./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-newlib/double_req_bl_1252b.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/double_req_bl_1252b.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 a6231fe9945ed231781bef28be0893007c672b08 .................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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/double_req_bl_1252b.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 a6231fe9945ed231781bef28be0893007c672b08 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 00:33:26,351 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:33:26,354 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:33:26,395 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:33:26,395 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:33:26,408 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:33:26,410 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:33:26,412 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:33:26,415 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:33:26,416 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:33:26,417 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:33:26,419 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:33:26,420 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:33:26,423 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:33:26,426 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:33:26,427 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:33:26,428 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:33:26,432 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:33:26,434 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:33:26,437 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:33:26,439 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:33:26,441 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:33:26,442 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:33:26,445 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:33:26,451 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:33:26,452 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:33:26,453 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:33:26,454 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:33:26,455 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:33:26,456 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:33:26,458 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:33:26,459 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:33:26,460 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:33:26,461 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:33:26,462 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:33:26,463 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:33:26,463 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:33:26,464 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:33:26,464 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:33:26,465 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:33:26,466 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:33:26,467 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-20 00:33:26,500 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:33:26,500 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:33:26,502 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:33:26,502 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:33:26,502 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:33:26,502 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:33:26,503 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:33:26,503 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 00:33:26,503 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:33:26,503 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:33:26,503 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:33:26,503 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:33:26,504 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:33:26,504 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:33:26,504 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:33:26,504 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:33:26,504 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:33:26,505 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:33:26,505 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:33:26,505 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:33:26,505 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:33:26,505 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:33:26,506 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:33:26,506 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:33:26,506 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:33:26,506 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 00:33:26,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 00:33:26,507 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:33:26,507 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:33:26,507 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 -> a6231fe9945ed231781bef28be0893007c672b08 [2020-10-20 00:33:26,731 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:33:26,752 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:33:26,757 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:33:26,760 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:33:26,763 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:33:26,764 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/double_req_bl_1252b.c [2020-10-20 00:33:26,843 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9f52ea79/17fc33b8bde948b6b6eb28f01083d834/FLAGbefd49fcd [2020-10-20 00:33:27,327 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:33:27,328 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/double_req_bl_1252b.c [2020-10-20 00:33:27,336 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9f52ea79/17fc33b8bde948b6b6eb28f01083d834/FLAGbefd49fcd [2020-10-20 00:33:27,734 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9f52ea79/17fc33b8bde948b6b6eb28f01083d834 [2020-10-20 00:33:27,737 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:33:27,743 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:33:27,744 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:33:27,744 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:33:27,748 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:33:27,749 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:33:27" (1/1) ... [2020-10-20 00:33:27,752 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d1fab63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:27, skipping insertion in model container [2020-10-20 00:33:27,752 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:33:27" (1/1) ... [2020-10-20 00:33:27,760 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:33:27,784 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:33:28,029 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:33:28,048 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:33:28,076 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:33:28,092 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:33:28,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:28 WrapperNode [2020-10-20 00:33:28,093 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:33:28,094 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:33:28,094 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:33:28,094 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:33:28,101 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:28" (1/1) ... [2020-10-20 00:33:28,111 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:28" (1/1) ... [2020-10-20 00:33:28,144 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:33:28,145 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:33:28,145 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:33:28,145 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:33:28,153 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:28" (1/1) ... [2020-10-20 00:33:28,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:28" (1/1) ... [2020-10-20 00:33:28,156 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:28" (1/1) ... [2020-10-20 00:33:28,157 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:28" (1/1) ... [2020-10-20 00:33:28,171 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:28" (1/1) ... [2020-10-20 00:33:28,182 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:28" (1/1) ... [2020-10-20 00:33:28,184 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:28" (1/1) ... [2020-10-20 00:33:28,187 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:33:28,187 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:33:28,187 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:33:28,188 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:33:28,189 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:28" (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 00:33:28,256 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 00:33:28,257 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:33:28,257 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-20 00:33:28,257 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:33:28,257 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:33:28,258 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-20 00:33:28,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 00:33:28,627 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:33:28,627 INFO L298 CfgBuilder]: Removed 20 assume(true) statements. [2020-10-20 00:33:28,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:33:28 BoogieIcfgContainer [2020-10-20 00:33:28,630 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:33:28,631 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:33:28,632 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:33:28,636 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:33:28,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:33:27" (1/3) ... [2020-10-20 00:33:28,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19cd43b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:33:28, skipping insertion in model container [2020-10-20 00:33:28,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:28" (2/3) ... [2020-10-20 00:33:28,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19cd43b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:33:28, skipping insertion in model container [2020-10-20 00:33:28,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:33:28" (3/3) ... [2020-10-20 00:33:28,640 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1252b.c [2020-10-20 00:33:28,653 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:33:28,661 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:33:28,683 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:33:28,722 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:33:28,722 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:33:28,736 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:33:28,736 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:33:28,739 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:33:28,739 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:33:28,739 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:33:28,740 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:33:28,755 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-20 00:33:28,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-20 00:33:28,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:33:28,762 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:33:28,762 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:33:28,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:33:28,767 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2020-10-20 00:33:28,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:33:28,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579722445] [2020-10-20 00:33:28,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:33:28,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:33:28,928 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 00:33:28,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579722445] [2020-10-20 00:33:28,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:33:28,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 00:33:28,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439321023] [2020-10-20 00:33:28,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 00:33:28,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:33:28,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 00:33:28,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:33:28,952 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-10-20 00:33:28,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:33:28,971 INFO L93 Difference]: Finished difference Result 63 states and 99 transitions. [2020-10-20 00:33:28,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 00:33:28,973 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-20 00:33:28,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:33:28,985 INFO L225 Difference]: With dead ends: 63 [2020-10-20 00:33:28,985 INFO L226 Difference]: Without dead ends: 29 [2020-10-20 00:33:28,989 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 00:33:29,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-20 00:33:29,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-20 00:33:29,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-20 00:33:29,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2020-10-20 00:33:29,029 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2020-10-20 00:33:29,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:33:29,030 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2020-10-20 00:33:29,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 00:33:29,030 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2020-10-20 00:33:29,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 00:33:29,031 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:33:29,032 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:33:29,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 00:33:29,032 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:33:29,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:33:29,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2020-10-20 00:33:29,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:33:29,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584592222] [2020-10-20 00:33:29,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:33:29,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:33:29,158 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 00:33:29,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584592222] [2020-10-20 00:33:29,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:33:29,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 00:33:29,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623712453] [2020-10-20 00:33:29,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:33:29,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:33:29,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:33:29,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:33:29,162 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 4 states. [2020-10-20 00:33:29,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:33:29,265 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2020-10-20 00:33:29,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:33:29,266 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-10-20 00:33:29,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:33:29,267 INFO L225 Difference]: With dead ends: 53 [2020-10-20 00:33:29,268 INFO L226 Difference]: Without dead ends: 44 [2020-10-20 00:33:29,269 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 00:33:29,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-20 00:33:29,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2020-10-20 00:33:29,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-20 00:33:29,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-10-20 00:33:29,277 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2020-10-20 00:33:29,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:33:29,278 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-10-20 00:33:29,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:33:29,278 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-10-20 00:33:29,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-20 00:33:29,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:33:29,279 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:33:29,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 00:33:29,280 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:33:29,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:33:29,281 INFO L82 PathProgramCache]: Analyzing trace with hash 502201410, now seen corresponding path program 1 times [2020-10-20 00:33:29,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:33:29,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593258937] [2020-10-20 00:33:29,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:33:29,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:33:29,372 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 00:33:29,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593258937] [2020-10-20 00:33:29,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:33:29,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 00:33:29,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58200040] [2020-10-20 00:33:29,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:33:29,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:33:29,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:33:29,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:33:29,375 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-10-20 00:33:29,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:33:29,431 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2020-10-20 00:33:29,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:33:29,432 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-20 00:33:29,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:33:29,434 INFO L225 Difference]: With dead ends: 55 [2020-10-20 00:33:29,434 INFO L226 Difference]: Without dead ends: 46 [2020-10-20 00:33:29,434 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 00:33:29,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-20 00:33:29,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2020-10-20 00:33:29,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-20 00:33:29,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-10-20 00:33:29,442 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 12 [2020-10-20 00:33:29,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:33:29,442 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-10-20 00:33:29,443 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:33:29,443 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-10-20 00:33:29,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-20 00:33:29,444 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:33:29,444 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:33:29,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-20 00:33:29,445 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:33:29,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:33:29,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1951233721, now seen corresponding path program 1 times [2020-10-20 00:33:29,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:33:29,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103001607] [2020-10-20 00:33:29,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:33:29,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:33:29,520 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 00:33:29,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103001607] [2020-10-20 00:33:29,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:33:29,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 00:33:29,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668616340] [2020-10-20 00:33:29,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:33:29,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:33:29,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:33:29,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:33:29,525 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-10-20 00:33:29,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:33:29,591 INFO L93 Difference]: Finished difference Result 57 states and 71 transitions. [2020-10-20 00:33:29,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:33:29,592 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-20 00:33:29,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:33:29,596 INFO L225 Difference]: With dead ends: 57 [2020-10-20 00:33:29,596 INFO L226 Difference]: Without dead ends: 48 [2020-10-20 00:33:29,597 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 00:33:29,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-20 00:33:29,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 31. [2020-10-20 00:33:29,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-20 00:33:29,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-10-20 00:33:29,608 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 13 [2020-10-20 00:33:29,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:33:29,608 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-10-20 00:33:29,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:33:29,609 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-10-20 00:33:29,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-20 00:33:29,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:33:29,611 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:33:29,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-20 00:33:29,612 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:33:29,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:33:29,613 INFO L82 PathProgramCache]: Analyzing trace with hash -555760345, now seen corresponding path program 1 times [2020-10-20 00:33:29,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:33:29,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768758699] [2020-10-20 00:33:29,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:33:29,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:33:29,711 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 00:33:29,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768758699] [2020-10-20 00:33:29,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:33:29,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 00:33:29,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773787218] [2020-10-20 00:33:29,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:33:29,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 00:33:29,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:33:29,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:33:29,715 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 4 states. [2020-10-20 00:33:29,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:33:29,773 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2020-10-20 00:33:29,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:33:29,774 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-20 00:33:29,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:33:29,775 INFO L225 Difference]: With dead ends: 55 [2020-10-20 00:33:29,775 INFO L226 Difference]: Without dead ends: 46 [2020-10-20 00:33:29,775 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 00:33:29,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-20 00:33:29,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 31. [2020-10-20 00:33:29,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-20 00:33:29,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-10-20 00:33:29,781 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 14 [2020-10-20 00:33:29,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:33:29,781 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-10-20 00:33:29,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:33:29,781 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-10-20 00:33:29,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-20 00:33:29,782 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:33:29,782 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:33:29,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-20 00:33:29,783 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:33:29,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:33:29,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2020-10-20 00:33:29,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 00:33:29,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177297386] [2020-10-20 00:33:29,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 00:33:29,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:33:29,812 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:33:29,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:33:29,834 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:33:29,872 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 00:33:29,873 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 00:33:29,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-20 00:33:29,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:33:29 BoogieIcfgContainer [2020-10-20 00:33:29,930 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:33:29,930 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:33:29,931 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:33:29,931 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:33:29,932 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:33:28" (3/4) ... [2020-10-20 00:33:29,937 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-20 00:33:29,938 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:33:29,942 INFO L168 Benchmark]: Toolchain (without parser) took 2201.42 ms. Allocated memory was 44.6 MB in the beginning and 50.3 MB in the end (delta: 5.8 MB). Free memory was 24.3 MB in the beginning and 12.8 MB in the end (delta: 11.5 MB). Peak memory consumption was 17.3 MB. Max. memory is 14.3 GB. [2020-10-20 00:33:29,943 INFO L168 Benchmark]: CDTParser took 0.98 ms. Allocated memory is still 33.0 MB. Free memory is still 11.6 MB. There was no memory consumed. Max. memory is 14.3 GB. [2020-10-20 00:33:29,945 INFO L168 Benchmark]: CACSL2BoogieTranslator took 349.74 ms. Allocated memory is still 44.6 MB. Free memory was 23.5 MB in the beginning and 24.4 MB in the end (delta: -949.3 kB). Peak memory consumption was 14.4 MB. Max. memory is 14.3 GB. [2020-10-20 00:33:29,947 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.31 ms. Allocated memory is still 44.6 MB. Free memory was 24.4 MB in the beginning and 22.2 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 14.3 GB. [2020-10-20 00:33:29,952 INFO L168 Benchmark]: Boogie Preprocessor took 42.33 ms. Allocated memory is still 44.6 MB. Free memory was 22.2 MB in the beginning and 20.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:33:29,953 INFO L168 Benchmark]: RCFGBuilder took 443.01 ms. Allocated memory was 44.6 MB in the beginning and 47.2 MB in the end (delta: 2.6 MB). Free memory was 20.4 MB in the beginning and 18.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 11.5 MB. Max. memory is 14.3 GB. [2020-10-20 00:33:29,955 INFO L168 Benchmark]: TraceAbstraction took 1298.52 ms. Allocated memory was 47.2 MB in the beginning and 50.3 MB in the end (delta: 3.1 MB). Free memory was 18.2 MB in the beginning and 13.2 MB in the end (delta: 5.0 MB). Peak memory consumption was 8.2 MB. Max. memory is 14.3 GB. [2020-10-20 00:33:29,959 INFO L168 Benchmark]: Witness Printer took 8.19 ms. Allocated memory is still 50.3 MB. Free memory was 13.2 MB in the beginning and 12.8 MB in the end (delta: 396.4 kB). Peak memory consumption was 396.4 kB. Max. memory is 14.3 GB. [2020-10-20 00:33:29,980 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.98 ms. Allocated memory is still 33.0 MB. Free memory is still 11.6 MB. There was no memory consumed. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 349.74 ms. Allocated memory is still 44.6 MB. Free memory was 23.5 MB in the beginning and 24.4 MB in the end (delta: -949.3 kB). Peak memory consumption was 14.4 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 50.31 ms. Allocated memory is still 44.6 MB. Free memory was 24.4 MB in the beginning and 22.2 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 42.33 ms. Allocated memory is still 44.6 MB. Free memory was 22.2 MB in the beginning and 20.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. * RCFGBuilder took 443.01 ms. Allocated memory was 44.6 MB in the beginning and 47.2 MB in the end (delta: 2.6 MB). Free memory was 20.4 MB in the beginning and 18.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 11.5 MB. Max. memory is 14.3 GB. * TraceAbstraction took 1298.52 ms. Allocated memory was 47.2 MB in the beginning and 50.3 MB in the end (delta: 3.1 MB). Free memory was 18.2 MB in the beginning and 13.2 MB in the end (delta: 5.0 MB). Peak memory consumption was 8.2 MB. Max. memory is 14.3 GB. * Witness Printer took 8.19 ms. Allocated memory is still 50.3 MB. Free memory was 13.2 MB in the beginning and 12.8 MB in the end (delta: 396.4 kB). Peak memory consumption was 396.4 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 someBinaryDOUBLEComparisonOperation at line 86, overapproximation of someUnaryDOUBLEoperation at line 82. Possible FailurePath: [L81] double x = 0.0; [L82] double y = -0.0; [L26] __uint32_t msw, lsw; [L29] ieee_double_shape_type ew_u; [L30] ew_u.value = (x) [L31] EXPR ew_u.parts.msw [L31] (msw) = ew_u.parts.msw [L32] EXPR ew_u.parts.lsw [L32] (lsw) = ew_u.parts.lsw [L35-L36] COND FALSE !((msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000)) [L38-L39] COND FALSE !((msw >= 0x00100000 && msw <= 0x7fefffff) || (msw >= 0x80100000 && msw <= 0xffefffff)) [L41-L42] COND FALSE !(( msw <= 0x000fffff) || (msw >= 0x80000000 && msw <= 0x800fffff)) [L45-L46] COND FALSE !((msw == 0x7ff00000 && lsw == 0x00000000) || (msw == 0xfff00000 && lsw == 0x00000000)) [L49] return 0; [L54] COND TRUE __fpclassify_double(x) == 0 [L55] return y; [L83] double res = fmax_double(x, y); [L86] EXPR res == 0.0 && __signbit_double(res) == 0 [L86] COND TRUE !(res == 0.0 && __signbit_double(res) == 0) [L3] __assert_fail("0", "double_req_bl_1252b.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: 0.3s, 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, 0.3s 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 00:33:32,215 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 00:33:32,218 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 00:33:32,243 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 00:33:32,244 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 00:33:32,245 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 00:33:32,246 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 00:33:32,248 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 00:33:32,258 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 00:33:32,259 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 00:33:32,260 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 00:33:32,261 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 00:33:32,261 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 00:33:32,262 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 00:33:32,264 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 00:33:32,265 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 00:33:32,265 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 00:33:32,266 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 00:33:32,268 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 00:33:32,271 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 00:33:32,272 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 00:33:32,273 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 00:33:32,275 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 00:33:32,276 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 00:33:32,278 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 00:33:32,279 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 00:33:32,279 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 00:33:32,280 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 00:33:32,281 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 00:33:32,282 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 00:33:32,282 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 00:33:32,283 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 00:33:32,284 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 00:33:32,284 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 00:33:32,286 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 00:33:32,286 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 00:33:32,287 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 00:33:32,287 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 00:33:32,287 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 00:33:32,288 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 00:33:32,289 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 00:33:32,290 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-10-20 00:33:32,313 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 00:33:32,314 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 00:33:32,315 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 00:33:32,315 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 00:33:32,315 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 00:33:32,315 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 00:33:32,316 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 00:33:32,316 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 00:33:32,316 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 00:33:32,316 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 00:33:32,316 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 00:33:32,317 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 00:33:32,317 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-20 00:33:32,317 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-20 00:33:32,317 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 00:33:32,317 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 00:33:32,317 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 00:33:32,318 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 00:33:32,318 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 00:33:32,318 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 00:33:32,318 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 00:33:32,318 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 00:33:32,319 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 00:33:32,319 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 00:33:32,319 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 00:33:32,319 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 00:33:32,319 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-20 00:33:32,320 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-20 00:33:32,320 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 00:33:32,320 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 00:33:32,320 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-20 00:33:32,320 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 -> a6231fe9945ed231781bef28be0893007c672b08 [2020-10-20 00:33:32,512 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 00:33:32,535 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 00:33:32,541 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 00:33:32,543 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 00:33:32,544 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 00:33:32,545 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/double_req_bl_1252b.c [2020-10-20 00:33:32,621 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abf287deb/3361c2426bc74cefb96067839a0d1038/FLAG491a1a409 [2020-10-20 00:33:33,104 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 00:33:33,105 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/double_req_bl_1252b.c [2020-10-20 00:33:33,111 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abf287deb/3361c2426bc74cefb96067839a0d1038/FLAG491a1a409 [2020-10-20 00:33:33,513 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abf287deb/3361c2426bc74cefb96067839a0d1038 [2020-10-20 00:33:33,517 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 00:33:33,522 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 00:33:33,523 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 00:33:33,524 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 00:33:33,527 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 00:33:33,528 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:33:33" (1/1) ... [2020-10-20 00:33:33,531 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@617698ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:33, skipping insertion in model container [2020-10-20 00:33:33,532 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 12:33:33" (1/1) ... [2020-10-20 00:33:33,540 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 00:33:33,564 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 00:33:33,846 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:33:33,862 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 00:33:33,897 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 00:33:33,921 INFO L208 MainTranslator]: Completed translation [2020-10-20 00:33:33,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:33 WrapperNode [2020-10-20 00:33:33,922 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 00:33:33,923 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 00:33:33,924 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 00:33:33,924 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 00:33:33,933 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:33" (1/1) ... [2020-10-20 00:33:33,946 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:33" (1/1) ... [2020-10-20 00:33:33,978 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 00:33:33,979 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 00:33:33,979 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 00:33:33,979 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 00:33:33,988 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:33" (1/1) ... [2020-10-20 00:33:33,989 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:33" (1/1) ... [2020-10-20 00:33:33,993 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:33" (1/1) ... [2020-10-20 00:33:33,994 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:33" (1/1) ... [2020-10-20 00:33:34,005 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:33" (1/1) ... [2020-10-20 00:33:34,010 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:33" (1/1) ... [2020-10-20 00:33:34,013 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:33" (1/1) ... [2020-10-20 00:33:34,017 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 00:33:34,018 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 00:33:34,018 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 00:33:34,019 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 00:33:34,020 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:33" (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 00:33:34,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2020-10-20 00:33:34,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-20 00:33:34,098 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 00:33:34,098 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-10-20 00:33:34,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 00:33:34,098 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 00:33:34,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 00:33:34,581 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 00:33:34,581 INFO L298 CfgBuilder]: Removed 20 assume(true) statements. [2020-10-20 00:33:34,583 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:33:34 BoogieIcfgContainer [2020-10-20 00:33:34,583 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 00:33:34,585 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 00:33:34,585 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 00:33:34,588 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 00:33:34,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 12:33:33" (1/3) ... [2020-10-20 00:33:34,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d37c2af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:33:34, skipping insertion in model container [2020-10-20 00:33:34,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 12:33:33" (2/3) ... [2020-10-20 00:33:34,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d37c2af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 12:33:34, skipping insertion in model container [2020-10-20 00:33:34,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:33:34" (3/3) ... [2020-10-20 00:33:34,593 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1252b.c [2020-10-20 00:33:34,605 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 00:33:34,612 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-20 00:33:34,626 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-20 00:33:34,662 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 00:33:34,662 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 00:33:34,662 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 00:33:34,663 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 00:33:34,663 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 00:33:34,663 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 00:33:34,663 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 00:33:34,664 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 00:33:34,678 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-20 00:33:34,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-20 00:33:34,684 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:33:34,685 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:33:34,686 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:33:34,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:33:34,691 INFO L82 PathProgramCache]: Analyzing trace with hash -958075201, now seen corresponding path program 1 times [2020-10-20 00:33:34,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:33:34,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1750807761] [2020-10-20 00:33:34,706 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 00:33:34,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:33:34,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-20 00:33:34,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:33:34,834 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 00:33:34,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:33:34,839 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 00:33:34,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1750807761] [2020-10-20 00:33:34,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:33:34,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-20 00:33:34,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589701368] [2020-10-20 00:33:34,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 00:33:34,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:33:34,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 00:33:34,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 00:33:34,861 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-10-20 00:33:34,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:33:34,882 INFO L93 Difference]: Finished difference Result 63 states and 99 transitions. [2020-10-20 00:33:34,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 00:33:34,884 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-20 00:33:34,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:33:34,897 INFO L225 Difference]: With dead ends: 63 [2020-10-20 00:33:34,897 INFO L226 Difference]: Without dead ends: 29 [2020-10-20 00:33:34,901 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 00:33:34,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-20 00:33:34,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-20 00:33:34,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-20 00:33:34,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2020-10-20 00:33:34,944 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 10 [2020-10-20 00:33:34,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:33:34,944 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2020-10-20 00:33:34,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 00:33:34,944 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2020-10-20 00:33:34,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 00:33:34,945 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:33:34,945 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:33:35,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-20 00:33:35,168 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:33:35,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:33:35,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1001584898, now seen corresponding path program 1 times [2020-10-20 00:33:35,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:33:35,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1538844348] [2020-10-20 00:33:35,171 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 00:33:35,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:33:35,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-20 00:33:35,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:33:35,355 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 00:33:35,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:33:35,375 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 00:33:35,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1538844348] [2020-10-20 00:33:35,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:33:35,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-10-20 00:33:35,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060845798] [2020-10-20 00:33:35,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 00:33:35,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:33:35,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 00:33:35,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-20 00:33:35,379 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 6 states. [2020-10-20 00:33:35,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:33:35,492 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2020-10-20 00:33:35,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 00:33:35,493 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-10-20 00:33:35,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:33:35,495 INFO L225 Difference]: With dead ends: 68 [2020-10-20 00:33:35,495 INFO L226 Difference]: Without dead ends: 59 [2020-10-20 00:33:35,496 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 00:33:35,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-20 00:33:35,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 31. [2020-10-20 00:33:35,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-20 00:33:35,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2020-10-20 00:33:35,504 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 11 [2020-10-20 00:33:35,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:33:35,504 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2020-10-20 00:33:35,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 00:33:35,505 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2020-10-20 00:33:35,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-20 00:33:35,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:33:35,518 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:33:35,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-20 00:33:35,733 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:33:35,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:33:35,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1219247017, now seen corresponding path program 1 times [2020-10-20 00:33:35,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:33:35,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [307034856] [2020-10-20 00:33:35,735 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 00:33:35,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:33:35,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-20 00:33:35,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:33:35,884 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 00:33:35,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:33:35,931 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 00:33:35,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [307034856] [2020-10-20 00:33:35,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:33:35,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-10-20 00:33:35,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287283757] [2020-10-20 00:33:35,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 00:33:35,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:33:35,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 00:33:35,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-20 00:33:35,934 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand 6 states. [2020-10-20 00:33:36,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:33:36,122 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2020-10-20 00:33:36,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 00:33:36,122 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-10-20 00:33:36,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:33:36,123 INFO L225 Difference]: With dead ends: 52 [2020-10-20 00:33:36,123 INFO L226 Difference]: Without dead ends: 28 [2020-10-20 00:33:36,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-20 00:33:36,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-20 00:33:36,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-20 00:33:36,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-20 00:33:36,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2020-10-20 00:33:36,130 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 14 [2020-10-20 00:33:36,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:33:36,131 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2020-10-20 00:33:36,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 00:33:36,131 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2020-10-20 00:33:36,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-20 00:33:36,132 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:33:36,133 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 00:33:36,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-20 00:33:36,349 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:33:36,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:33:36,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1012446717, now seen corresponding path program 1 times [2020-10-20 00:33:36,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:33:36,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1279853569] [2020-10-20 00:33:36,350 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 00:33:36,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:33:36,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-20 00:33:36,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:33:36,485 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 00:33:36,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:33:36,502 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 00:33:36,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1279853569] [2020-10-20 00:33:36,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:33:36,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-10-20 00:33:36,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979289295] [2020-10-20 00:33:36,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 00:33:36,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:33:36,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 00:33:36,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-20 00:33:36,505 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 6 states. [2020-10-20 00:33:36,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:33:36,616 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2020-10-20 00:33:36,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 00:33:36,617 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-20 00:33:36,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:33:36,618 INFO L225 Difference]: With dead ends: 65 [2020-10-20 00:33:36,618 INFO L226 Difference]: Without dead ends: 56 [2020-10-20 00:33:36,618 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 00:33:36,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-20 00:33:36,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 30. [2020-10-20 00:33:36,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-20 00:33:36,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-10-20 00:33:36,624 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 16 [2020-10-20 00:33:36,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:33:36,625 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-10-20 00:33:36,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 00:33:36,625 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-10-20 00:33:36,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-20 00:33:36,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:33:36,626 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 00:33:36,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-10-20 00:33:36,841 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:33:36,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:33:36,841 INFO L82 PathProgramCache]: Analyzing trace with hash -414082333, now seen corresponding path program 1 times [2020-10-20 00:33:36,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:33:36,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2000404032] [2020-10-20 00:33:36,843 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 00:33:36,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:33:36,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 00:33:36,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:33:37,002 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 00:33:37,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:33:37,042 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 00:33:37,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2000404032] [2020-10-20 00:33:37,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:33:37,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2020-10-20 00:33:37,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894219135] [2020-10-20 00:33:37,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 00:33:37,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:33:37,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 00:33:37,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-20 00:33:37,046 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 4 states. [2020-10-20 00:33:37,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:33:37,086 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2020-10-20 00:33:37,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 00:33:37,087 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-20 00:33:37,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:33:37,088 INFO L225 Difference]: With dead ends: 40 [2020-10-20 00:33:37,088 INFO L226 Difference]: Without dead ends: 30 [2020-10-20 00:33:37,089 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 00:33:37,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-20 00:33:37,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-20 00:33:37,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-20 00:33:37,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2020-10-20 00:33:37,105 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 18 [2020-10-20 00:33:37,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:33:37,106 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2020-10-20 00:33:37,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 00:33:37,106 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2020-10-20 00:33:37,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-20 00:33:37,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:33:37,108 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 00:33:37,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-10-20 00:33:37,324 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:33:37,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:33:37,325 INFO L82 PathProgramCache]: Analyzing trace with hash -356824031, now seen corresponding path program 1 times [2020-10-20 00:33:37,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:33:37,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2028280673] [2020-10-20 00:33:37,326 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 00:33:37,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:33:37,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-20 00:33:37,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:33:37,490 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 00:33:37,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:33:37,557 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 00:33:37,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2028280673] [2020-10-20 00:33:37,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:33:37,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2020-10-20 00:33:37,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682557244] [2020-10-20 00:33:37,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-20 00:33:37,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:33:37,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-20 00:33:37,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-20 00:33:37,562 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 9 states. [2020-10-20 00:33:37,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:33:37,711 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2020-10-20 00:33:37,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 00:33:37,711 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-10-20 00:33:37,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:33:37,714 INFO L225 Difference]: With dead ends: 42 [2020-10-20 00:33:37,714 INFO L226 Difference]: Without dead ends: 39 [2020-10-20 00:33:37,715 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 00:33:37,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-20 00:33:37,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2020-10-20 00:33:37,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-20 00:33:37,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2020-10-20 00:33:37,721 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 18 [2020-10-20 00:33:37,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:33:37,721 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2020-10-20 00:33:37,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-20 00:33:37,721 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2020-10-20 00:33:37,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-20 00:33:37,722 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:33:37,722 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 00:33:37,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-10-20 00:33:37,925 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:33:37,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:33:37,926 INFO L82 PathProgramCache]: Analyzing trace with hash -208358251, now seen corresponding path program 1 times [2020-10-20 00:33:37,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:33:37,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1544163976] [2020-10-20 00:33:37,927 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 00:33:38,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 00:33:38,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-20 00:33:38,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 00:33:38,072 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 00:33:38,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 00:33:38,093 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-20 00:33:38,235 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 00:33:38,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1544163976] [2020-10-20 00:33:38,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 00:33:38,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2020-10-20 00:33:38,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393636545] [2020-10-20 00:33:38,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-20 00:33:38,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 00:33:38,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-20 00:33:38,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-20 00:33:38,238 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 8 states. [2020-10-20 00:33:38,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 00:33:38,395 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-10-20 00:33:38,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 00:33:38,396 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-10-20 00:33:38,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 00:33:38,397 INFO L225 Difference]: With dead ends: 45 [2020-10-20 00:33:38,397 INFO L226 Difference]: Without dead ends: 27 [2020-10-20 00:33:38,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-20 00:33:38,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-20 00:33:38,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-20 00:33:38,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-20 00:33:38,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-10-20 00:33:38,403 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 19 [2020-10-20 00:33:38,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 00:33:38,404 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-10-20 00:33:38,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-20 00:33:38,404 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-10-20 00:33:38,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-20 00:33:38,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 00:33:38,405 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 00:33:38,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-10-20 00:33:38,615 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-20 00:33:38,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 00:33:38,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1524231306, now seen corresponding path program 1 times [2020-10-20 00:33:38,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 00:33:38,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [455707139] [2020-10-20 00:33:38,617 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 00:33:38,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:33:38,911 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:33:39,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 00:33:39,132 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 00:33:39,221 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-10-20 00:33:39,221 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 00:33:39,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-10-20 00:33:39,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 12:33:39 BoogieIcfgContainer [2020-10-20 00:33:39,480 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 00:33:39,480 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 00:33:39,480 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 00:33:39,481 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 00:33:39,481 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 12:33:34" (3/4) ... [2020-10-20 00:33:39,483 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-20 00:33:39,542 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 00:33:39,542 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 00:33:39,545 INFO L168 Benchmark]: Toolchain (without parser) took 6025.72 ms. Allocated memory was 35.1 MB in the beginning and 55.1 MB in the end (delta: 19.9 MB). Free memory was 12.7 MB in the beginning and 17.0 MB in the end (delta: -4.3 MB). Peak memory consumption was 15.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:33:39,546 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 33.6 MB. Free memory was 19.0 MB in the beginning and 19.0 MB in the end (delta: 31.3 kB). Peak memory consumption was 31.3 kB. Max. memory is 14.3 GB. [2020-10-20 00:33:39,546 INFO L168 Benchmark]: CACSL2BoogieTranslator took 399.53 ms. Allocated memory was 35.1 MB in the beginning and 44.6 MB in the end (delta: 9.4 MB). Free memory was 11.8 MB in the beginning and 23.3 MB in the end (delta: -11.5 MB). Peak memory consumption was 10.8 MB. Max. memory is 14.3 GB. [2020-10-20 00:33:39,547 INFO L168 Benchmark]: Boogie Procedure Inliner took 55.17 ms. Allocated memory is still 44.6 MB. Free memory was 23.3 MB in the beginning and 21.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 14.3 GB. [2020-10-20 00:33:39,548 INFO L168 Benchmark]: Boogie Preprocessor took 39.12 ms. Allocated memory is still 44.6 MB. Free memory was 21.2 MB in the beginning and 19.3 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 14.3 GB. [2020-10-20 00:33:39,549 INFO L168 Benchmark]: RCFGBuilder took 565.40 ms. Allocated memory was 44.6 MB in the beginning and 46.1 MB in the end (delta: 1.6 MB). Free memory was 19.1 MB in the beginning and 22.9 MB in the end (delta: -3.7 MB). Peak memory consumption was 9.1 MB. Max. memory is 14.3 GB. [2020-10-20 00:33:39,549 INFO L168 Benchmark]: TraceAbstraction took 4895.18 ms. Allocated memory was 46.1 MB in the beginning and 55.1 MB in the end (delta: 8.9 MB). Free memory was 22.4 MB in the beginning and 20.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 10.6 MB. Max. memory is 14.3 GB. [2020-10-20 00:33:39,550 INFO L168 Benchmark]: Witness Printer took 62.33 ms. Allocated memory is still 55.1 MB. Free memory was 20.1 MB in the beginning and 17.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 14.3 GB. [2020-10-20 00:33:39,554 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 33.6 MB. Free memory was 19.0 MB in the beginning and 19.0 MB in the end (delta: 31.3 kB). Peak memory consumption was 31.3 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 399.53 ms. Allocated memory was 35.1 MB in the beginning and 44.6 MB in the end (delta: 9.4 MB). Free memory was 11.8 MB in the beginning and 23.3 MB in the end (delta: -11.5 MB). Peak memory consumption was 10.8 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 55.17 ms. Allocated memory is still 44.6 MB. Free memory was 23.3 MB in the beginning and 21.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 39.12 ms. Allocated memory is still 44.6 MB. Free memory was 21.2 MB in the beginning and 19.3 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 14.3 GB. * RCFGBuilder took 565.40 ms. Allocated memory was 44.6 MB in the beginning and 46.1 MB in the end (delta: 1.6 MB). Free memory was 19.1 MB in the beginning and 22.9 MB in the end (delta: -3.7 MB). Peak memory consumption was 9.1 MB. Max. memory is 14.3 GB. * TraceAbstraction took 4895.18 ms. Allocated memory was 46.1 MB in the beginning and 55.1 MB in the end (delta: 8.9 MB). Free memory was 22.4 MB in the beginning and 20.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 10.6 MB. Max. memory is 14.3 GB. * Witness Printer took 62.33 ms. Allocated memory is still 55.1 MB. Free memory was 20.1 MB in the beginning and 17.0 MB in the end (delta: 3.1 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: [L81] double x = 0.0; [L82] double y = -0.0; [L26] __uint32_t msw, lsw; [L29] ieee_double_shape_type ew_u; [L30] ew_u.value = (x) [L31] EXPR ew_u.parts.msw [L31] (msw) = ew_u.parts.msw [L32] EXPR ew_u.parts.lsw [L32] (lsw) = ew_u.parts.lsw [L35-L36] COND TRUE (msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000) [L37] return 2; [L54] COND FALSE !(__fpclassify_double(x) == 0) [L26] __uint32_t msw, lsw; [L29] ieee_double_shape_type ew_u; [L30] ew_u.value = (x) [L31] EXPR ew_u.parts.msw [L31] (msw) = ew_u.parts.msw [L32] EXPR ew_u.parts.lsw [L32] (lsw) = ew_u.parts.lsw [L35-L36] COND TRUE (msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000) [L37] return 2; [L56] COND FALSE !(__fpclassify_double(y) == 0) [L59] EXPR x > y ? x : y [L59] return x > y ? x : y; [L83] double res = fmax_double(x, y); [L86] EXPR res == 0.0 && __signbit_double(res) == 0 [L63] __uint32_t msw; [L66] ieee_double_shape_type gh_u; [L67] gh_u.value = (x) [L68] EXPR gh_u.parts.msw [L68] (msw) = gh_u.parts.msw [L71] return (msw & 0x80000000) != 0; [L86] EXPR res == 0.0 && __signbit_double(res) == 0 [L86] COND TRUE !(res == 0.0 && __signbit_double(res) == 0) [L3] __assert_fail("0", "double_req_bl_1252b.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: 4.7s, OverallIterations: 8, TraceHistogramMax: 1, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 234 SDtfs, 257 SDslu, 359 SDs, 0 SdLazy, 130 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 209 GetRequests, 168 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s 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, 61 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 128 NumberOfCodeBlocks, 128 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 198 ConstructedInterpolants, 15 QuantifiedInterpolants, 12524 SizeOfPredicates, 27 NumberOfNonLiveVariables, 463 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...