/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/float-newlib/double_req_bl_1252b.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 06:11:41,074 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 06:11:41,077 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 06:11:41,121 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 06:11:41,122 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 06:11:41,123 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 06:11:41,125 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 06:11:41,128 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 06:11:41,131 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 06:11:41,132 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 06:11:41,134 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 06:11:41,135 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 06:11:41,136 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 06:11:41,137 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 06:11:41,142 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 06:11:41,144 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 06:11:41,145 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 06:11:41,146 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 06:11:41,149 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 06:11:41,152 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 06:11:41,154 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 06:11:41,158 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 06:11:41,163 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 06:11:41,165 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 06:11:41,191 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 06:11:41,209 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 06:11:41,213 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 06:11:41,214 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 06:11:41,215 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 06:11:41,270 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 06:11:41,271 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 06:11:41,277 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 06:11:41,277 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 06:11:41,277 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 06:11:41,277 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 06:11:41,278 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 06:11:41,278 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 06:11:41,278 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 06:11:41,278 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 06:11:41,278 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 06:11:41,279 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 06:11:41,279 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 06:11:41,279 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 06:11:41,279 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 06:11:41,279 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 06:11:41,280 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 06:11:41,280 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:11:41,283 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 06:11:41,283 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 06:11:41,283 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 06:11:41,284 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 06:11:41,284 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 06:11:41,284 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 06:11:41,284 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 06:11:41,284 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 06:11:41,654 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 06:11:41,692 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 06:11:41,695 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 06:11:41,697 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 06:11:41,698 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 06:11:41,699 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/double_req_bl_1252b.c [2020-12-23 06:11:41,794 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/6d3a23445/e6ade47173034a15b35c31dc920ba67c/FLAGe02d1e801 [2020-12-23 06:11:42,439 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 06:11:42,439 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/float-newlib/double_req_bl_1252b.c [2020-12-23 06:11:42,451 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/6d3a23445/e6ade47173034a15b35c31dc920ba67c/FLAGe02d1e801 [2020-12-23 06:11:42,782 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/6d3a23445/e6ade47173034a15b35c31dc920ba67c [2020-12-23 06:11:42,793 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 06:11:42,797 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 06:11:42,801 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 06:11:42,801 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 06:11:42,805 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 06:11:42,806 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:11:42" (1/1) ... [2020-12-23 06:11:42,808 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c1f75bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:11:42, skipping insertion in model container [2020-12-23 06:11:42,808 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:11:42" (1/1) ... [2020-12-23 06:11:42,817 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 06:11:42,839 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: StructLHS[VariableLHS[~ew_u~0,],value] left hand side expression in assignment: lhs: VariableLHS[~msw~0,] left hand side expression in assignment: lhs: VariableLHS[~lsw~0,] left hand side expression in assignment: lhs: StructLHS[VariableLHS[~gh_u~0,],value] left hand side expression in assignment: lhs: VariableLHS[~msw~1,] [2020-12-23 06:11:43,013 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/float-newlib/double_req_bl_1252b.c[2154,2167] [2020-12-23 06:11:43,016 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:11:43,027 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#ew_u~0,],base],StructAccessExpression[IdentifierExpression[~#ew_u~0,],offset]]] left hand side expression in assignment: lhs: VariableLHS[~msw~0,] left hand side expression in assignment: lhs: VariableLHS[~lsw~0,] left hand side expression in assignment: address: StructConstructor[[base,offset],[StructAccessExpression[IdentifierExpression[~#gh_u~0,],base],StructAccessExpression[IdentifierExpression[~#gh_u~0,],offset]]] left hand side expression in assignment: lhs: VariableLHS[~msw~1,] [2020-12-23 06:11:43,057 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/float-newlib/double_req_bl_1252b.c[2154,2167] [2020-12-23 06:11:43,058 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:11:43,077 INFO L208 MainTranslator]: Completed translation [2020-12-23 06:11:43,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:11:43 WrapperNode [2020-12-23 06:11:43,078 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 06:11:43,079 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 06:11:43,079 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 06:11:43,079 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 06:11:43,089 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:11:43" (1/1) ... [2020-12-23 06:11:43,100 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:11:43" (1/1) ... [2020-12-23 06:11:43,128 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 06:11:43,129 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 06:11:43,129 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 06:11:43,129 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 06:11:43,139 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:11:43" (1/1) ... [2020-12-23 06:11:43,140 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:11:43" (1/1) ... [2020-12-23 06:11:43,143 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:11:43" (1/1) ... [2020-12-23 06:11:43,143 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:11:43" (1/1) ... [2020-12-23 06:11:43,151 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:11:43" (1/1) ... [2020-12-23 06:11:43,157 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:11:43" (1/1) ... [2020-12-23 06:11:43,159 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:11:43" (1/1) ... [2020-12-23 06:11:43,162 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 06:11:43,164 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 06:11:43,164 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 06:11:43,164 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 06:11:43,165 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:11:43" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2020-12-23 06:11:43,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 06:11:43,278 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 06:11:43,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-12-23 06:11:43,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 06:11:43,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 06:11:43,279 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-23 06:11:43,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 06:11:43,856 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 06:11:43,856 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2020-12-23 06:11:43,858 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:11:43 BoogieIcfgContainer [2020-12-23 06:11:43,859 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 06:11:43,861 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 06:11:43,861 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 06:11:43,865 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 06:11:43,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 06:11:42" (1/3) ... [2020-12-23 06:11:43,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2aa5cdf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:11:43, skipping insertion in model container [2020-12-23 06:11:43,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:11:43" (2/3) ... [2020-12-23 06:11:43,867 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2aa5cdf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:11:43, skipping insertion in model container [2020-12-23 06:11:43,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:11:43" (3/3) ... [2020-12-23 06:11:43,869 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1252b.c [2020-12-23 06:11:43,877 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 06:11:43,883 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 06:11:43,905 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 06:11:43,939 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 06:11:43,940 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 06:11:43,940 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 06:11:43,940 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 06:11:43,940 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 06:11:43,941 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 06:11:43,941 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 06:11:43,941 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 06:11:43,958 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-12-23 06:11:43,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 06:11:43,965 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:11:43,966 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:11:43,966 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:11:43,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:11:43,973 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2020-12-23 06:11:43,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:11:43,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205822262] [2020-12-23 06:11:43,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:11:44,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:11:44,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:11:44,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205822262] [2020-12-23 06:11:44,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:11:44,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 06:11:44,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505022612] [2020-12-23 06:11:44,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-23 06:11:44,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:11:44,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-23 06:11:44,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 06:11:44,180 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2020-12-23 06:11:44,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:11:44,202 INFO L93 Difference]: Finished difference Result 62 states and 98 transitions. [2020-12-23 06:11:44,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-23 06:11:44,204 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-12-23 06:11:44,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:11:44,215 INFO L225 Difference]: With dead ends: 62 [2020-12-23 06:11:44,215 INFO L226 Difference]: Without dead ends: 29 [2020-12-23 06:11:44,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-23 06:11:44,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-23 06:11:44,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-12-23 06:11:44,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-23 06:11:44,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2020-12-23 06:11:44,262 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2020-12-23 06:11:44,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:11:44,263 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2020-12-23 06:11:44,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-23 06:11:44,263 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2020-12-23 06:11:44,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 06:11:44,264 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:11:44,264 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:11:44,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 06:11:44,265 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:11:44,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:11:44,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2020-12-23 06:11:44,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:11:44,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884172234] [2020-12-23 06:11:44,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:11:44,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:11:44,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:11:44,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884172234] [2020-12-23 06:11:44,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:11:44,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 06:11:44,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608861675] [2020-12-23 06:11:44,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 06:11:44,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:11:44,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 06:11:44,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 06:11:44,435 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 4 states. [2020-12-23 06:11:44,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:11:44,533 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2020-12-23 06:11:44,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 06:11:44,534 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-23 06:11:44,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:11:44,535 INFO L225 Difference]: With dead ends: 53 [2020-12-23 06:11:44,536 INFO L226 Difference]: Without dead ends: 44 [2020-12-23 06:11:44,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:11:44,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-23 06:11:44,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2020-12-23 06:11:44,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 06:11:44,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-12-23 06:11:44,545 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2020-12-23 06:11:44,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:11:44,545 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-12-23 06:11:44,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 06:11:44,545 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-12-23 06:11:44,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 06:11:44,546 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:11:44,546 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:11:44,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 06:11:44,547 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:11:44,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:11:44,548 INFO L82 PathProgramCache]: Analyzing trace with hash 502201410, now seen corresponding path program 1 times [2020-12-23 06:11:44,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:11:44,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522939739] [2020-12-23 06:11:44,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:11:44,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:11:44,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:11:44,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522939739] [2020-12-23 06:11:44,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:11:44,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 06:11:44,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918898233] [2020-12-23 06:11:44,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 06:11:44,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:11:44,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 06:11:44,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 06:11:44,608 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-12-23 06:11:44,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:11:44,686 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2020-12-23 06:11:44,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 06:11:44,687 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-12-23 06:11:44,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:11:44,688 INFO L225 Difference]: With dead ends: 55 [2020-12-23 06:11:44,689 INFO L226 Difference]: Without dead ends: 46 [2020-12-23 06:11:44,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:11:44,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-23 06:11:44,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2020-12-23 06:11:44,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 06:11:44,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-12-23 06:11:44,696 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 12 [2020-12-23 06:11:44,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:11:44,697 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-12-23 06:11:44,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 06:11:44,697 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-12-23 06:11:44,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 06:11:44,698 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:11:44,698 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:11:44,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 06:11:44,698 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:11:44,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:11:44,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1951233721, now seen corresponding path program 1 times [2020-12-23 06:11:44,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:11:44,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360663602] [2020-12-23 06:11:44,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:11:44,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:11:44,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:11:44,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360663602] [2020-12-23 06:11:44,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:11:44,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 06:11:44,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330646695] [2020-12-23 06:11:44,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 06:11:44,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:11:44,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 06:11:44,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 06:11:44,774 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-12-23 06:11:44,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:11:44,870 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2020-12-23 06:11:44,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 06:11:44,871 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-12-23 06:11:44,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:11:44,872 INFO L225 Difference]: With dead ends: 57 [2020-12-23 06:11:44,872 INFO L226 Difference]: Without dead ends: 48 [2020-12-23 06:11:44,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:11:44,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-23 06:11:44,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 31. [2020-12-23 06:11:44,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 06:11:44,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-12-23 06:11:44,880 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 13 [2020-12-23 06:11:44,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:11:44,880 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-12-23 06:11:44,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 06:11:44,880 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-12-23 06:11:44,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 06:11:44,881 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:11:44,881 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:11:44,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 06:11:44,882 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:11:44,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:11:44,883 INFO L82 PathProgramCache]: Analyzing trace with hash -555760345, now seen corresponding path program 1 times [2020-12-23 06:11:44,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:11:44,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603178292] [2020-12-23 06:11:44,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:11:44,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:11:44,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:11:44,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603178292] [2020-12-23 06:11:44,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:11:44,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 06:11:44,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646187402] [2020-12-23 06:11:44,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 06:11:44,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:11:44,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 06:11:44,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 06:11:44,941 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-12-23 06:11:45,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:11:45,012 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2020-12-23 06:11:45,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 06:11:45,013 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-12-23 06:11:45,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:11:45,014 INFO L225 Difference]: With dead ends: 55 [2020-12-23 06:11:45,014 INFO L226 Difference]: Without dead ends: 46 [2020-12-23 06:11:45,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:11:45,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-23 06:11:45,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2020-12-23 06:11:45,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-12-23 06:11:45,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-12-23 06:11:45,021 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 14 [2020-12-23 06:11:45,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:11:45,021 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-12-23 06:11:45,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 06:11:45,021 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-12-23 06:11:45,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 06:11:45,022 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:11:45,022 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:11:45,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-23 06:11:45,023 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:11:45,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:11:45,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2020-12-23 06:11:45,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:11:45,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370028953] [2020-12-23 06:11:45,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:11:45,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 06:11:45,052 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 06:11:45,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-23 06:11:45,078 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-23 06:11:45,106 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-23 06:11:45,106 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-23 06:11:45,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-23 06:11:45,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.12 06:11:45 BoogieIcfgContainer [2020-12-23 06:11:45,157 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-23 06:11:45,158 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-23 06:11:45,159 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-23 06:11:45,159 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-23 06:11:45,160 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:11:43" (3/4) ... [2020-12-23 06:11:45,164 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-23 06:11:45,165 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-23 06:11:45,168 INFO L168 Benchmark]: Toolchain (without parser) took 2370.09 ms. Allocated memory is still 164.6 MB. Free memory was 139.7 MB in the beginning and 74.1 MB in the end (delta: 65.6 MB). Peak memory consumption was 65.3 MB. Max. memory is 8.0 GB. [2020-12-23 06:11:45,169 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 164.6 MB. Free memory is still 137.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 06:11:45,170 INFO L168 Benchmark]: CACSL2BoogieTranslator took 277.50 ms. Allocated memory is still 164.6 MB. Free memory was 139.6 MB in the beginning and 129.0 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-12-23 06:11:45,171 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.29 ms. Allocated memory is still 164.6 MB. Free memory was 129.0 MB in the beginning and 127.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-23 06:11:45,172 INFO L168 Benchmark]: Boogie Preprocessor took 33.72 ms. Allocated memory is still 164.6 MB. Free memory was 127.2 MB in the beginning and 125.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-23 06:11:45,172 INFO L168 Benchmark]: RCFGBuilder took 695.38 ms. Allocated memory is still 164.6 MB. Free memory was 125.6 MB in the beginning and 140.1 MB in the end (delta: -14.6 MB). Peak memory consumption was 16.0 MB. Max. memory is 8.0 GB. [2020-12-23 06:11:45,173 INFO L168 Benchmark]: TraceAbstraction took 1296.12 ms. Allocated memory is still 164.6 MB. Free memory was 140.1 MB in the beginning and 74.1 MB in the end (delta: 66.1 MB). Peak memory consumption was 66.1 MB. Max. memory is 8.0 GB. [2020-12-23 06:11:45,174 INFO L168 Benchmark]: Witness Printer took 7.10 ms. Allocated memory is still 164.6 MB. Free memory is still 74.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-23 06:11:45,178 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 164.6 MB. Free memory is still 137.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 277.50 ms. Allocated memory is still 164.6 MB. Free memory was 139.6 MB in the beginning and 129.0 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 49.29 ms. Allocated memory is still 164.6 MB. Free memory was 129.0 MB in the beginning and 127.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 33.72 ms. Allocated memory is still 164.6 MB. Free memory was 127.2 MB in the beginning and 125.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 695.38 ms. Allocated memory is still 164.6 MB. Free memory was 125.6 MB in the beginning and 140.1 MB in the end (delta: -14.6 MB). Peak memory consumption was 16.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1296.12 ms. Allocated memory is still 164.6 MB. Free memory was 140.1 MB in the beginning and 74.1 MB in the end (delta: 66.1 MB). Peak memory consumption was 66.1 MB. Max. memory is 8.0 GB. * Witness Printer took 7.10 ms. Allocated memory is still 164.6 MB. Free memory is still 74.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 87]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 86, overapproximation of someUnaryDOUBLEoperation at line 82. Possible FailurePath: [L81] double x = 0.0; [L82] double y = -0.0; [L26] __uint32_t msw, lsw; [L29] ieee_double_shape_type ew_u; [L30] ew_u.value = (x) [L31] EXPR ew_u.parts.msw [L31] (msw) = ew_u.parts.msw [L32] EXPR ew_u.parts.lsw [L32] (lsw) = ew_u.parts.lsw [L35-L36] COND FALSE !((msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000)) [L38-L39] COND FALSE !((msw >= 0x00100000 && msw <= 0x7fefffff) || (msw >= 0x80100000 && msw <= 0xffefffff)) [L41-L42] COND FALSE !(( msw <= 0x000fffff) || (msw >= 0x80000000 && msw <= 0x800fffff)) [L45-L46] COND FALSE !((msw == 0x7ff00000 && lsw == 0x00000000) || (msw == 0xfff00000 && lsw == 0x00000000)) [L49] return 0; [L54] COND TRUE __fpclassify_double(x) == 0 [L55] return y; [L83] double res = fmax_double(x, y); [L86] EXPR res == 0.0 && __signbit_double(res) == 0 [L86] COND TRUE !(res == 0.0 && __signbit_double(res) == 0) [L87] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.1s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 251 SDtfs, 64 SDslu, 298 SDs, 0 SdLazy, 84 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 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, 5 MinimizatonAttempts, 60 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 74 NumberOfCodeBlocks, 74 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 55 ConstructedInterpolants, 0 QuantifiedInterpolants, 799 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 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...