:56,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 23 transitions. [2020-09-21 10:16:56,835 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 23 transitions. Word has length 21 [2020-09-21 10:16:56,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:16:56,835 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 23 transitions. [2020-09-21 10:16:56,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 10:16:56,836 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 23 transitions. [2020-09-21 10:16:56,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-21 10:16:56,837 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:16:56,837 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 10:16:56,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:16:56,838 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:16:56,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:16:56,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1988246281, now seen corresponding path program 1 times [2020-09-21 10:16:56,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:16:56,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1563794041] [2020-09-21 10:16:56,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:16:56,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 10:16:56,902 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 10:16:56,902 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 10:16:56,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:16:56,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 10:16:56 BoogieIcfgContainer [2020-09-21 10:16:56,929 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 10:16:56,933 INFO L168 Benchmark]: Toolchain (without parser) took 1695.38 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 102.3 MB in the beginning and 126.4 MB in the end (delta: -24.1 MB). Peak memory consumption was 38.8 MB. Max. memory is 7.1 GB. [2020-09-21 10:16:56,934 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-09-21 10:16:56,935 INFO L168 Benchmark]: CACSL2BoogieTranslator took 380.39 ms. Allocated memory is still 139.5 MB. Free memory was 101.7 MB in the beginning and 91.4 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-09-21 10:16:56,936 INFO L168 Benchmark]: Boogie Preprocessor took 124.77 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 91.4 MB in the beginning and 179.6 MB in the end (delta: -88.1 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-09-21 10:16:56,937 INFO L168 Benchmark]: RCFGBuilder took 411.70 ms. Allocated memory is still 202.4 MB. Free memory was 179.6 MB in the beginning and 163.6 MB in the end (delta: 16.0 MB). Peak memory consumption was 16.0 MB. Max. memory is 7.1 GB. [2020-09-21 10:16:56,938 INFO L168 Benchmark]: TraceAbstraction took 765.98 ms. Allocated memory is still 202.4 MB. Free memory was 162.9 MB in the beginning and 126.4 MB in the end (delta: 36.5 MB). Peak memory consumption was 36.5 MB. Max. memory is 7.1 GB. [2020-09-21 10:16:56,943 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 380.39 ms. Allocated memory is still 139.5 MB. Free memory was 101.7 MB in the beginning and 91.4 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 124.77 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 91.4 MB in the beginning and 179.6 MB in the end (delta: -88.1 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 411.70 ms. Allocated memory is still 202.4 MB. Free memory was 179.6 MB in the beginning and 163.6 MB in the end (delta: 16.0 MB). Peak memory consumption was 16.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 765.98 ms. Allocated memory is still 202.4 MB. Free memory was 162.9 MB in the beginning and 126.4 MB in the end (delta: 36.5 MB). Peak memory consumption was 36.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 40]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 12, overapproximation of someBinaryArithmeticFLOAToperation at line 35, overapproximation of bitwiseAnd at line 23. Possible FailurePath: [L35] float x = 0.0f / 0.0f; [L36] CALL, EXPR fabs_float(x) [L15] __uint32_t ix; [L17] ieee_float_shape_type gf_u; [L18] gf_u.value = (x) [L19] EXPR gf_u.word [L19] (ix) = gf_u.word [L22] ieee_float_shape_type sf_u; [L23] sf_u.word = (ix & 0x7fffffff) [L24] EXPR sf_u.value [L24] (x) = sf_u.value [L26] return x; [L36] RET, EXPR fabs_float(x) [L36] float res = fabs_float(x); [L39] CALL, EXPR isnan_float(res) [L12] return x != x; [L39] RET, EXPR isnan_float(res) [L39] COND TRUE !isnan_float(res) [L40] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 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: 22 SDtfs, 18 SDslu, 5 SDs, 0 SdLazy, 24 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred 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, 44 NumberOfCodeBlocks, 44 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 820 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...