/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_0730b.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 19:42:35,281 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 19:42:35,283 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 19:42:35,320 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 19:42:35,320 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 19:42:35,321 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 19:42:35,323 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 19:42:35,324 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 19:42:35,326 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 19:42:35,327 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 19:42:35,328 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 19:42:35,329 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 19:42:35,329 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 19:42:35,330 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 19:42:35,331 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 19:42:35,332 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 19:42:35,333 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 19:42:35,333 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 19:42:35,335 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 19:42:35,337 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 19:42:35,338 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 19:42:35,340 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 19:42:35,341 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 19:42:35,341 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 19:42:35,344 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 19:42:35,344 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 19:42:35,345 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 19:42:35,345 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 19:42:35,346 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 19:42:35,347 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-21 19:42:35,351 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 19:42:35,352 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 19:42:35,353 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 19:42:35,354 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 [2020-08-21 19:42:35,375 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 19:42:35,375 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 19:42:35,376 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 19:42:35,377 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 19:42:35,377 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 19:42:35,377 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 19:42:35,377 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 19:42:35,377 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 19:42:35,378 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 19:42:35,378 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 19:42:35,378 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 19:42:35,378 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 19:42:35,378 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 19:42:35,379 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 19:42:35,379 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 19:42:35,379 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 19:42:35,379 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 19:42:35,379 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 19:42:35,379 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 19:42:35,380 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 19:42:35,380 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 19:42:35,380 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 19:42:35,380 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 19:42:35,380 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 19:42:35,381 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 19:42:35,381 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 19:42:35,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 19:42:35,381 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 19:42:35,382 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 19:42:35,382 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=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; [2020-08-21 19:42:35,702 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 19:42:35,715 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 19:42:35,719 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 19:42:35,720 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 19:42:35,721 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 19:42:35,722 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_0730b.c [2020-08-21 19:42:35,784 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5d5f8dd04/9ac2ac921608401d89861ff20a4e9052/FLAG2a6713c49 [2020-08-21 19:42:36,256 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 19:42:36,257 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_0730b.c [2020-08-21 19:42:36,267 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5d5f8dd04/9ac2ac921608401d89861ff20a4e9052/FLAG2a6713c49 [2020-08-21 19:42:36,632 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5d5f8dd04/9ac2ac921608401d89861ff20a4e9052 [2020-08-21 19:42:36,644 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 19:42:36,646 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 19:42:36,649 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 19:42:36,649 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 19:42:36,653 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 19:42:36,654 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 07:42:36" (1/1) ... [2020-08-21 19:42:36,658 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b03ff29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:42:36, skipping insertion in model container [2020-08-21 19:42:36,659 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 07:42:36" (1/1) ... [2020-08-21 19:42:36,668 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 19:42:36,689 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 19:42:36,986 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 19:42:36,994 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 19:42:37,189 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 19:42:37,218 INFO L208 MainTranslator]: Completed translation [2020-08-21 19:42:37,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:42:37 WrapperNode [2020-08-21 19:42:37,220 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 19:42:37,221 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 19:42:37,221 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 19:42:37,221 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 19:42:37,236 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:42:37" (1/1) ... [2020-08-21 19:42:37,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:42:37" (1/1) ... [2020-08-21 19:42:37,260 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:42:37" (1/1) ... [2020-08-21 19:42:37,261 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:42:37" (1/1) ... [2020-08-21 19:42:37,289 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:42:37" (1/1) ... [2020-08-21 19:42:37,306 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:42:37" (1/1) ... [2020-08-21 19:42:37,310 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:42:37" (1/1) ... [2020-08-21 19:42:37,320 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 19:42:37,320 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 19:42:37,321 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 19:42:37,321 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 19:42:37,323 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:42:37" (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 [2020-08-21 19:42:37,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 19:42:37,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 19:42:37,388 INFO L138 BoogieDeclarations]: Found implementation of procedure __ieee754_sqrtf [2020-08-21 19:42:37,389 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-08-21 19:42:37,389 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 19:42:37,389 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 19:42:37,390 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-08-21 19:42:37,390 INFO L130 BoogieDeclarations]: Found specification of procedure __ieee754_sqrtf [2020-08-21 19:42:37,390 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 19:42:37,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-08-21 19:42:37,392 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 19:42:37,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 19:42:37,392 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 19:42:37,392 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-08-21 19:42:37,393 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-08-21 19:42:37,394 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 19:42:37,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 19:42:37,394 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 19:42:37,777 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 19:42:37,777 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-08-21 19:42:37,783 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 07:42:37 BoogieIcfgContainer [2020-08-21 19:42:37,783 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 19:42:37,785 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 19:42:37,785 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 19:42:37,788 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 19:42:37,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 07:42:36" (1/3) ... [2020-08-21 19:42:37,789 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21925395 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 07:42:37, skipping insertion in model container [2020-08-21 19:42:37,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:42:37" (2/3) ... [2020-08-21 19:42:37,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21925395 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 07:42:37, skipping insertion in model container [2020-08-21 19:42:37,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 07:42:37" (3/3) ... [2020-08-21 19:42:37,792 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_0730b.c [2020-08-21 19:42:37,804 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 19:42:37,821 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 19:42:37,833 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 19:42:37,857 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 19:42:37,857 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 19:42:37,857 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 19:42:37,858 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 19:42:37,858 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 19:42:37,858 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 19:42:37,858 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 19:42:37,858 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 19:42:37,878 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2020-08-21 19:42:37,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-21 19:42:37,884 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:42:37,885 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:42:37,886 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:42:37,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:42:37,891 INFO L82 PathProgramCache]: Analyzing trace with hash 380065484, now seen corresponding path program 1 times [2020-08-21 19:42:37,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:42:37,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1946076397] [2020-08-21 19:42:37,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:42:38,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:42:38,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:42:38,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:42:38,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 19:42:38,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:42:38,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:42:38,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1946076397] [2020-08-21 19:42:38,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:42:38,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 19:42:38,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692632217] [2020-08-21 19:42:38,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 19:42:38,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:42:38,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 19:42:38,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 19:42:38,176 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 4 states. [2020-08-21 19:42:38,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:42:38,422 INFO L93 Difference]: Finished difference Result 92 states and 133 transitions. [2020-08-21 19:42:38,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 19:42:38,424 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-08-21 19:42:38,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:42:38,434 INFO L225 Difference]: With dead ends: 92 [2020-08-21 19:42:38,434 INFO L226 Difference]: Without dead ends: 46 [2020-08-21 19:42:38,437 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 [2020-08-21 19:42:38,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-21 19:42:38,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-08-21 19:42:38,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-21 19:42:38,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2020-08-21 19:42:38,478 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 17 [2020-08-21 19:42:38,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:42:38,478 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2020-08-21 19:42:38,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 19:42:38,479 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2020-08-21 19:42:38,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 19:42:38,480 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:42:38,480 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:42:38,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 19:42:38,481 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:42:38,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:42:38,481 INFO L82 PathProgramCache]: Analyzing trace with hash 2048303218, now seen corresponding path program 1 times [2020-08-21 19:42:38,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:42:38,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [702520071] [2020-08-21 19:42:38,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:42:38,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 19:42:38,556 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 19:42:38,556 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 19:42:38,562 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 19:42:38,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 07:42:38 BoogieIcfgContainer [2020-08-21 19:42:38,578 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 19:42:38,581 INFO L168 Benchmark]: Toolchain (without parser) took 1934.44 ms. Allocated memory was 139.5 MB in the beginning and 206.6 MB in the end (delta: 67.1 MB). Free memory was 102.3 MB in the beginning and 109.7 MB in the end (delta: -7.5 MB). Peak memory consumption was 59.6 MB. Max. memory is 7.1 GB. [2020-08-21 19:42:38,582 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 19:42:38,583 INFO L168 Benchmark]: CACSL2BoogieTranslator took 571.62 ms. Allocated memory was 139.5 MB in the beginning and 206.6 MB in the end (delta: 67.1 MB). Free memory was 102.0 MB in the beginning and 183.5 MB in the end (delta: -81.4 MB). Peak memory consumption was 22.7 MB. Max. memory is 7.1 GB. [2020-08-21 19:42:38,584 INFO L168 Benchmark]: Boogie Preprocessor took 99.33 ms. Allocated memory is still 206.6 MB. Free memory was 183.5 MB in the beginning and 181.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-08-21 19:42:38,585 INFO L168 Benchmark]: RCFGBuilder took 463.24 ms. Allocated memory is still 206.6 MB. Free memory was 181.4 MB in the beginning and 159.0 MB in the end (delta: 22.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. [2020-08-21 19:42:38,586 INFO L168 Benchmark]: TraceAbstraction took 793.72 ms. Allocated memory is still 206.6 MB. Free memory was 158.4 MB in the beginning and 109.7 MB in the end (delta: 48.6 MB). Peak memory consumption was 48.6 MB. Max. memory is 7.1 GB. [2020-08-21 19:42:38,590 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 571.62 ms. Allocated memory was 139.5 MB in the beginning and 206.6 MB in the end (delta: 67.1 MB). Free memory was 102.0 MB in the beginning and 183.5 MB in the end (delta: -81.4 MB). Peak memory consumption was 22.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 99.33 ms. Allocated memory is still 206.6 MB. Free memory was 183.5 MB in the beginning and 181.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 463.24 ms. Allocated memory is still 206.6 MB. Free memory was 181.4 MB in the beginning and 159.0 MB in the end (delta: 22.4 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 793.72 ms. Allocated memory is still 206.6 MB. Free memory was 158.4 MB in the beginning and 109.7 MB in the end (delta: 48.6 MB). Peak memory consumption was 48.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 106]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 105, overapproximation of bitwiseAnd at line 24, overapproximation of someBinaryArithmeticFLOAToperation at line 27. Possible FailurePath: [L12] static const float one_sqrt = 1.0, tiny_sqrt = 1.0e-30; [L101] float x = 0.0f; [L102] CALL, EXPR __ieee754_sqrtf(x) [L15] float z; [L16] __uint32_t r, hx; [L17] __int32_t ix, s, q, m, t, i; [L20] ieee_float_shape_type gf_u; [L21] gf_u.value = (x) [L22] EXPR gf_u.word [L22] (ix) = gf_u.word [L24] hx = ix & 0x7fffffff [L26] COND TRUE !((hx) < 0x7f800000L) [L27] return x * x + x; [L102] RET, EXPR __ieee754_sqrtf(x) [L102] float res = __ieee754_sqrtf(x); [L105] EXPR res == 0.0f && __signbit_float(res) == 0 [L105] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L106] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 50 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 55 SDtfs, 50 SDslu, 5 SDs, 0 SdLazy, 60 SolverSat, 11 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, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred 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, 35 NumberOfCodeBlocks, 35 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 16 ConstructedInterpolants, 0 QuantifiedInterpolants, 688 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...