./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-newlib/double_req_bl_1250.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc 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_1.5.800.v20200727-1323.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_1250.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 216b013ad4da4eb5e85a87de58b407e30252b4c5 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_1.5.800.v20200727-1323.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_1250.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 216b013ad4da4eb5e85a87de58b407e30252b4c5 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-10-24 23:17:13,756 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 23:17:13,759 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 23:17:13,795 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-24 23:17:13,795 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-24 23:17:13,797 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-24 23:17:13,799 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-24 23:17:13,801 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-24 23:17:13,803 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-24 23:17:13,804 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-24 23:17:13,805 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-24 23:17:13,807 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-24 23:17:13,807 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 23:17:13,809 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 23:17:13,810 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 23:17:13,811 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 23:17:13,812 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 23:17:13,813 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 23:17:13,815 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 23:17:13,818 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 23:17:13,820 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 23:17:13,821 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 23:17:13,823 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 23:17:13,823 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 23:17:13,827 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-24 23:17:13,827 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-24 23:17:13,828 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-24 23:17:13,829 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-24 23:17:13,830 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-24 23:17:13,831 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-24 23:17:13,834 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-24 23:17:13,835 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-24 23:17:13,836 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-24 23:17:13,840 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-24 23:17:13,843 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-24 23:17:13,844 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-24 23:17:13,845 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-24 23:17:13,846 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-24 23:17:13,846 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 23:17:13,849 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 23:17:13,850 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 23:17:13,851 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-24 23:17:13,904 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 23:17:13,905 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 23:17:13,907 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-24 23:17:13,908 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-24 23:17:13,908 INFO L138 SettingsManager]: * Use SBE=true [2020-10-24 23:17:13,909 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 23:17:13,919 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 23:17:13,920 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 23:17:13,920 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 23:17:13,920 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 23:17:13,921 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 23:17:13,921 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 23:17:13,921 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 23:17:13,921 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 23:17:13,922 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 23:17:13,922 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 23:17:13,922 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 23:17:13,923 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 23:17:13,923 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-24 23:17:13,923 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 23:17:13,924 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 23:17:13,924 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 23:17:13,924 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 23:17:13,925 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-24 23:17:13,925 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-24 23:17:13,925 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-24 23:17:13,926 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-24 23:17:13,926 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 23:17:13,926 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-24 23:17:13,927 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 216b013ad4da4eb5e85a87de58b407e30252b4c5 [2020-10-24 23:17:14,317 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 23:17:14,342 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 23:17:14,346 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 23:17:14,347 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 23:17:14,348 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 23:17:14,349 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/double_req_bl_1250.c [2020-10-24 23:17:14,436 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb06f403f/e1df699e8ca24ddb9453b11475221ef3/FLAGfa69d808d [2020-10-24 23:17:15,000 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 23:17:15,001 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/double_req_bl_1250.c [2020-10-24 23:17:15,009 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb06f403f/e1df699e8ca24ddb9453b11475221ef3/FLAGfa69d808d [2020-10-24 23:17:15,378 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb06f403f/e1df699e8ca24ddb9453b11475221ef3 [2020-10-24 23:17:15,382 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 23:17:15,389 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-24 23:17:15,391 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 23:17:15,391 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 23:17:15,395 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 23:17:15,396 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:17:15" (1/1) ... [2020-10-24 23:17:15,399 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cd19d35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:15, skipping insertion in model container [2020-10-24 23:17:15,400 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:17:15" (1/1) ... [2020-10-24 23:17:15,408 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 23:17:15,425 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 23:17:15,691 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 23:17:15,708 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 23:17:15,763 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 23:17:15,786 INFO L208 MainTranslator]: Completed translation [2020-10-24 23:17:15,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:15 WrapperNode [2020-10-24 23:17:15,787 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 23:17:15,788 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-24 23:17:15,789 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-24 23:17:15,789 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-24 23:17:15,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:15" (1/1) ... [2020-10-24 23:17:15,822 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:15" (1/1) ... [2020-10-24 23:17:15,864 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-24 23:17:15,866 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 23:17:15,867 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 23:17:15,867 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 23:17:15,877 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:15" (1/1) ... [2020-10-24 23:17:15,877 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:15" (1/1) ... [2020-10-24 23:17:15,885 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:15" (1/1) ... [2020-10-24 23:17:15,886 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:15" (1/1) ... [2020-10-24 23:17:15,905 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:15" (1/1) ... [2020-10-24 23:17:15,910 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:15" (1/1) ... [2020-10-24 23:17:15,912 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:15" (1/1) ... [2020-10-24 23:17:15,915 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 23:17:15,916 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 23:17:15,916 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 23:17:15,917 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 23:17:15,917 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:15" (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 [2020-10-24 23:17:15,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 23:17:15,998 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 23:17:15,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-24 23:17:15,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 23:17:15,999 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 23:17:15,999 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 23:17:15,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 23:17:16,410 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 23:17:16,410 INFO L298 CfgBuilder]: Removed 18 assume(true) statements. [2020-10-24 23:17:16,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:17:16 BoogieIcfgContainer [2020-10-24 23:17:16,412 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 23:17:16,415 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 23:17:16,415 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 23:17:16,418 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 23:17:16,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 11:17:15" (1/3) ... [2020-10-24 23:17:16,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b2c77a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:17:16, skipping insertion in model container [2020-10-24 23:17:16,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:15" (2/3) ... [2020-10-24 23:17:16,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b2c77a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:17:16, skipping insertion in model container [2020-10-24 23:17:16,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:17:16" (3/3) ... [2020-10-24 23:17:16,422 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1250.c [2020-10-24 23:17:16,444 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-24 23:17:16,450 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 23:17:16,465 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 23:17:16,496 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 23:17:16,497 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 23:17:16,497 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-24 23:17:16,497 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 23:17:16,497 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 23:17:16,498 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 23:17:16,498 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 23:17:16,498 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 23:17:16,516 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-24 23:17:16,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-24 23:17:16,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:17:16,524 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:17:16,524 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:17:16,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:17:16,532 INFO L82 PathProgramCache]: Analyzing trace with hash -958093107, now seen corresponding path program 1 times [2020-10-24 23:17:16,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 23:17:16,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010022300] [2020-10-24 23:17:16,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 23:17:16,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:17:16,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:17:16,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010022300] [2020-10-24 23:17:16,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:17:16,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-24 23:17:16,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978990898] [2020-10-24 23:17:16,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-24 23:17:16,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 23:17:16,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-24 23:17:16,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-24 23:17:16,749 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2020-10-24 23:17:16,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:17:16,770 INFO L93 Difference]: Finished difference Result 55 states and 85 transitions. [2020-10-24 23:17:16,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-24 23:17:16,772 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-24 23:17:16,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:17:16,784 INFO L225 Difference]: With dead ends: 55 [2020-10-24 23:17:16,784 INFO L226 Difference]: Without dead ends: 25 [2020-10-24 23:17:16,788 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 [2020-10-24 23:17:16,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-24 23:17:16,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-24 23:17:16,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-24 23:17:16,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 35 transitions. [2020-10-24 23:17:16,830 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 35 transitions. Word has length 10 [2020-10-24 23:17:16,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:17:16,831 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 35 transitions. [2020-10-24 23:17:16,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-24 23:17:16,831 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 35 transitions. [2020-10-24 23:17:16,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-24 23:17:16,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:17:16,832 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:17:16,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 23:17:16,833 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:17:16,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:17:16,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1001566992, now seen corresponding path program 1 times [2020-10-24 23:17:16,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 23:17:16,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535282927] [2020-10-24 23:17:16,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 23:17:16,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:17:16,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:17:16,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535282927] [2020-10-24 23:17:16,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:17:16,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 23:17:16,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172818361] [2020-10-24 23:17:16,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 23:17:16,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 23:17:16,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 23:17:16,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 23:17:16,967 INFO L87 Difference]: Start difference. First operand 25 states and 35 transitions. Second operand 4 states. [2020-10-24 23:17:17,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:17:17,066 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-10-24 23:17:17,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 23:17:17,067 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-10-24 23:17:17,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:17:17,068 INFO L225 Difference]: With dead ends: 41 [2020-10-24 23:17:17,069 INFO L226 Difference]: Without dead ends: 36 [2020-10-24 23:17:17,070 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 [2020-10-24 23:17:17,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-24 23:17:17,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2020-10-24 23:17:17,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-24 23:17:17,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2020-10-24 23:17:17,077 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 11 [2020-10-24 23:17:17,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:17:17,078 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2020-10-24 23:17:17,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 23:17:17,078 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2020-10-24 23:17:17,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-24 23:17:17,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:17:17,080 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:17:17,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 23:17:17,080 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:17:17,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:17:17,082 INFO L82 PathProgramCache]: Analyzing trace with hash 502183504, now seen corresponding path program 1 times [2020-10-24 23:17:17,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 23:17:17,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526453230] [2020-10-24 23:17:17,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 23:17:17,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:17:17,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:17:17,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526453230] [2020-10-24 23:17:17,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:17:17,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 23:17:17,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380900366] [2020-10-24 23:17:17,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 23:17:17,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 23:17:17,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 23:17:17,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 23:17:17,152 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 4 states. [2020-10-24 23:17:17,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:17:17,248 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2020-10-24 23:17:17,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 23:17:17,250 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-24 23:17:17,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:17:17,251 INFO L225 Difference]: With dead ends: 43 [2020-10-24 23:17:17,252 INFO L226 Difference]: Without dead ends: 38 [2020-10-24 23:17:17,252 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 [2020-10-24 23:17:17,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-24 23:17:17,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 27. [2020-10-24 23:17:17,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-24 23:17:17,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2020-10-24 23:17:17,259 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 12 [2020-10-24 23:17:17,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:17:17,260 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2020-10-24 23:17:17,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 23:17:17,260 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2020-10-24 23:17:17,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-24 23:17:17,261 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:17:17,261 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:17:17,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-24 23:17:17,262 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:17:17,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:17:17,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1951251627, now seen corresponding path program 1 times [2020-10-24 23:17:17,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 23:17:17,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750959609] [2020-10-24 23:17:17,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 23:17:17,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:17:17,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:17:17,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750959609] [2020-10-24 23:17:17,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:17:17,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 23:17:17,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712300032] [2020-10-24 23:17:17,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 23:17:17,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 23:17:17,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 23:17:17,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 23:17:17,346 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 4 states. [2020-10-24 23:17:17,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:17:17,444 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2020-10-24 23:17:17,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 23:17:17,446 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-24 23:17:17,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:17:17,447 INFO L225 Difference]: With dead ends: 45 [2020-10-24 23:17:17,447 INFO L226 Difference]: Without dead ends: 40 [2020-10-24 23:17:17,448 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 [2020-10-24 23:17:17,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-24 23:17:17,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 27. [2020-10-24 23:17:17,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-24 23:17:17,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2020-10-24 23:17:17,454 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 13 [2020-10-24 23:17:17,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:17:17,455 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2020-10-24 23:17:17,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 23:17:17,455 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2020-10-24 23:17:17,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-24 23:17:17,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:17:17,456 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:17:17,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-24 23:17:17,457 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:17:17,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:17:17,458 INFO L82 PathProgramCache]: Analyzing trace with hash -555778251, now seen corresponding path program 1 times [2020-10-24 23:17:17,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 23:17:17,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557221720] [2020-10-24 23:17:17,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 23:17:17,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:17:17,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:17:17,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557221720] [2020-10-24 23:17:17,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:17:17,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 23:17:17,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687701766] [2020-10-24 23:17:17,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 23:17:17,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-24 23:17:17,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 23:17:17,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 23:17:17,523 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 4 states. [2020-10-24 23:17:17,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:17:17,616 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2020-10-24 23:17:17,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 23:17:17,618 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-24 23:17:17,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:17:17,619 INFO L225 Difference]: With dead ends: 43 [2020-10-24 23:17:17,619 INFO L226 Difference]: Without dead ends: 38 [2020-10-24 23:17:17,620 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 [2020-10-24 23:17:17,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-24 23:17:17,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 27. [2020-10-24 23:17:17,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-24 23:17:17,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2020-10-24 23:17:17,626 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 14 [2020-10-24 23:17:17,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:17:17,626 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2020-10-24 23:17:17,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 23:17:17,627 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2020-10-24 23:17:17,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-24 23:17:17,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:17:17,628 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:17:17,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-24 23:17:17,628 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:17:17,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:17:17,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1219229111, now seen corresponding path program 1 times [2020-10-24 23:17:17,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-24 23:17:17,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468859499] [2020-10-24 23:17:17,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 23:17:17,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 23:17:17,672 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 23:17:17,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 23:17:17,702 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 23:17:17,730 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-24 23:17:17,730 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-24 23:17:17,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-24 23:17:17,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 11:17:17 BoogieIcfgContainer [2020-10-24 23:17:17,770 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 23:17:17,770 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-24 23:17:17,770 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-24 23:17:17,771 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-24 23:17:17,771 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:17:16" (3/4) ... [2020-10-24 23:17:17,775 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-24 23:17:17,775 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-24 23:17:17,777 INFO L168 Benchmark]: Toolchain (without parser) took 2392.82 ms. Allocated memory was 52.4 MB in the beginning and 65.0 MB in the end (delta: 12.6 MB). Free memory was 29.9 MB in the beginning and 46.6 MB in the end (delta: -16.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 23:17:17,778 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 52.4 MB. Free memory is still 37.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 23:17:17,779 INFO L168 Benchmark]: CACSL2BoogieTranslator took 396.48 ms. Allocated memory is still 52.4 MB. Free memory was 29.3 MB in the beginning and 32.5 MB in the end (delta: -3.1 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. [2020-10-24 23:17:17,780 INFO L168 Benchmark]: Boogie Procedure Inliner took 76.38 ms. Allocated memory is still 52.4 MB. Free memory was 32.3 MB in the beginning and 30.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-24 23:17:17,781 INFO L168 Benchmark]: Boogie Preprocessor took 49.38 ms. Allocated memory is still 52.4 MB. Free memory was 30.6 MB in the beginning and 29.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-24 23:17:17,782 INFO L168 Benchmark]: RCFGBuilder took 496.69 ms. Allocated memory is still 52.4 MB. Free memory was 29.0 MB in the beginning and 23.7 MB in the end (delta: 5.3 MB). Peak memory consumption was 9.7 MB. Max. memory is 16.1 GB. [2020-10-24 23:17:17,786 INFO L168 Benchmark]: TraceAbstraction took 1355.19 ms. Allocated memory was 52.4 MB in the beginning and 65.0 MB in the end (delta: 12.6 MB). Free memory was 23.2 MB in the beginning and 47.1 MB in the end (delta: -23.9 MB). Peak memory consumption was 12.0 MB. Max. memory is 16.1 GB. [2020-10-24 23:17:17,786 INFO L168 Benchmark]: Witness Printer took 4.86 ms. Allocated memory is still 65.0 MB. Free memory was 47.1 MB in the beginning and 46.6 MB in the end (delta: 473.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 23:17:17,794 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 52.4 MB. Free memory is still 37.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 396.48 ms. Allocated memory is still 52.4 MB. Free memory was 29.3 MB in the beginning and 32.5 MB in the end (delta: -3.1 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 76.38 ms. Allocated memory is still 52.4 MB. Free memory was 32.3 MB in the beginning and 30.6 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 49.38 ms. Allocated memory is still 52.4 MB. Free memory was 30.6 MB in the beginning and 29.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 496.69 ms. Allocated memory is still 52.4 MB. Free memory was 29.0 MB in the beginning and 23.7 MB in the end (delta: 5.3 MB). Peak memory consumption was 9.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1355.19 ms. Allocated memory was 52.4 MB in the beginning and 65.0 MB in the end (delta: 12.6 MB). Free memory was 23.2 MB in the beginning and 47.1 MB in the end (delta: -23.9 MB). Peak memory consumption was 12.0 MB. Max. memory is 16.1 GB. * Witness Printer took 4.86 ms. Allocated memory is still 65.0 MB. Free memory was 47.1 MB in the beginning and 46.6 MB in the end (delta: 473.1 kB). There was no memory consumed. Max. memory is 16.1 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 18, overapproximation of someBinaryArithmeticDOUBLEoperation at line 69. Possible FailurePath: [L69] double x = 0.0 / 0.0; [L70] double y = 0.0 / 0.0; [L29] __uint32_t msw, lsw; [L32] ieee_double_shape_type ew_u; [L33] ew_u.value = (x) [L34] EXPR ew_u.parts.msw [L34] (msw) = ew_u.parts.msw [L35] EXPR ew_u.parts.lsw [L35] (lsw) = ew_u.parts.lsw [L38-L39] COND FALSE !((msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000)) [L41-L42] COND FALSE !((msw >= 0x00100000 && msw <= 0x7fefffff) || (msw >= 0x80100000 && msw <= 0xffefffff)) [L44-L45] COND FALSE !(( msw <= 0x000fffff) || (msw >= 0x80000000 && msw <= 0x800fffff)) [L48-L49] COND FALSE !((msw == 0x7ff00000 && lsw == 0x00000000) || (msw == 0xfff00000 && lsw == 0x00000000)) [L52] return 0; [L57] COND TRUE __fpclassify_double(x) == 0 [L58] return y; [L71] double res = fmax_double(x, y); [L18] return x != x; [L73] COND TRUE !isnan_double(res) [L3] __assert_fail("0", "double_req_bl_1250.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.2s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 206 SDtfs, 44 SDslu, 238 SDs, 0 SdLazy, 84 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s 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=29occurred 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, 44 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 74 NumberOfCodeBlocks, 74 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 55 ConstructedInterpolants, 0 QuantifiedInterpolants, 799 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-a4ecdab [2020-10-24 23:17:20,142 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 23:17:20,145 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 23:17:20,197 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-24 23:17:20,197 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-24 23:17:20,204 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-24 23:17:20,206 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-24 23:17:20,213 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-24 23:17:20,220 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-24 23:17:20,222 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-24 23:17:20,224 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-24 23:17:20,226 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-24 23:17:20,227 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 23:17:20,234 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 23:17:20,236 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 23:17:20,237 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 23:17:20,238 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 23:17:20,241 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 23:17:20,245 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 23:17:20,251 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 23:17:20,253 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 23:17:20,255 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 23:17:20,256 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 23:17:20,257 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 23:17:20,264 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-24 23:17:20,265 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-24 23:17:20,265 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-24 23:17:20,266 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-24 23:17:20,267 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-24 23:17:20,269 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-24 23:17:20,269 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-24 23:17:20,270 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-24 23:17:20,272 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-24 23:17:20,273 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-24 23:17:20,274 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-24 23:17:20,274 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-24 23:17:20,275 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-24 23:17:20,275 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-24 23:17:20,276 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 23:17:20,278 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 23:17:20,278 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 23:17:20,279 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2020-10-24 23:17:20,340 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 23:17:20,341 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 23:17:20,344 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-24 23:17:20,344 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-24 23:17:20,344 INFO L138 SettingsManager]: * Use SBE=true [2020-10-24 23:17:20,345 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 23:17:20,345 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 23:17:20,345 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 23:17:20,345 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 23:17:20,345 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 23:17:20,346 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 23:17:20,347 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 23:17:20,347 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-24 23:17:20,347 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-24 23:17:20,347 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 23:17:20,347 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 23:17:20,347 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 23:17:20,348 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 23:17:20,348 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 23:17:20,348 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-24 23:17:20,348 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 23:17:20,348 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 23:17:20,349 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 23:17:20,349 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 23:17:20,349 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-24 23:17:20,349 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-24 23:17:20,349 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-24 23:17:20,350 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-24 23:17:20,350 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 23:17:20,350 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-24 23:17:20,350 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-24 23:17:20,350 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 216b013ad4da4eb5e85a87de58b407e30252b4c5 [2020-10-24 23:17:20,793 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 23:17:20,822 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 23:17:20,825 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 23:17:20,827 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 23:17:20,827 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 23:17:20,828 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/double_req_bl_1250.c [2020-10-24 23:17:20,908 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5265727db/65a75cf5cce546b0b29f14af0c5d4d0e/FLAGb10d49bfd [2020-10-24 23:17:21,490 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 23:17:21,501 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/double_req_bl_1250.c [2020-10-24 23:17:21,523 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5265727db/65a75cf5cce546b0b29f14af0c5d4d0e/FLAGb10d49bfd [2020-10-24 23:17:21,836 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5265727db/65a75cf5cce546b0b29f14af0c5d4d0e [2020-10-24 23:17:21,839 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 23:17:21,845 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-24 23:17:21,847 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 23:17:21,847 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 23:17:21,851 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 23:17:21,851 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:17:21" (1/1) ... [2020-10-24 23:17:21,855 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f539199 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:21, skipping insertion in model container [2020-10-24 23:17:21,855 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 11:17:21" (1/1) ... [2020-10-24 23:17:21,868 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 23:17:21,887 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 23:17:22,064 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 23:17:22,078 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 23:17:22,132 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 23:17:22,172 INFO L208 MainTranslator]: Completed translation [2020-10-24 23:17:22,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:22 WrapperNode [2020-10-24 23:17:22,172 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 23:17:22,173 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-24 23:17:22,174 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-24 23:17:22,174 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-24 23:17:22,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:22" (1/1) ... [2020-10-24 23:17:22,193 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:22" (1/1) ... [2020-10-24 23:17:22,219 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-24 23:17:22,220 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 23:17:22,220 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 23:17:22,220 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 23:17:22,230 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:22" (1/1) ... [2020-10-24 23:17:22,230 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:22" (1/1) ... [2020-10-24 23:17:22,235 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:22" (1/1) ... [2020-10-24 23:17:22,236 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:22" (1/1) ... [2020-10-24 23:17:22,248 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:22" (1/1) ... [2020-10-24 23:17:22,253 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:22" (1/1) ... [2020-10-24 23:17:22,259 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:22" (1/1) ... [2020-10-24 23:17:22,263 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 23:17:22,264 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 23:17:22,264 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 23:17:22,264 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 23:17:22,265 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 23:17:22,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2020-10-24 23:17:22,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-24 23:17:22,341 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 23:17:22,341 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-10-24 23:17:22,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 23:17:22,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 23:17:22,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 23:17:22,746 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 23:17:22,747 INFO L298 CfgBuilder]: Removed 18 assume(true) statements. [2020-10-24 23:17:22,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:17:22 BoogieIcfgContainer [2020-10-24 23:17:22,749 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 23:17:22,751 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 23:17:22,751 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 23:17:22,766 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 23:17:22,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 11:17:21" (1/3) ... [2020-10-24 23:17:22,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36854372 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:17:22, skipping insertion in model container [2020-10-24 23:17:22,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 11:17:22" (2/3) ... [2020-10-24 23:17:22,769 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36854372 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 11:17:22, skipping insertion in model container [2020-10-24 23:17:22,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:17:22" (3/3) ... [2020-10-24 23:17:22,771 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1250.c [2020-10-24 23:17:22,784 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-24 23:17:22,788 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 23:17:22,802 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 23:17:22,834 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 23:17:22,834 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 23:17:22,835 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-24 23:17:22,835 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 23:17:22,835 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 23:17:22,835 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 23:17:22,836 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 23:17:22,836 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 23:17:22,850 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-24 23:17:22,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-24 23:17:22,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:17:22,857 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:17:22,858 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:17:22,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:17:22,865 INFO L82 PathProgramCache]: Analyzing trace with hash -958093107, now seen corresponding path program 1 times [2020-10-24 23:17:22,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 23:17:22,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [121351758] [2020-10-24 23:17:22,880 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 [2020-10-24 23:17:22,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:17:23,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-24 23:17:23,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 23:17:23,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:17:23,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 23:17:23,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:17:23,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [121351758] [2020-10-24 23:17:23,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:17:23,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-24 23:17:23,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207913511] [2020-10-24 23:17:23,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-24 23:17:23,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 23:17:23,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-24 23:17:23,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-24 23:17:23,056 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2020-10-24 23:17:23,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:17:23,075 INFO L93 Difference]: Finished difference Result 55 states and 85 transitions. [2020-10-24 23:17:23,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-24 23:17:23,077 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-24 23:17:23,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:17:23,088 INFO L225 Difference]: With dead ends: 55 [2020-10-24 23:17:23,088 INFO L226 Difference]: Without dead ends: 25 [2020-10-24 23:17:23,096 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 [2020-10-24 23:17:23,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-24 23:17:23,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-24 23:17:23,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-24 23:17:23,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 35 transitions. [2020-10-24 23:17:23,136 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 35 transitions. Word has length 10 [2020-10-24 23:17:23,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:17:23,136 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 35 transitions. [2020-10-24 23:17:23,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-24 23:17:23,137 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 35 transitions. [2020-10-24 23:17:23,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-24 23:17:23,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:17:23,138 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:17:23,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-24 23:17:23,354 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:17:23,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:17:23,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1001566992, now seen corresponding path program 1 times [2020-10-24 23:17:23,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 23:17:23,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [917442472] [2020-10-24 23:17:23,361 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 [2020-10-24 23:17:23,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:17:23,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-24 23:17:23,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 23:17:23,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:17:23,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 23:17:23,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:17:23,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [917442472] [2020-10-24 23:17:23,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:17:23,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-10-24 23:17:23,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281904561] [2020-10-24 23:17:23,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-24 23:17:23,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 23:17:23,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-24 23:17:23,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-24 23:17:23,539 INFO L87 Difference]: Start difference. First operand 25 states and 35 transitions. Second operand 6 states. [2020-10-24 23:17:23,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:17:23,653 INFO L93 Difference]: Finished difference Result 52 states and 65 transitions. [2020-10-24 23:17:23,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-24 23:17:23,653 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-10-24 23:17:23,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:17:23,655 INFO L225 Difference]: With dead ends: 52 [2020-10-24 23:17:23,655 INFO L226 Difference]: Without dead ends: 47 [2020-10-24 23:17:23,656 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 [2020-10-24 23:17:23,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-24 23:17:23,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 27. [2020-10-24 23:17:23,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-24 23:17:23,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2020-10-24 23:17:23,668 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 11 [2020-10-24 23:17:23,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:17:23,669 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2020-10-24 23:17:23,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-24 23:17:23,669 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2020-10-24 23:17:23,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-24 23:17:23,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:17:23,670 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:17:23,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-24 23:17:23,872 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:17:23,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:17:23,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1219229111, now seen corresponding path program 1 times [2020-10-24 23:17:23,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 23:17:23,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1846577372] [2020-10-24 23:17:23,876 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 [2020-10-24 23:17:23,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:17:23,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-24 23:17:23,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 23:17:24,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:17:24,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 23:17:24,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:17:24,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1846577372] [2020-10-24 23:17:24,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:17:24,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2020-10-24 23:17:24,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923252364] [2020-10-24 23:17:24,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-24 23:17:24,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 23:17:24,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-24 23:17:24,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-24 23:17:24,213 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 10 states. [2020-10-24 23:17:24,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:17:24,656 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2020-10-24 23:17:24,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-24 23:17:24,657 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-24 23:17:24,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:17:24,659 INFO L225 Difference]: With dead ends: 36 [2020-10-24 23:17:24,659 INFO L226 Difference]: Without dead ends: 27 [2020-10-24 23:17:24,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-24 23:17:24,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-24 23:17:24,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-10-24 23:17:24,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-24 23:17:24,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2020-10-24 23:17:24,666 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 14 [2020-10-24 23:17:24,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:17:24,666 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2020-10-24 23:17:24,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-24 23:17:24,666 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2020-10-24 23:17:24,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-24 23:17:24,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:17:24,667 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:17:24,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-24 23:17:24,880 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:17:24,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:17:24,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1012428811, now seen corresponding path program 1 times [2020-10-24 23:17:24,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 23:17:24,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [285677636] [2020-10-24 23:17:24,883 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 [2020-10-24 23:17:25,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:17:25,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-24 23:17:25,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 23:17:25,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:17:25,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 23:17:25,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:17:25,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [285677636] [2020-10-24 23:17:25,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:17:25,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-10-24 23:17:25,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111903697] [2020-10-24 23:17:25,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-24 23:17:25,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 23:17:25,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-24 23:17:25,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-24 23:17:25,063 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand 6 states. [2020-10-24 23:17:25,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:17:25,200 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-10-24 23:17:25,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-24 23:17:25,201 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-24 23:17:25,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:17:25,203 INFO L225 Difference]: With dead ends: 52 [2020-10-24 23:17:25,203 INFO L226 Difference]: Without dead ends: 47 [2020-10-24 23:17:25,203 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 [2020-10-24 23:17:25,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-24 23:17:25,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 27. [2020-10-24 23:17:25,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-24 23:17:25,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 35 transitions. [2020-10-24 23:17:25,210 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 35 transitions. Word has length 16 [2020-10-24 23:17:25,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:17:25,210 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 35 transitions. [2020-10-24 23:17:25,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-24 23:17:25,211 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 35 transitions. [2020-10-24 23:17:25,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-24 23:17:25,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:17:25,212 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:17:25,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-10-24 23:17:25,413 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:17:25,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:17:25,415 INFO L82 PathProgramCache]: Analyzing trace with hash -356841937, now seen corresponding path program 1 times [2020-10-24 23:17:25,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 23:17:25,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [772370639] [2020-10-24 23:17:25,416 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 [2020-10-24 23:17:25,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:17:25,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-24 23:17:25,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 23:17:25,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:17:25,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 23:17:25,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:17:25,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [772370639] [2020-10-24 23:17:25,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:17:25,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2020-10-24 23:17:25,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234237519] [2020-10-24 23:17:25,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-24 23:17:25,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 23:17:25,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-24 23:17:25,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-24 23:17:25,887 INFO L87 Difference]: Start difference. First operand 27 states and 35 transitions. Second operand 12 states. [2020-10-24 23:17:26,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:17:26,436 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2020-10-24 23:17:26,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-24 23:17:26,437 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2020-10-24 23:17:26,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:17:26,438 INFO L225 Difference]: With dead ends: 32 [2020-10-24 23:17:26,438 INFO L226 Difference]: Without dead ends: 23 [2020-10-24 23:17:26,439 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2020-10-24 23:17:26,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-24 23:17:26,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-24 23:17:26,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-24 23:17:26,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-10-24 23:17:26,444 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 18 [2020-10-24 23:17:26,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:17:26,444 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-10-24 23:17:26,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-24 23:17:26,444 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-10-24 23:17:26,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-24 23:17:26,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 23:17:26,445 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 23:17:26,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-10-24 23:17:26,655 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 23:17:26,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 23:17:26,657 INFO L82 PathProgramCache]: Analyzing trace with hash -208376157, now seen corresponding path program 1 times [2020-10-24 23:17:26,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-24 23:17:26,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1006751500] [2020-10-24 23:17:26,658 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 [2020-10-24 23:17:26,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 23:17:26,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-24 23:17:26,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-24 23:17:26,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:17:26,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-24 23:17:26,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 23:17:26,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1006751500] [2020-10-24 23:17:26,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-24 23:17:26,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2020-10-24 23:17:26,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086958715] [2020-10-24 23:17:26,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-24 23:17:26,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-24 23:17:26,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-24 23:17:26,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-24 23:17:26,985 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 10 states. [2020-10-24 23:17:27,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 23:17:27,235 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2020-10-24 23:17:27,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-24 23:17:27,235 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2020-10-24 23:17:27,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 23:17:27,235 INFO L225 Difference]: With dead ends: 23 [2020-10-24 23:17:27,235 INFO L226 Difference]: Without dead ends: 0 [2020-10-24 23:17:27,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-24 23:17:27,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-24 23:17:27,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-24 23:17:27,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-24 23:17:27,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-24 23:17:27,237 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2020-10-24 23:17:27,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 23:17:27,237 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-24 23:17:27,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-24 23:17:27,237 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-24 23:17:27,237 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-24 23:17:27,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-10-24 23:17:27,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-24 23:17:27,725 INFO L274 CegarLoopResult]: For program point L31-1(lines 31 36) no Hoare annotation was computed. [2020-10-24 23:17:27,726 INFO L270 CegarLoopResult]: At program point L31-2(lines 31 36) the Hoare annotation is: (and (not (fp.eq ULTIMATE.start_fmax_double_~y ULTIMATE.start_fmax_double_~y)) (not (fp.eq ULTIMATE.start_fmax_double_~x ULTIMATE.start_fmax_double_~x))) [2020-10-24 23:17:27,726 INFO L274 CegarLoopResult]: For program point L31-3(lines 28 53) no Hoare annotation was computed. [2020-10-24 23:17:27,726 INFO L274 CegarLoopResult]: For program point L31-5(lines 31 36) no Hoare annotation was computed. [2020-10-24 23:17:27,726 INFO L270 CegarLoopResult]: At program point L31-6(lines 31 36) the Hoare annotation is: (and (not (fp.eq ULTIMATE.start_fmax_double_~y ULTIMATE.start_fmax_double_~y)) (not (fp.eq ULTIMATE.start_fmax_double_~x ULTIMATE.start_fmax_double_~x))) [2020-10-24 23:17:27,726 INFO L274 CegarLoopResult]: For program point L31-7(lines 28 53) no Hoare annotation was computed. [2020-10-24 23:17:27,726 INFO L270 CegarLoopResult]: At program point L52(lines 28 53) the Hoare annotation is: (and (not (fp.eq ULTIMATE.start_fmax_double_~x ULTIMATE.start_fmax_double_~x)) (not (fp.eq ULTIMATE.start_fmax_double_~y ULTIMATE.start_fmax_double_~y))) [2020-10-24 23:17:27,727 INFO L270 CegarLoopResult]: At program point L52-1(lines 28 53) the Hoare annotation is: (let ((.cse0 (not (fp.eq ULTIMATE.start_fmax_double_~y ULTIMATE.start_fmax_double_~y)))) (or (and .cse0 (not (fp.eq ULTIMATE.start_fmax_double_~x ULTIMATE.start_fmax_double_~x))) (and .cse0 (not (= (_ bv0 32) |ULTIMATE.start___fpclassify_double_#res|))))) [2020-10-24 23:17:27,727 INFO L274 CegarLoopResult]: For program point L48(lines 48 52) no Hoare annotation was computed. [2020-10-24 23:17:27,727 INFO L274 CegarLoopResult]: For program point L48-1(lines 48 52) no Hoare annotation was computed. [2020-10-24 23:17:27,727 INFO L277 CegarLoopResult]: At program point L77(lines 65 78) the Hoare annotation is: true [2020-10-24 23:17:27,727 INFO L274 CegarLoopResult]: For program point L44(lines 44 52) no Hoare annotation was computed. [2020-10-24 23:17:27,727 INFO L274 CegarLoopResult]: For program point L44-1(lines 44 52) no Hoare annotation was computed. [2020-10-24 23:17:27,727 INFO L274 CegarLoopResult]: For program point L73(lines 73 76) no Hoare annotation was computed. [2020-10-24 23:17:27,727 INFO L274 CegarLoopResult]: For program point L3(line 3) no Hoare annotation was computed. [2020-10-24 23:17:27,727 INFO L274 CegarLoopResult]: For program point L3-1(line 3) no Hoare annotation was computed. [2020-10-24 23:17:27,728 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-10-24 23:17:27,728 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-10-24 23:17:27,728 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-24 23:17:27,728 INFO L274 CegarLoopResult]: For program point L57(lines 57 58) no Hoare annotation was computed. [2020-10-24 23:17:27,728 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-24 23:17:27,728 INFO L274 CegarLoopResult]: For program point L41(lines 41 52) no Hoare annotation was computed. [2020-10-24 23:17:27,728 INFO L274 CegarLoopResult]: For program point L41-1(lines 41 52) no Hoare annotation was computed. [2020-10-24 23:17:27,728 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-24 23:17:27,729 INFO L274 CegarLoopResult]: For program point L62(line 62) no Hoare annotation was computed. [2020-10-24 23:17:27,729 INFO L274 CegarLoopResult]: For program point L62-2(line 62) no Hoare annotation was computed. [2020-10-24 23:17:27,729 INFO L270 CegarLoopResult]: At program point L62-3(lines 55 63) the Hoare annotation is: (and (exists ((currentRoundingMode RoundingMode)) (= (fp.div currentRoundingMode (_ +zero 11 53) (_ +zero 11 53)) ULTIMATE.start_fmax_double_~y)) (not (fp.eq |ULTIMATE.start_fmax_double_#res| |ULTIMATE.start_fmax_double_#res|))) [2020-10-24 23:17:27,729 INFO L274 CegarLoopResult]: For program point L59(lines 59 60) no Hoare annotation was computed. [2020-10-24 23:17:27,729 INFO L270 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: (and (exists ((currentRoundingMode RoundingMode)) (= (fp.div currentRoundingMode (_ +zero 11 53) (_ +zero 11 53)) ULTIMATE.start_fmax_double_~y)) (not (fp.eq |ULTIMATE.start_fmax_double_#res| |ULTIMATE.start_fmax_double_#res|)) (= (_ bv1 32) |ULTIMATE.start_isnan_double_#res|)) [2020-10-24 23:17:27,736 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] [2020-10-24 23:17:27,745 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] [2020-10-24 23:17:27,747 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] [2020-10-24 23:17:27,747 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] [2020-10-24 23:17:27,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 11:17:27 BoogieIcfgContainer [2020-10-24 23:17:27,751 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 23:17:27,752 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-24 23:17:27,752 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-24 23:17:27,753 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-24 23:17:27,753 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 11:17:22" (3/4) ... [2020-10-24 23:17:27,757 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-24 23:17:27,770 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2020-10-24 23:17:27,770 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-10-24 23:17:27,771 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-10-24 23:17:27,771 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-24 23:17:27,805 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (\exists currentRoundingMode : FloatRoundingMode :: ~fp.div~DOUBLE(currentRoundingMode, ~Pluszero~LONGDOUBLE(), ~Pluszero~LONGDOUBLE()) == y) && !~fp.eq~DOUBLE(\result, \result) [2020-10-24 23:17:27,806 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((\exists currentRoundingMode : FloatRoundingMode :: ~fp.div~DOUBLE(currentRoundingMode, ~Pluszero~LONGDOUBLE(), ~Pluszero~LONGDOUBLE()) == y) && !~fp.eq~DOUBLE(\result, \result)) && 1bv32 == \result [2020-10-24 23:17:27,806 WARN L221 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (!~fp.eq~DOUBLE(y, y) && !~fp.eq~DOUBLE(x, x)) || (!~fp.eq~DOUBLE(y, y) && !(0bv32 == \result)) [2020-10-24 23:17:27,842 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-24 23:17:27,842 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-24 23:17:27,845 INFO L168 Benchmark]: Toolchain (without parser) took 6002.30 ms. Allocated memory was 48.2 MB in the beginning and 60.8 MB in the end (delta: 12.6 MB). Free memory was 31.3 MB in the beginning and 40.8 MB in the end (delta: -9.5 MB). Peak memory consumption was 28.3 MB. Max. memory is 16.1 GB. [2020-10-24 23:17:27,845 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 37.7 MB. Free memory was 22.3 MB in the beginning and 22.3 MB in the end (delta: 42.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 23:17:27,846 INFO L168 Benchmark]: CACSL2BoogieTranslator took 326.02 ms. Allocated memory is still 48.2 MB. Free memory was 30.5 MB in the beginning and 31.4 MB in the end (delta: -885.0 kB). Peak memory consumption was 11.4 MB. Max. memory is 16.1 GB. [2020-10-24 23:17:27,847 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.00 ms. Allocated memory is still 48.2 MB. Free memory was 31.2 MB in the beginning and 29.5 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-10-24 23:17:27,847 INFO L168 Benchmark]: Boogie Preprocessor took 42.57 ms. Allocated memory is still 48.2 MB. Free memory was 29.5 MB in the beginning and 27.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-24 23:17:27,848 INFO L168 Benchmark]: RCFGBuilder took 485.92 ms. Allocated memory is still 48.2 MB. Free memory was 27.9 MB in the beginning and 19.8 MB in the end (delta: 8.1 MB). Peak memory consumption was 11.7 MB. Max. memory is 16.1 GB. [2020-10-24 23:17:27,849 INFO L168 Benchmark]: TraceAbstraction took 5000.26 ms. Allocated memory was 48.2 MB in the beginning and 60.8 MB in the end (delta: 12.6 MB). Free memory was 19.3 MB in the beginning and 19.2 MB in the end (delta: 123.1 kB). Peak memory consumption was 13.7 MB. Max. memory is 16.1 GB. [2020-10-24 23:17:27,849 INFO L168 Benchmark]: Witness Printer took 90.00 ms. Allocated memory is still 60.8 MB. Free memory was 19.2 MB in the beginning and 40.8 MB in the end (delta: -21.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-10-24 23:17:27,853 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 37.7 MB. Free memory was 22.3 MB in the beginning and 22.3 MB in the end (delta: 42.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 326.02 ms. Allocated memory is still 48.2 MB. Free memory was 30.5 MB in the beginning and 31.4 MB in the end (delta: -885.0 kB). Peak memory consumption was 11.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 46.00 ms. Allocated memory is still 48.2 MB. Free memory was 31.2 MB in the beginning and 29.5 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 42.57 ms. Allocated memory is still 48.2 MB. Free memory was 29.5 MB in the beginning and 27.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 485.92 ms. Allocated memory is still 48.2 MB. Free memory was 27.9 MB in the beginning and 19.8 MB in the end (delta: 8.1 MB). Peak memory consumption was 11.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5000.26 ms. Allocated memory was 48.2 MB in the beginning and 60.8 MB in the end (delta: 12.6 MB). Free memory was 19.3 MB in the beginning and 19.2 MB in the end (delta: 123.1 kB). Peak memory consumption was 13.7 MB. Max. memory is 16.1 GB. * Witness Printer took 90.00 ms. Allocated memory is still 60.8 MB. Free memory was 19.2 MB in the beginning and 40.8 MB in the end (delta: -21.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] - GenericResult: Unfinished Backtranslation Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 55]: Loop Invariant [2020-10-24 23:17:27,863 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] [2020-10-24 23:17:27,863 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] Derived loop invariant: (\exists currentRoundingMode : FloatRoundingMode :: ~fp.div~DOUBLE(currentRoundingMode, ~Pluszero~LONGDOUBLE(), ~Pluszero~LONGDOUBLE()) == y) && !~fp.eq~DOUBLE(\result, \result) - InvariantResult [Line: 18]: Loop Invariant [2020-10-24 23:17:27,864 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] [2020-10-24 23:17:27,864 WARN L417 cessorBacktranslator]: Identifier is quantified, using identity as back-translation of IdentifierExpression[currentRoundingMode,QUANTIFIED] Derived loop invariant: ((\exists currentRoundingMode : FloatRoundingMode :: ~fp.div~DOUBLE(currentRoundingMode, ~Pluszero~LONGDOUBLE(), ~Pluszero~LONGDOUBLE()) == y) && !~fp.eq~DOUBLE(\result, \result)) && 1bv32 == \result - InvariantResult [Line: 65]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 31]: Loop Invariant Derived loop invariant: !~fp.eq~DOUBLE(y, y) && !~fp.eq~DOUBLE(x, x) - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: (!~fp.eq~DOUBLE(y, y) && !~fp.eq~DOUBLE(x, x)) || (!~fp.eq~DOUBLE(y, y) && !(0bv32 == \result)) - InvariantResult [Line: 31]: Loop Invariant Derived loop invariant: !~fp.eq~DOUBLE(y, y) && !~fp.eq~DOUBLE(x, x) - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: !~fp.eq~DOUBLE(x, x) && !~fp.eq~DOUBLE(y, y) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.6s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 182 SDtfs, 117 SDslu, 549 SDs, 0 SdLazy, 138 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 181 GetRequests, 130 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 7 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred 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, 6 MinimizatonAttempts, 42 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 19 NumberOfFragments, 74 HoareAnnotationTreeSize, 7 FomulaSimplifications, 184 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 39 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 88 NumberOfCodeBlocks, 88 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 164 ConstructedInterpolants, 36 QuantifiedInterpolants, 8416 SizeOfPredicates, 32 NumberOfNonLiveVariables, 399 ConjunctsInSsa, 38 ConjunctsInUnsatCore, 12 InterpolantComputations, 12 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 correct! Received shutdown request...