./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-newlib/float_req_bl_1232b.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/float-newlib/float_req_bl_1232b.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 38561929b5142acce65cab4da64e7c4ae5f17524 .............................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/float-newlib/float_req_bl_1232b.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 38561929b5142acce65cab4da64e7c4ae5f17524 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 00:40:21,090 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:40:21,092 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:40:21,117 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:40:21,118 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:40:21,119 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:40:21,120 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:40:21,122 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:40:21,124 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:40:21,125 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:40:21,126 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:40:21,127 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:40:21,127 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:40:21,129 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:40:21,130 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:40:21,139 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:40:21,142 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:40:21,145 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:40:21,146 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:40:21,149 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:40:21,153 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:40:21,158 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:40:21,159 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:40:21,162 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:40:21,167 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:40:21,168 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:40:21,168 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:40:21,170 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:40:21,171 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:40:21,172 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:40:21,172 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:40:21,174 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:40:21,175 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:40:21,176 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:40:21,178 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:40:21,178 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:40:21,179 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:40:21,179 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:40:21,179 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:40:21,180 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:40:21,182 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:40:21,183 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 00:40:21,236 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:40:21,239 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:40:21,240 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:40:21,241 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:40:21,242 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:40:21,242 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:40:21,242 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:40:21,243 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 00:40:21,243 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:40:21,243 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:40:21,244 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:40:21,244 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:40:21,245 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:40:21,245 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:40:21,245 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:40:21,246 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:40:21,246 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:40:21,246 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:40:21,246 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:40:21,247 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:40:21,247 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:40:21,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:40:21,247 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:40:21,248 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:40:21,248 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:40:21,248 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 00:40:21,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 00:40:21,249 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:40:21,249 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:40:21,249 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 38561929b5142acce65cab4da64e7c4ae5f17524 [2020-10-20 00:40:21,477 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:40:21,492 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:40:21,497 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:40:21,499 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:40:21,499 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:40:21,500 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/float_req_bl_1232b.c [2020-10-20 00:40:21,570 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6cd5dd30b/2cd55227f5de4f81bbaf3a711d70268a/FLAG3dde87733 [2020-10-20 00:40:22,025 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:40:22,026 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/float_req_bl_1232b.c [2020-10-20 00:40:22,035 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6cd5dd30b/2cd55227f5de4f81bbaf3a711d70268a/FLAG3dde87733 [2020-10-20 00:40:22,368 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6cd5dd30b/2cd55227f5de4f81bbaf3a711d70268a [2020-10-20 00:40:22,372 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:40:22,380 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:40:22,381 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:40:22,382 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:40:22,385 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:40:22,387 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:40:22" (1/1) ... [2020-10-20 00:40:22,392 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25442f6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:22, skipping insertion in model container [2020-10-20 00:40:22,392 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:40:22" (1/1) ... [2020-10-20 00:40:22,400 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:40:22,422 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:40:22,677 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:40:22,688 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:40:22,715 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:40:22,731 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:40:22,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:22 WrapperNode [2020-10-20 00:40:22,732 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:40:22,733 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:40:22,733 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:40:22,733 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:40:22,740 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:22" (1/1) ... [2020-10-20 00:40:22,750 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:22" (1/1) ... [2020-10-20 00:40:22,775 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:40:22,775 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:40:22,775 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:40:22,775 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:40:22,784 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:22" (1/1) ... [2020-10-20 00:40:22,784 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:22" (1/1) ... [2020-10-20 00:40:22,787 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:22" (1/1) ... [2020-10-20 00:40:22,788 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:22" (1/1) ... [2020-10-20 00:40:22,796 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:22" (1/1) ... [2020-10-20 00:40:22,802 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:22" (1/1) ... [2020-10-20 00:40:22,804 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:22" (1/1) ... [2020-10-20 00:40:22,807 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:40:22,807 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:40:22,808 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:40:22,808 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:40:22,809 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-10-20 00:40:22,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 00:40:22,887 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:40:22,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-20 00:40:22,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:40:22,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:40:22,888 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-20 00:40:22,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 00:40:23,250 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:40:23,251 INFO L298 CfgBuilder]: Removed 20 assume(true) statements. [2020-10-20 00:40:23,253 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:40:23 BoogieIcfgContainer [2020-10-20 00:40:23,254 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:40:23,256 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:40:23,256 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:40:23,260 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:40:23,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:40:22" (1/3) ... [2020-10-20 00:40:23,262 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ab823c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:40:23, skipping insertion in model container [2020-10-20 00:40:23,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:22" (2/3) ... [2020-10-20 00:40:23,263 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ab823c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:40:23, skipping insertion in model container [2020-10-20 00:40:23,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:40:23" (3/3) ... [2020-10-20 00:40:23,287 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1232b.c [2020-10-20 00:40:23,301 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:40:23,309 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:40:23,327 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:40:23,355 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:40:23,355 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:40:23,356 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:40:23,356 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:40:23,356 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:40:23,356 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:40:23,357 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:40:23,357 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:40:23,376 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-20 00:40:23,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-20 00:40:23,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:23,387 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:23,388 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:23,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:23,394 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2020-10-20 00:40:23,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:40:23,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620822138] [2020-10-20 00:40:23,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:40:23,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:23,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:23,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620822138] [2020-10-20 00:40:23,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:23,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 00:40:23,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553472083] [2020-10-20 00:40:23,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 00:40:23,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:40:23,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 00:40:23,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:40:23,584 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-10-20 00:40:23,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:23,610 INFO L93 Difference]: Finished difference Result 63 states and 99 transitions. [2020-10-20 00:40:23,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 00:40:23,611 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-20 00:40:23,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:23,624 INFO L225 Difference]: With dead ends: 63 [2020-10-20 00:40:23,625 INFO L226 Difference]: Without dead ends: 29 [2020-10-20 00:40:23,629 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 [2020-10-20 00:40:23,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-20 00:40:23,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-20 00:40:23,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-20 00:40:23,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2020-10-20 00:40:23,693 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2020-10-20 00:40:23,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:23,694 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2020-10-20 00:40:23,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 00:40:23,694 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2020-10-20 00:40:23,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 00:40:23,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:23,696 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:23,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 00:40:23,697 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:23,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:23,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2020-10-20 00:40:23,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:40:23,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626440237] [2020-10-20 00:40:23,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:40:23,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:23,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:23,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626440237] [2020-10-20 00:40:23,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:23,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 00:40:23,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436317218] [2020-10-20 00:40:23,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:40:23,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:40:23,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:40:23,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:40:23,816 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 4 states. [2020-10-20 00:40:23,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:23,919 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2020-10-20 00:40:23,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:40:23,920 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-10-20 00:40:23,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:23,922 INFO L225 Difference]: With dead ends: 53 [2020-10-20 00:40:23,922 INFO L226 Difference]: Without dead ends: 44 [2020-10-20 00:40:23,923 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 [2020-10-20 00:40:23,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-20 00:40:23,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2020-10-20 00:40:23,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-20 00:40:23,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-10-20 00:40:23,931 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2020-10-20 00:40:23,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:23,931 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-10-20 00:40:23,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:40:23,931 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-10-20 00:40:23,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-20 00:40:23,932 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:23,932 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:23,933 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 00:40:23,933 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:23,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:23,933 INFO L82 PathProgramCache]: Analyzing trace with hash 502201410, now seen corresponding path program 1 times [2020-10-20 00:40:23,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:40:23,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917941832] [2020-10-20 00:40:23,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:40:23,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:23,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:23,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917941832] [2020-10-20 00:40:23,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:23,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 00:40:23,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026795932] [2020-10-20 00:40:23,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:40:23,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:40:23,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:40:23,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:40:23,995 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-10-20 00:40:24,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:24,066 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2020-10-20 00:40:24,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:40:24,067 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-20 00:40:24,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:24,068 INFO L225 Difference]: With dead ends: 55 [2020-10-20 00:40:24,068 INFO L226 Difference]: Without dead ends: 46 [2020-10-20 00:40:24,069 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 [2020-10-20 00:40:24,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-20 00:40:24,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2020-10-20 00:40:24,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-20 00:40:24,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-10-20 00:40:24,075 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 12 [2020-10-20 00:40:24,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:24,075 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-10-20 00:40:24,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:40:24,075 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-10-20 00:40:24,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-20 00:40:24,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:24,076 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:24,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-20 00:40:24,077 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:24,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:24,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1951233721, now seen corresponding path program 1 times [2020-10-20 00:40:24,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:40:24,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041804752] [2020-10-20 00:40:24,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:40:24,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:24,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:24,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041804752] [2020-10-20 00:40:24,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:24,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 00:40:24,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820891842] [2020-10-20 00:40:24,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:40:24,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:40:24,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:40:24,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:40:24,174 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-10-20 00:40:24,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:24,272 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2020-10-20 00:40:24,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:40:24,273 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-20 00:40:24,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:24,274 INFO L225 Difference]: With dead ends: 57 [2020-10-20 00:40:24,274 INFO L226 Difference]: Without dead ends: 48 [2020-10-20 00:40:24,276 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 [2020-10-20 00:40:24,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-20 00:40:24,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 31. [2020-10-20 00:40:24,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-20 00:40:24,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-10-20 00:40:24,296 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 13 [2020-10-20 00:40:24,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:24,297 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-10-20 00:40:24,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:40:24,297 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-10-20 00:40:24,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-20 00:40:24,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:24,300 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:24,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-20 00:40:24,301 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:24,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:24,302 INFO L82 PathProgramCache]: Analyzing trace with hash -555760345, now seen corresponding path program 1 times [2020-10-20 00:40:24,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:40:24,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671787583] [2020-10-20 00:40:24,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:40:24,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:24,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:24,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671787583] [2020-10-20 00:40:24,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:24,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 00:40:24,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078895090] [2020-10-20 00:40:24,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:40:24,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:40:24,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:40:24,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:40:24,374 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-10-20 00:40:24,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:24,426 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2020-10-20 00:40:24,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:40:24,427 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-20 00:40:24,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:24,428 INFO L225 Difference]: With dead ends: 55 [2020-10-20 00:40:24,428 INFO L226 Difference]: Without dead ends: 46 [2020-10-20 00:40:24,429 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 [2020-10-20 00:40:24,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-20 00:40:24,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2020-10-20 00:40:24,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-20 00:40:24,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-10-20 00:40:24,435 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 14 [2020-10-20 00:40:24,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:24,435 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-10-20 00:40:24,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:40:24,436 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-10-20 00:40:24,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-20 00:40:24,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:24,437 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:24,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-20 00:40:24,438 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:24,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:24,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2020-10-20 00:40:24,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:40:24,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374657115] [2020-10-20 00:40:24,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:40:24,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:40:24,461 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:40:24,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:40:24,487 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:40:24,514 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 00:40:24,514 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 00:40:24,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-20 00:40:24,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:40:24 BoogieIcfgContainer [2020-10-20 00:40:24,552 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:40:24,553 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:40:24,553 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:40:24,553 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:40:24,554 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:40:23" (3/4) ... [2020-10-20 00:40:24,559 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-20 00:40:24,559 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:40:24,564 INFO L168 Benchmark]: Toolchain (without parser) took 2186.78 ms. Allocated memory was 36.2 MB in the beginning and 50.9 MB in the end (delta: 14.7 MB). Free memory was 14.8 MB in the beginning and 13.6 MB in the end (delta: 1.2 MB). Peak memory consumption was 15.9 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:24,565 INFO L168 Benchmark]: CDTParser took 0.73 ms. Allocated memory is still 33.6 MB. Free memory was 8.3 MB in the beginning and 8.3 MB in the end (delta: 62.9 kB). Peak memory consumption was 62.9 kB. Max. memory is 14.3 GB. [2020-10-20 00:40:24,566 INFO L168 Benchmark]: CACSL2BoogieTranslator took 351.24 ms. Allocated memory was 36.2 MB in the beginning and 45.1 MB in the end (delta: 8.9 MB). Free memory was 13.9 MB in the beginning and 25.4 MB in the end (delta: -11.4 MB). Peak memory consumption was 11.1 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:24,567 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.74 ms. Allocated memory is still 45.1 MB. Free memory was 25.4 MB in the beginning and 23.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:24,568 INFO L168 Benchmark]: Boogie Preprocessor took 31.98 ms. Allocated memory is still 45.1 MB. Free memory was 23.2 MB in the beginning and 21.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:24,570 INFO L168 Benchmark]: RCFGBuilder took 446.42 ms. Allocated memory was 45.1 MB in the beginning and 46.1 MB in the end (delta: 1.0 MB). Free memory was 21.5 MB in the beginning and 12.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:24,571 INFO L168 Benchmark]: TraceAbstraction took 1296.65 ms. Allocated memory was 46.1 MB in the beginning and 50.9 MB in the end (delta: 4.7 MB). Free memory was 11.6 MB in the beginning and 14.0 MB in the end (delta: -2.4 MB). Peak memory consumption was 2.3 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:24,571 INFO L168 Benchmark]: Witness Printer took 6.29 ms. Allocated memory is still 50.9 MB. Free memory was 14.0 MB in the beginning and 13.6 MB in the end (delta: 387.3 kB). Peak memory consumption was 387.3 kB. Max. memory is 14.3 GB. [2020-10-20 00:40:24,577 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.73 ms. Allocated memory is still 33.6 MB. Free memory was 8.3 MB in the beginning and 8.3 MB in the end (delta: 62.9 kB). Peak memory consumption was 62.9 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 351.24 ms. Allocated memory was 36.2 MB in the beginning and 45.1 MB in the end (delta: 8.9 MB). Free memory was 13.9 MB in the beginning and 25.4 MB in the end (delta: -11.4 MB). Peak memory consumption was 11.1 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 41.74 ms. Allocated memory is still 45.1 MB. Free memory was 25.4 MB in the beginning and 23.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 31.98 ms. Allocated memory is still 45.1 MB. Free memory was 23.2 MB in the beginning and 21.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. * RCFGBuilder took 446.42 ms. Allocated memory was 45.1 MB in the beginning and 46.1 MB in the end (delta: 1.0 MB). Free memory was 21.5 MB in the beginning and 12.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 14.3 GB. * TraceAbstraction took 1296.65 ms. Allocated memory was 46.1 MB in the beginning and 50.9 MB in the end (delta: 4.7 MB). Free memory was 11.6 MB in the beginning and 14.0 MB in the end (delta: -2.4 MB). Peak memory consumption was 2.3 MB. Max. memory is 14.3 GB. * Witness Printer took 6.29 ms. Allocated memory is still 50.9 MB. Free memory was 14.0 MB in the beginning and 13.6 MB in the end (delta: 387.3 kB). Peak memory consumption was 387.3 kB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 71, overapproximation of someUnaryFLOAToperation at line 66. Possible FailurePath: [L66] float x = -0.0f; [L67] float y = 0.0f; [L15] __uint32_t w; [L18] ieee_float_shape_type gf_u; [L19] gf_u.value = (x) [L20] EXPR gf_u.word [L20] (w) = gf_u.word [L23] COND FALSE !(w == 0x00000000 || w == 0x80000000) [L25-L26] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) [L28-L29] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) [L31] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L34] return 0; [L38] COND TRUE __fpclassify_float(x) == 0 [L39] return y; [L68] float res = fmin_float(x, y); [L71] EXPR res == -0.0f && __signbit_float(res) == 1 [L71] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) [L3] __assert_fail("0", "float_req_bl_1232b.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 33 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=33occurred 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... ### Bit-precise run ### This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 00:40:26,790 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:40:26,792 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:40:26,829 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:40:26,829 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:40:26,838 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:40:26,840 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:40:26,843 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:40:26,845 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:40:26,848 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:40:26,850 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:40:26,851 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:40:26,851 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:40:26,855 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:40:26,856 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:40:26,857 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:40:26,859 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:40:26,860 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:40:26,863 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:40:26,869 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:40:26,872 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:40:26,879 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:40:26,881 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:40:26,882 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:40:26,884 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:40:26,884 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:40:26,885 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:40:26,886 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:40:26,886 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:40:26,887 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:40:26,887 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:40:26,888 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:40:26,889 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:40:26,890 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:40:26,891 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:40:26,891 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:40:26,892 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:40:26,892 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:40:26,892 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:40:26,893 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:40:26,894 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:40:26,895 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-10-20 00:40:26,917 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:40:26,917 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:40:26,919 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:40:26,919 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:40:26,919 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:40:26,920 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:40:26,920 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:40:26,920 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:40:26,920 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:40:26,920 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:40:26,921 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:40:26,921 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:40:26,921 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-20 00:40:26,921 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-20 00:40:26,922 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:40:26,922 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:40:26,922 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:40:26,922 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:40:26,923 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:40:26,923 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:40:26,923 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:40:26,923 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:40:26,924 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:40:26,924 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:40:26,924 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:40:26,924 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:40:26,925 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-20 00:40:26,925 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-20 00:40:26,925 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:40:26,925 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:40:26,926 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-20 00:40:26,926 INFO L138 SettingsManager]: * Logic for external solver=AUFBV Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 38561929b5142acce65cab4da64e7c4ae5f17524 [2020-10-20 00:40:27,140 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:40:27,153 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:40:27,157 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:40:27,159 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:40:27,159 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:40:27,160 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/float_req_bl_1232b.c [2020-10-20 00:40:27,250 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9858a476/2b860fd2a2e0459b90982e7786c289d9/FLAG19f9dd72b [2020-10-20 00:40:27,827 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:40:27,828 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/float_req_bl_1232b.c [2020-10-20 00:40:27,835 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9858a476/2b860fd2a2e0459b90982e7786c289d9/FLAG19f9dd72b [2020-10-20 00:40:28,208 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e9858a476/2b860fd2a2e0459b90982e7786c289d9 [2020-10-20 00:40:28,212 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:40:28,219 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:40:28,220 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:40:28,221 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:40:28,224 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:40:28,225 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:40:28" (1/1) ... [2020-10-20 00:40:28,228 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f52be9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:28, skipping insertion in model container [2020-10-20 00:40:28,229 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:40:28" (1/1) ... [2020-10-20 00:40:28,238 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:40:28,261 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:40:28,598 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:40:28,618 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:40:28,676 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:40:28,705 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:40:28,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:28 WrapperNode [2020-10-20 00:40:28,706 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:40:28,708 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:40:28,709 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:40:28,710 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:40:28,720 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:28" (1/1) ... [2020-10-20 00:40:28,747 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:28" (1/1) ... [2020-10-20 00:40:28,791 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:40:28,791 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:40:28,792 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:40:28,792 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:40:28,802 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:28" (1/1) ... [2020-10-20 00:40:28,809 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:28" (1/1) ... [2020-10-20 00:40:28,820 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:28" (1/1) ... [2020-10-20 00:40:28,821 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:28" (1/1) ... [2020-10-20 00:40:28,843 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:28" (1/1) ... [2020-10-20 00:40:28,860 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:28" (1/1) ... [2020-10-20 00:40:28,865 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:28" (1/1) ... [2020-10-20 00:40:28,872 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:40:28,873 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:40:28,873 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:40:28,874 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:40:28,876 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:28" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-10-20 00:40:28,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-20 00:40:28,943 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:40:28,944 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-10-20 00:40:28,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:40:28,945 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:40:28,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2020-10-20 00:40:28,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 00:40:29,416 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:40:29,416 INFO L298 CfgBuilder]: Removed 20 assume(true) statements. [2020-10-20 00:40:29,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:40:29 BoogieIcfgContainer [2020-10-20 00:40:29,418 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:40:29,419 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:40:29,420 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:40:29,423 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:40:29,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:40:28" (1/3) ... [2020-10-20 00:40:29,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2878ac57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:40:29, skipping insertion in model container [2020-10-20 00:40:29,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:40:28" (2/3) ... [2020-10-20 00:40:29,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2878ac57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:40:29, skipping insertion in model container [2020-10-20 00:40:29,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:40:29" (3/3) ... [2020-10-20 00:40:29,427 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1232b.c [2020-10-20 00:40:29,438 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:40:29,446 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:40:29,458 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:40:29,479 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:40:29,480 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:40:29,480 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:40:29,480 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:40:29,480 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:40:29,480 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:40:29,480 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:40:29,481 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:40:29,495 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-20 00:40:29,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-20 00:40:29,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:29,501 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:29,502 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:29,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:29,507 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2020-10-20 00:40:29,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:40:29,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [661635497] [2020-10-20 00:40:29,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-10-20 00:40:29,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:29,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-20 00:40:29,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:40:29,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:29,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:40:29,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:29,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [661635497] [2020-10-20 00:40:29,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:29,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-20 00:40:29,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004864051] [2020-10-20 00:40:29,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 00:40:29,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:40:29,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 00:40:29,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:40:29,672 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-10-20 00:40:29,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:29,694 INFO L93 Difference]: Finished difference Result 63 states and 99 transitions. [2020-10-20 00:40:29,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 00:40:29,696 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-20 00:40:29,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:29,705 INFO L225 Difference]: With dead ends: 63 [2020-10-20 00:40:29,705 INFO L226 Difference]: Without dead ends: 29 [2020-10-20 00:40:29,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:40:29,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-20 00:40:29,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-20 00:40:29,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-20 00:40:29,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2020-10-20 00:40:29,743 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2020-10-20 00:40:29,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:29,743 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2020-10-20 00:40:29,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 00:40:29,744 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2020-10-20 00:40:29,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 00:40:29,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:29,745 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:29,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-20 00:40:29,957 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:29,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:29,958 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2020-10-20 00:40:29,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:40:29,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [8971595] [2020-10-20 00:40:29,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-10-20 00:40:30,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:30,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-20 00:40:30,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:40:30,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:30,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:40:30,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:30,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [8971595] [2020-10-20 00:40:30,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:30,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-10-20 00:40:30,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189520089] [2020-10-20 00:40:30,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 00:40:30,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:40:30,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 00:40:30,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-20 00:40:30,124 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 6 states. [2020-10-20 00:40:30,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:30,237 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2020-10-20 00:40:30,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 00:40:30,238 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-10-20 00:40:30,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:30,239 INFO L225 Difference]: With dead ends: 68 [2020-10-20 00:40:30,240 INFO L226 Difference]: Without dead ends: 59 [2020-10-20 00:40:30,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-20 00:40:30,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-20 00:40:30,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 31. [2020-10-20 00:40:30,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-20 00:40:30,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-10-20 00:40:30,249 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2020-10-20 00:40:30,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:30,250 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-10-20 00:40:30,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 00:40:30,250 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-10-20 00:40:30,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-20 00:40:30,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:30,251 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:30,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-20 00:40:30,477 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:30,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:30,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2020-10-20 00:40:30,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:40:30,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [620630882] [2020-10-20 00:40:30,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-10-20 00:40:30,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:30,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-20 00:40:30,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:40:30,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:30,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:40:30,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:30,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [620630882] [2020-10-20 00:40:30,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:30,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2020-10-20 00:40:30,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857455462] [2020-10-20 00:40:30,687 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:40:30,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:40:30,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:40:30,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:40:30,688 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-10-20 00:40:30,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:30,752 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2020-10-20 00:40:30,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:40:30,753 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-20 00:40:30,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:30,754 INFO L225 Difference]: With dead ends: 52 [2020-10-20 00:40:30,754 INFO L226 Difference]: Without dead ends: 26 [2020-10-20 00:40:30,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:40:30,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-20 00:40:30,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-20 00:40:30,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-20 00:40:30,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2020-10-20 00:40:30,761 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 14 [2020-10-20 00:40:30,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:30,761 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2020-10-20 00:40:30,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:40:30,762 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2020-10-20 00:40:30,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-20 00:40:30,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:30,763 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:30,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-20 00:40:30,982 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:30,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:30,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1012446717, now seen corresponding path program 1 times [2020-10-20 00:40:30,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:40:30,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1662171499] [2020-10-20 00:40:30,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-10-20 00:40:31,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:31,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-20 00:40:31,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:40:31,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:31,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:40:31,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:31,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1662171499] [2020-10-20 00:40:31,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:31,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-10-20 00:40:31,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741072554] [2020-10-20 00:40:31,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 00:40:31,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:40:31,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 00:40:31,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-20 00:40:31,103 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 6 states. [2020-10-20 00:40:31,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:31,180 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2020-10-20 00:40:31,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 00:40:31,181 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-20 00:40:31,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:31,182 INFO L225 Difference]: With dead ends: 61 [2020-10-20 00:40:31,182 INFO L226 Difference]: Without dead ends: 52 [2020-10-20 00:40:31,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-20 00:40:31,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-20 00:40:31,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 28. [2020-10-20 00:40:31,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-20 00:40:31,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2020-10-20 00:40:31,190 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 16 [2020-10-20 00:40:31,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:31,190 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2020-10-20 00:40:31,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 00:40:31,191 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2020-10-20 00:40:31,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-20 00:40:31,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:31,192 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:31,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-10-20 00:40:31,407 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:31,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:31,407 INFO L82 PathProgramCache]: Analyzing trace with hash -414082333, now seen corresponding path program 1 times [2020-10-20 00:40:31,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:40:31,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1371631378] [2020-10-20 00:40:31,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-10-20 00:40:31,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:31,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 00:40:31,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:40:31,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:31,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:40:31,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:31,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1371631378] [2020-10-20 00:40:31,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:31,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-10-20 00:40:31,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396003808] [2020-10-20 00:40:31,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:40:31,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:40:31,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:40:31,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:40:31,540 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 4 states. [2020-10-20 00:40:31,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:31,552 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2020-10-20 00:40:31,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 00:40:31,553 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-20 00:40:31,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:31,554 INFO L225 Difference]: With dead ends: 38 [2020-10-20 00:40:31,554 INFO L226 Difference]: Without dead ends: 28 [2020-10-20 00:40:31,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:40:31,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-20 00:40:31,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-20 00:40:31,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-20 00:40:31,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-10-20 00:40:31,560 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2020-10-20 00:40:31,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:31,560 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-10-20 00:40:31,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:40:31,561 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-10-20 00:40:31,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-20 00:40:31,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:31,562 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:31,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-10-20 00:40:31,774 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:31,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:31,775 INFO L82 PathProgramCache]: Analyzing trace with hash -356824031, now seen corresponding path program 1 times [2020-10-20 00:40:31,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:40:31,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1276680293] [2020-10-20 00:40:31,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-10-20 00:40:31,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:31,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-20 00:40:31,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:40:31,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:31,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:40:31,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:31,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1276680293] [2020-10-20 00:40:31,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:31,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2020-10-20 00:40:31,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517654242] [2020-10-20 00:40:31,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-20 00:40:31,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:40:31,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-20 00:40:31,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-20 00:40:31,975 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 9 states. [2020-10-20 00:40:32,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:32,083 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2020-10-20 00:40:32,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 00:40:32,084 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-10-20 00:40:32,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:32,085 INFO L225 Difference]: With dead ends: 40 [2020-10-20 00:40:32,085 INFO L226 Difference]: Without dead ends: 37 [2020-10-20 00:40:32,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-20 00:40:32,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-20 00:40:32,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2020-10-20 00:40:32,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-20 00:40:32,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-10-20 00:40:32,100 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 18 [2020-10-20 00:40:32,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:32,101 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-10-20 00:40:32,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-20 00:40:32,101 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-10-20 00:40:32,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-20 00:40:32,103 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:32,103 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:32,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-10-20 00:40:32,304 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:32,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:32,305 INFO L82 PathProgramCache]: Analyzing trace with hash -208358251, now seen corresponding path program 1 times [2020-10-20 00:40:32,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:40:32,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1394528860] [2020-10-20 00:40:32,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-10-20 00:40:32,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:40:32,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-20 00:40:32,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:40:32,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:32,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:40:32,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 00:40:32,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1394528860] [2020-10-20 00:40:32,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:40:32,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2020-10-20 00:40:32,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979503581] [2020-10-20 00:40:32,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 00:40:32,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:40:32,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 00:40:32,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-20 00:40:32,416 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 5 states. [2020-10-20 00:40:32,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:40:32,477 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2020-10-20 00:40:32,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 00:40:32,483 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-20 00:40:32,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:40:32,484 INFO L225 Difference]: With dead ends: 43 [2020-10-20 00:40:32,484 INFO L226 Difference]: Without dead ends: 23 [2020-10-20 00:40:32,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-20 00:40:32,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-20 00:40:32,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-20 00:40:32,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-20 00:40:32,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 22 transitions. [2020-10-20 00:40:32,500 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 22 transitions. Word has length 19 [2020-10-20 00:40:32,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:40:32,500 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 22 transitions. [2020-10-20 00:40:32,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 00:40:32,502 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 22 transitions. [2020-10-20 00:40:32,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-20 00:40:32,503 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:40:32,503 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:40:32,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-10-20 00:40:32,704 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:40:32,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:40:32,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1524231306, now seen corresponding path program 1 times [2020-10-20 00:40:32,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:40:32,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1903360951] [2020-10-20 00:40:32,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2020-10-20 00:40:32,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:40:32,810 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:40:32,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:40:32,933 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:40:32,984 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-10-20 00:40:32,985 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 00:40:33,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-10-20 00:40:33,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:40:33 BoogieIcfgContainer [2020-10-20 00:40:33,231 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:40:33,232 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:40:33,232 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:40:33,232 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:40:33,232 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:40:29" (3/4) ... [2020-10-20 00:40:33,234 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-20 00:40:33,301 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 00:40:33,301 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:40:33,303 INFO L168 Benchmark]: Toolchain (without parser) took 5089.31 ms. Allocated memory was 41.9 MB in the beginning and 51.9 MB in the end (delta: 10.0 MB). Free memory was 19.9 MB in the beginning and 34.0 MB in the end (delta: -14.1 MB). Peak memory consumption was 18.0 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:33,304 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 31.5 MB. Free memory was 7.7 MB in the beginning and 7.7 MB in the end (delta: 43.7 kB). Peak memory consumption was 43.7 kB. Max. memory is 14.3 GB. [2020-10-20 00:40:33,305 INFO L168 Benchmark]: CACSL2BoogieTranslator took 486.76 ms. Allocated memory was 41.9 MB in the beginning and 42.5 MB in the end (delta: 524.3 kB). Free memory was 19.1 MB in the beginning and 17.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 9.7 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:33,305 INFO L168 Benchmark]: Boogie Procedure Inliner took 82.80 ms. Allocated memory is still 42.5 MB. Free memory was 17.3 MB in the beginning and 15.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:33,312 INFO L168 Benchmark]: Boogie Preprocessor took 81.36 ms. Allocated memory is still 42.5 MB. Free memory was 15.2 MB in the beginning and 13.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:33,314 INFO L168 Benchmark]: RCFGBuilder took 545.40 ms. Allocated memory was 42.5 MB in the beginning and 44.6 MB in the end (delta: 2.1 MB). Free memory was 13.4 MB in the beginning and 25.6 MB in the end (delta: -12.2 MB). Peak memory consumption was 5.2 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:33,314 INFO L168 Benchmark]: TraceAbstraction took 3811.66 ms. Allocated memory was 44.6 MB in the beginning and 50.3 MB in the end (delta: 5.8 MB). Free memory was 25.1 MB in the beginning and 13.5 MB in the end (delta: 11.6 MB). Peak memory consumption was 17.4 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:33,315 INFO L168 Benchmark]: Witness Printer took 69.37 ms. Allocated memory was 50.3 MB in the beginning and 51.9 MB in the end (delta: 1.6 MB). Free memory was 13.5 MB in the beginning and 34.0 MB in the end (delta: -20.5 MB). Peak memory consumption was 3.1 MB. Max. memory is 14.3 GB. [2020-10-20 00:40:33,325 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 31.5 MB. Free memory was 7.7 MB in the beginning and 7.7 MB in the end (delta: 43.7 kB). Peak memory consumption was 43.7 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 486.76 ms. Allocated memory was 41.9 MB in the beginning and 42.5 MB in the end (delta: 524.3 kB). Free memory was 19.1 MB in the beginning and 17.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 9.7 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 82.80 ms. Allocated memory is still 42.5 MB. Free memory was 17.3 MB in the beginning and 15.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 81.36 ms. Allocated memory is still 42.5 MB. Free memory was 15.2 MB in the beginning and 13.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. * RCFGBuilder took 545.40 ms. Allocated memory was 42.5 MB in the beginning and 44.6 MB in the end (delta: 2.1 MB). Free memory was 13.4 MB in the beginning and 25.6 MB in the end (delta: -12.2 MB). Peak memory consumption was 5.2 MB. Max. memory is 14.3 GB. * TraceAbstraction took 3811.66 ms. Allocated memory was 44.6 MB in the beginning and 50.3 MB in the end (delta: 5.8 MB). Free memory was 25.1 MB in the beginning and 13.5 MB in the end (delta: 11.6 MB). Peak memory consumption was 17.4 MB. Max. memory is 14.3 GB. * Witness Printer took 69.37 ms. Allocated memory was 50.3 MB in the beginning and 51.9 MB in the end (delta: 1.6 MB). Free memory was 13.5 MB in the beginning and 34.0 MB in the end (delta: -20.5 MB). Peak memory consumption was 3.1 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L66] float x = -0.0f; [L67] float y = 0.0f; [L15] __uint32_t w; [L18] ieee_float_shape_type gf_u; [L19] gf_u.value = (x) [L20] EXPR gf_u.word [L20] (w) = gf_u.word [L23] COND TRUE w == 0x00000000 || w == 0x80000000 [L24] return 2; [L38] COND FALSE !(__fpclassify_float(x) == 0) [L15] __uint32_t w; [L18] ieee_float_shape_type gf_u; [L19] gf_u.value = (x) [L20] EXPR gf_u.word [L20] (w) = gf_u.word [L23] COND TRUE w == 0x00000000 || w == 0x80000000 [L24] return 2; [L40] COND FALSE !(__fpclassify_float(y) == 0) [L43] EXPR x < y ? x : y [L43] return x < y ? x : y; [L68] float res = fmin_float(x, y); [L71] EXPR res == -0.0f && __signbit_float(res) == 1 [L47] __uint32_t w; [L50] ieee_float_shape_type gf_u; [L51] gf_u.value = (x) [L52] EXPR gf_u.word [L52] (w) = gf_u.word [L55] return (w & 0x80000000) != 0; [L71] EXPR res == -0.0f && __signbit_float(res) == 1 [L71] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) [L3] __assert_fail("0", "float_req_bl_1232b.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.7s, OverallIterations: 8, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 222 SDtfs, 175 SDslu, 301 SDs, 0 SdLazy, 100 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 209 GetRequests, 169 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred 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, 7 MinimizatonAttempts, 59 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 128 NumberOfCodeBlocks, 128 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 198 ConstructedInterpolants, 0 QuantifiedInterpolants, 7783 SizeOfPredicates, 27 NumberOfNonLiveVariables, 433 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 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 proved your program to be incorrect! Received shutdown request...