/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 interpolation-heuristic=FIRST --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_1011b.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 14:52:47,760 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 14:52:47,763 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 14:52:47,788 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 14:52:47,788 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 14:52:47,789 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 14:52:47,791 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 14:52:47,792 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 14:52:47,794 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 14:52:47,795 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 14:52:47,796 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 14:52:47,797 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 14:52:47,797 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 14:52:47,798 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 14:52:47,799 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 14:52:47,801 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 14:52:47,801 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 14:52:47,802 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 14:52:47,804 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 14:52:47,806 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 14:52:47,807 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 14:52:47,808 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 14:52:47,809 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 14:52:47,810 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 14:52:47,813 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 14:52:47,813 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 14:52:47,813 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 14:52:47,814 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 14:52:47,814 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 14:52:47,815 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-21 14:52:47,820 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 14:52:47,821 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 14:52:47,822 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 14:52:47,823 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 14:52:47,865 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 14:52:47,865 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 14:52:47,867 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 14:52:47,868 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 14:52:47,868 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 14:52:47,868 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 14:52:47,868 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 14:52:47,868 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 14:52:47,869 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 14:52:47,869 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 14:52:47,869 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 14:52:47,869 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 14:52:47,870 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 14:52:47,870 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 14:52:47,870 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 14:52:47,870 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 14:52:47,870 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 14:52:47,871 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 14:52:47,873 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 14:52:47,873 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 14:52:47,873 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 14:52:47,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 14:52:47,873 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 14:52:47,874 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 14:52:47,874 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 14:52:47,874 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 14:52:47,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 14:52:47,874 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 14:52:47,875 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 14:52:47,875 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 -> interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> interpolation-heuristic=FIRST;log-additional-information=true; [2020-08-21 14:52:48,220 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 14:52:48,242 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 14:52:48,250 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 14:52:48,252 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 14:52:48,253 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 14:52:48,254 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1011b.c [2020-08-21 14:52:48,324 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b0c8a0e1c/c1f75ba1d9f14aeca5d27265642b5dea/FLAGd7574100a [2020-08-21 14:52:48,810 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 14:52:48,812 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_1011b.c [2020-08-21 14:52:48,820 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b0c8a0e1c/c1f75ba1d9f14aeca5d27265642b5dea/FLAGd7574100a [2020-08-21 14:52:49,159 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b0c8a0e1c/c1f75ba1d9f14aeca5d27265642b5dea [2020-08-21 14:52:49,170 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 14:52:49,172 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 14:52:49,175 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 14:52:49,175 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 14:52:49,179 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 14:52:49,180 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:52:49" (1/1) ... [2020-08-21 14:52:49,185 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41c7bf19 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:52:49, skipping insertion in model container [2020-08-21 14:52:49,185 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:52:49" (1/1) ... [2020-08-21 14:52:49,194 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 14:52:49,215 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 14:52:49,405 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:52:49,412 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 14:52:49,434 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:52:49,458 INFO L208 MainTranslator]: Completed translation [2020-08-21 14:52:49,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:52:49 WrapperNode [2020-08-21 14:52:49,459 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 14:52:49,459 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 14:52:49,460 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 14:52:49,460 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 14:52:49,559 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:52:49" (1/1) ... [2020-08-21 14:52:49,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:52:49" (1/1) ... [2020-08-21 14:52:49,569 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:52:49" (1/1) ... [2020-08-21 14:52:49,569 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:52:49" (1/1) ... [2020-08-21 14:52:49,579 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:52:49" (1/1) ... [2020-08-21 14:52:49,584 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:52:49" (1/1) ... [2020-08-21 14:52:49,586 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:52:49" (1/1) ... [2020-08-21 14:52:49,588 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 14:52:49,589 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 14:52:49,589 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 14:52:49,589 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 14:52:49,590 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:52:49" (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 14:52:49,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 14:52:49,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 14:52:49,653 INFO L138 BoogieDeclarations]: Found implementation of procedure fabs_float [2020-08-21 14:52:49,653 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-08-21 14:52:49,653 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 14:52:49,653 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 14:52:49,654 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-08-21 14:52:49,654 INFO L130 BoogieDeclarations]: Found specification of procedure fabs_float [2020-08-21 14:52:49,654 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 14:52:49,654 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-08-21 14:52:49,654 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 14:52:49,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 14:52:49,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 14:52:49,655 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-08-21 14:52:49,655 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-08-21 14:52:49,655 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 14:52:49,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 14:52:49,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 14:52:49,936 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 14:52:49,936 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-08-21 14:52:49,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:52:49 BoogieIcfgContainer [2020-08-21 14:52:49,941 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 14:52:49,944 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 14:52:49,944 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 14:52:49,947 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 14:52:49,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 02:52:49" (1/3) ... [2020-08-21 14:52:49,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6184018 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:52:49, skipping insertion in model container [2020-08-21 14:52:49,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:52:49" (2/3) ... [2020-08-21 14:52:49,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6184018 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:52:49, skipping insertion in model container [2020-08-21 14:52:49,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:52:49" (3/3) ... [2020-08-21 14:52:49,952 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1011b.c [2020-08-21 14:52:49,965 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 14:52:49,975 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 14:52:49,993 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 14:52:50,024 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 14:52:50,024 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 14:52:50,024 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 14:52:50,024 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 14:52:50,024 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 14:52:50,025 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 14:52:50,025 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 14:52:50,025 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 14:52:50,044 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-08-21 14:52:50,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-21 14:52:50,051 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:52:50,052 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 14:52:50,053 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:52:50,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:52:50,063 INFO L82 PathProgramCache]: Analyzing trace with hash -2014572178, now seen corresponding path program 1 times [2020-08-21 14:52:50,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:52:50,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1919249062] [2020-08-21 14:52:50,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:52:50,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:52:50,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:52:50,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:52:50,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-21 14:52:50,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:52:50,324 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 14:52:50,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1919249062] [2020-08-21 14:52:50,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:52:50,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 14:52:50,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925264468] [2020-08-21 14:52:50,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 14:52:50,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:52:50,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 14:52:50,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 14:52:50,347 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 4 states. [2020-08-21 14:52:50,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:52:50,520 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2020-08-21 14:52:50,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 14:52:50,523 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-08-21 14:52:50,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:52:50,533 INFO L225 Difference]: With dead ends: 56 [2020-08-21 14:52:50,533 INFO L226 Difference]: Without dead ends: 28 [2020-08-21 14:52:50,537 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 [2020-08-21 14:52:50,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-21 14:52:50,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-08-21 14:52:50,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-21 14:52:50,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-08-21 14:52:50,583 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 17 [2020-08-21 14:52:50,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:52:50,584 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-08-21 14:52:50,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 14:52:50,584 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-08-21 14:52:50,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 14:52:50,585 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:52:50,586 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:52:50,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 14:52:50,586 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:52:50,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:52:50,587 INFO L82 PathProgramCache]: Analyzing trace with hash 516358161, now seen corresponding path program 1 times [2020-08-21 14:52:50,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:52:50,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306708694] [2020-08-21 14:52:50,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:52:50,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 14:52:50,632 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 14:52:50,632 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 14:52:50,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 14:52:50,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 02:52:50 BoogieIcfgContainer [2020-08-21 14:52:50,666 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 14:52:50,669 INFO L168 Benchmark]: Toolchain (without parser) took 1495.87 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 103.6 MB in the beginning and 124.9 MB in the end (delta: -21.3 MB). Peak memory consumption was 41.1 MB. Max. memory is 7.1 GB. [2020-08-21 14:52:50,673 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-08-21 14:52:50,674 INFO L168 Benchmark]: CACSL2BoogieTranslator took 284.34 ms. Allocated memory is still 140.5 MB. Free memory was 103.4 MB in the beginning and 92.6 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2020-08-21 14:52:50,676 INFO L168 Benchmark]: Boogie Preprocessor took 129.26 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 92.4 MB in the beginning and 180.2 MB in the end (delta: -87.8 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-08-21 14:52:50,677 INFO L168 Benchmark]: RCFGBuilder took 352.39 ms. Allocated memory is still 202.9 MB. Free memory was 180.2 MB in the beginning and 163.1 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. [2020-08-21 14:52:50,678 INFO L168 Benchmark]: TraceAbstraction took 722.28 ms. Allocated memory is still 202.9 MB. Free memory was 162.5 MB in the beginning and 124.9 MB in the end (delta: 37.6 MB). Peak memory consumption was 37.6 MB. Max. memory is 7.1 GB. [2020-08-21 14:52:50,690 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 284.34 ms. Allocated memory is still 140.5 MB. Free memory was 103.4 MB in the beginning and 92.6 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 129.26 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 92.4 MB in the beginning and 180.2 MB in the end (delta: -87.8 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 352.39 ms. Allocated memory is still 202.9 MB. Free memory was 180.2 MB in the beginning and 163.1 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 722.28 ms. Allocated memory is still 202.9 MB. Free memory was 162.5 MB in the beginning and 124.9 MB in the end (delta: 37.6 MB). Peak memory consumption was 37.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 50]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 49, overapproximation of someUnaryFLOAToperation at line 45, overapproximation of bitwiseAnd at line 21. Possible FailurePath: [L45] float x = -0.0f; [L46] CALL, EXPR fabs_float(x) [L13] __uint32_t ix; [L15] ieee_float_shape_type gf_u; [L16] gf_u.value = (x) [L17] EXPR gf_u.word [L17] (ix) = gf_u.word [L20] ieee_float_shape_type sf_u; [L21] sf_u.word = (ix & 0x7fffffff) [L22] EXPR sf_u.value [L22] (x) = sf_u.value [L24] return x; [L46] RET, EXPR fabs_float(x) [L46] float res = fabs_float(x); [L49] EXPR res == 0.0f && __signbit_float(res) == 0 [L49] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L50] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 26 SDtfs, 21 SDslu, 5 SDs, 0 SdLazy, 31 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 36 NumberOfCodeBlocks, 36 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 16 ConstructedInterpolants, 0 QuantifiedInterpolants, 592 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...