./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-newlib/double_req_bl_1252b.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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_1252b.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 72e6a731e5f93184d8452e046ba5fa07483889ea5d4b2985d4608011d07f1d55 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 01:48:51,909 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 01:48:51,911 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 01:48:51,952 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 01:48:51,953 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 01:48:51,954 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 01:48:51,957 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 01:48:51,960 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 01:48:51,962 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 01:48:51,966 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 01:48:51,967 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 01:48:51,969 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 01:48:51,969 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 01:48:51,971 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 01:48:51,972 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 01:48:51,976 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 01:48:51,977 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 01:48:51,978 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 01:48:51,980 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 01:48:51,984 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 01:48:51,986 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 01:48:51,987 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 01:48:51,989 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 01:48:51,989 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 01:48:51,991 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 01:48:51,996 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 01:48:51,997 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 01:48:51,997 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 01:48:51,998 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 01:48:51,998 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 01:48:51,999 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 01:48:51,999 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 01:48:52,001 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 01:48:52,001 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 01:48:52,002 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 01:48:52,003 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 01:48:52,003 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 01:48:52,004 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 01:48:52,004 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 01:48:52,004 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 01:48:52,005 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 01:48:52,006 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 01:48:52,013 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 01:48:52,040 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 01:48:52,040 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 01:48:52,040 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 01:48:52,041 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 01:48:52,041 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 01:48:52,041 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 01:48:52,042 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 01:48:52,042 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 01:48:52,042 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 01:48:52,043 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 01:48:52,043 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 01:48:52,044 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 01:48:52,044 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 01:48:52,044 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 01:48:52,044 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 01:48:52,044 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 01:48:52,044 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 01:48:52,045 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 01:48:52,045 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 01:48:52,045 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 01:48:52,045 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 01:48:52,045 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 01:48:52,046 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 01:48:52,046 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 01:48:52,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 01:48:52,046 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 01:48:52,046 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 01:48:52,046 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 01:48:52,046 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 01:48:52,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 01:48:52,047 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 01:48:52,047 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 01:48:52,047 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 01:48:52,048 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 72e6a731e5f93184d8452e046ba5fa07483889ea5d4b2985d4608011d07f1d55 [2022-07-21 01:48:52,305 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 01:48:52,323 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 01:48:52,325 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 01:48:52,326 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 01:48:52,326 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 01:48:52,327 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/double_req_bl_1252b.c [2022-07-21 01:48:52,380 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41b435cb9/d28840184b6644989a48d3b33db75b9a/FLAG6b524135d [2022-07-21 01:48:52,750 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 01:48:52,750 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/double_req_bl_1252b.c [2022-07-21 01:48:52,758 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41b435cb9/d28840184b6644989a48d3b33db75b9a/FLAG6b524135d [2022-07-21 01:48:52,773 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41b435cb9/d28840184b6644989a48d3b33db75b9a [2022-07-21 01:48:52,775 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 01:48:52,776 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 01:48:52,778 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 01:48:52,778 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 01:48:52,781 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 01:48:52,781 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:48:52" (1/1) ... [2022-07-21 01:48:52,782 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42bbb2b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:48:52, skipping insertion in model container [2022-07-21 01:48:52,782 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:48:52" (1/1) ... [2022-07-21 01:48:52,788 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 01:48:52,801 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 01:48:52,949 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/double_req_bl_1252b.c[2154,2167] [2022-07-21 01:48:52,983 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 01:48:52,988 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 01:48:53,026 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/double_req_bl_1252b.c[2154,2167] [2022-07-21 01:48:53,028 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 01:48:53,037 INFO L208 MainTranslator]: Completed translation [2022-07-21 01:48:53,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:48:53 WrapperNode [2022-07-21 01:48:53,038 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 01:48:53,039 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 01:48:53,039 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 01:48:53,039 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 01:48:53,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:48:53" (1/1) ... [2022-07-21 01:48:53,056 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:48:53" (1/1) ... [2022-07-21 01:48:53,074 INFO L137 Inliner]: procedures = 18, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 67 [2022-07-21 01:48:53,074 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 01:48:53,075 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 01:48:53,075 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 01:48:53,075 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 01:48:53,081 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:48:53" (1/1) ... [2022-07-21 01:48:53,081 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:48:53" (1/1) ... [2022-07-21 01:48:53,087 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:48:53" (1/1) ... [2022-07-21 01:48:53,087 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:48:53" (1/1) ... [2022-07-21 01:48:53,102 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:48:53" (1/1) ... [2022-07-21 01:48:53,107 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:48:53" (1/1) ... [2022-07-21 01:48:53,111 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:48:53" (1/1) ... [2022-07-21 01:48:53,113 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 01:48:53,115 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 01:48:53,116 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 01:48:53,116 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 01:48:53,117 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:48:53" (1/1) ... [2022-07-21 01:48:53,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 01:48:53,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 01:48:53,155 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 01:48:53,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 01:48:53,187 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 01:48:53,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 01:48:53,188 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 01:48:53,188 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_double [2022-07-21 01:48:53,188 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_double [2022-07-21 01:48:53,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2022-07-21 01:48:53,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 01:48:53,188 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 01:48:53,189 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 01:48:53,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 01:48:53,257 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 01:48:53,258 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 01:48:53,418 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 01:48:53,432 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 01:48:53,433 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-21 01:48:53,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:48:53 BoogieIcfgContainer [2022-07-21 01:48:53,435 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 01:48:53,436 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 01:48:53,437 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 01:48:53,439 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 01:48:53,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:48:52" (1/3) ... [2022-07-21 01:48:53,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dda2a85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:48:53, skipping insertion in model container [2022-07-21 01:48:53,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:48:53" (2/3) ... [2022-07-21 01:48:53,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dda2a85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:48:53, skipping insertion in model container [2022-07-21 01:48:53,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:48:53" (3/3) ... [2022-07-21 01:48:53,442 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1252b.c [2022-07-21 01:48:53,468 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 01:48:53,469 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 01:48:53,518 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 01:48:53,523 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@44371598, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@586d8028 [2022-07-21 01:48:53,523 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 01:48:53,527 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 27 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 01:48:53,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-21 01:48:53,532 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:48:53,533 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:48:53,533 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:48:53,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:48:53,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1634587165, now seen corresponding path program 1 times [2022-07-21 01:48:53,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 01:48:53,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936466192] [2022-07-21 01:48:53,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:48:53,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 01:48:53,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:48:53,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 01:48:53,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:48:53,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 01:48:53,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 01:48:53,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936466192] [2022-07-21 01:48:53,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936466192] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:48:53,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:48:53,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 01:48:53,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545826292] [2022-07-21 01:48:53,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:48:53,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 01:48:53,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 01:48:53,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 01:48:53,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 01:48:53,750 INFO L87 Difference]: Start difference. First operand has 31 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 27 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 01:48:53,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:48:53,790 INFO L93 Difference]: Finished difference Result 59 states and 86 transitions. [2022-07-21 01:48:53,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 01:48:53,793 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-07-21 01:48:53,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:48:53,797 INFO L225 Difference]: With dead ends: 59 [2022-07-21 01:48:53,798 INFO L226 Difference]: Without dead ends: 28 [2022-07-21 01:48:53,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 01:48:53,804 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 1 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 01:48:53,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 71 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 01:48:53,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-07-21 01:48:53,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-07-21 01:48:53,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 01:48:53,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2022-07-21 01:48:53,838 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 14 [2022-07-21 01:48:53,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:48:53,839 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2022-07-21 01:48:53,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 01:48:53,840 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2022-07-21 01:48:53,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-21 01:48:53,842 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:48:53,842 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:48:53,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 01:48:53,843 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:48:53,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:48:53,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1992797582, now seen corresponding path program 1 times [2022-07-21 01:48:53,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 01:48:53,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834750030] [2022-07-21 01:48:53,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:48:53,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 01:48:53,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:48:53,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 01:48:53,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:48:53,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 01:48:53,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 01:48:53,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834750030] [2022-07-21 01:48:53,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834750030] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:48:53,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:48:53,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 01:48:53,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403114709] [2022-07-21 01:48:53,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:48:53,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 01:48:53,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 01:48:53,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 01:48:53,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 01:48:53,994 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 01:48:54,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:48:54,030 INFO L93 Difference]: Finished difference Result 41 states and 51 transitions. [2022-07-21 01:48:54,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 01:48:54,031 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-07-21 01:48:54,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:48:54,034 INFO L225 Difference]: With dead ends: 41 [2022-07-21 01:48:54,034 INFO L226 Difference]: Without dead ends: 32 [2022-07-21 01:48:54,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 01:48:54,039 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 1 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 01:48:54,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 118 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 01:48:54,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-21 01:48:54,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-07-21 01:48:54,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 01:48:54,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-07-21 01:48:54,053 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 15 [2022-07-21 01:48:54,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:48:54,054 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-07-21 01:48:54,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 01:48:54,055 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-07-21 01:48:54,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-21 01:48:54,056 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:48:54,059 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:48:54,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 01:48:54,059 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:48:54,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:48:54,060 INFO L85 PathProgramCache]: Analyzing trace with hash -118167546, now seen corresponding path program 1 times [2022-07-21 01:48:54,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 01:48:54,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421846180] [2022-07-21 01:48:54,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:48:54,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 01:48:54,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:48:54,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 01:48:54,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:48:54,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 01:48:54,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 01:48:54,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421846180] [2022-07-21 01:48:54,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421846180] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:48:54,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:48:54,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 01:48:54,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380689545] [2022-07-21 01:48:54,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:48:54,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 01:48:54,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 01:48:54,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 01:48:54,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 01:48:54,117 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 01:48:54,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:48:54,142 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2022-07-21 01:48:54,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 01:48:54,142 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-07-21 01:48:54,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:48:54,143 INFO L225 Difference]: With dead ends: 45 [2022-07-21 01:48:54,143 INFO L226 Difference]: Without dead ends: 36 [2022-07-21 01:48:54,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 01:48:54,144 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 1 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 01:48:54,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 134 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 01:48:54,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-21 01:48:54,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2022-07-21 01:48:54,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 01:48:54,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-07-21 01:48:54,149 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 16 [2022-07-21 01:48:54,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:48:54,149 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-07-21 01:48:54,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 01:48:54,149 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-07-21 01:48:54,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-21 01:48:54,153 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:48:54,153 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:48:54,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 01:48:54,154 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:48:54,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:48:54,154 INFO L85 PathProgramCache]: Analyzing trace with hash -774061834, now seen corresponding path program 1 times [2022-07-21 01:48:54,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 01:48:54,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003715422] [2022-07-21 01:48:54,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:48:54,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 01:48:54,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:48:54,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 01:48:54,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:48:54,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 01:48:54,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 01:48:54,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003715422] [2022-07-21 01:48:54,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003715422] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:48:54,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:48:54,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 01:48:54,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028876649] [2022-07-21 01:48:54,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:48:54,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 01:48:54,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 01:48:54,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 01:48:54,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 01:48:54,209 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 01:48:54,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:48:54,235 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2022-07-21 01:48:54,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 01:48:54,235 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-07-21 01:48:54,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:48:54,236 INFO L225 Difference]: With dead ends: 45 [2022-07-21 01:48:54,236 INFO L226 Difference]: Without dead ends: 36 [2022-07-21 01:48:54,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 01:48:54,237 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 1 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 01:48:54,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 134 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 01:48:54,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-21 01:48:54,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2022-07-21 01:48:54,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 01:48:54,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-07-21 01:48:54,241 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 17 [2022-07-21 01:48:54,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:48:54,241 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-07-21 01:48:54,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 01:48:54,242 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-07-21 01:48:54,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-21 01:48:54,242 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:48:54,242 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:48:54,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 01:48:54,242 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:48:54,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:48:54,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1728168458, now seen corresponding path program 1 times [2022-07-21 01:48:54,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 01:48:54,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546457955] [2022-07-21 01:48:54,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:48:54,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 01:48:54,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:48:54,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 01:48:54,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:48:54,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 01:48:54,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 01:48:54,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546457955] [2022-07-21 01:48:54,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546457955] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:48:54,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:48:54,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 01:48:54,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320666397] [2022-07-21 01:48:54,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:48:54,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 01:48:54,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 01:48:54,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 01:48:54,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 01:48:54,314 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 01:48:54,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:48:54,358 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2022-07-21 01:48:54,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 01:48:54,359 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-07-21 01:48:54,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:48:54,360 INFO L225 Difference]: With dead ends: 45 [2022-07-21 01:48:54,360 INFO L226 Difference]: Without dead ends: 36 [2022-07-21 01:48:54,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 01:48:54,361 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 1 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 01:48:54,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 134 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 01:48:54,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-21 01:48:54,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2022-07-21 01:48:54,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 01:48:54,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-07-21 01:48:54,365 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 18 [2022-07-21 01:48:54,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:48:54,366 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-07-21 01:48:54,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 01:48:54,366 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-07-21 01:48:54,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-21 01:48:54,367 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:48:54,367 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:48:54,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 01:48:54,372 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:48:54,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:48:54,373 INFO L85 PathProgramCache]: Analyzing trace with hash -79286005, now seen corresponding path program 1 times [2022-07-21 01:48:54,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 01:48:54,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560451314] [2022-07-21 01:48:54,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:48:54,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 01:48:54,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 01:48:54,392 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 01:48:54,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 01:48:54,433 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 01:48:54,434 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 01:48:54,435 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-21 01:48:54,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 01:48:54,438 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-21 01:48:54,440 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-21 01:48:54,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:48:54 BoogieIcfgContainer [2022-07-21 01:48:54,464 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-21 01:48:54,465 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-21 01:48:54,465 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-21 01:48:54,465 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-21 01:48:54,465 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:48:53" (3/4) ... [2022-07-21 01:48:54,467 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-07-21 01:48:54,467 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-21 01:48:54,468 INFO L158 Benchmark]: Toolchain (without parser) took 1691.60ms. Allocated memory was 65.0MB in the beginning and 81.8MB in the end (delta: 16.8MB). Free memory was 46.4MB in the beginning and 53.1MB in the end (delta: -6.7MB). Peak memory consumption was 12.0MB. Max. memory is 16.1GB. [2022-07-21 01:48:54,468 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 65.0MB. Free memory was 47.6MB in the beginning and 47.5MB in the end (delta: 50.8kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 01:48:54,468 INFO L158 Benchmark]: CACSL2BoogieTranslator took 260.28ms. Allocated memory is still 65.0MB. Free memory was 46.1MB in the beginning and 47.7MB in the end (delta: -1.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-07-21 01:48:54,468 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.50ms. Allocated memory is still 65.0MB. Free memory was 47.5MB in the beginning and 46.0MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 01:48:54,468 INFO L158 Benchmark]: Boogie Preprocessor took 39.58ms. Allocated memory is still 65.0MB. Free memory was 46.0MB in the beginning and 44.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-21 01:48:54,468 INFO L158 Benchmark]: RCFGBuilder took 320.17ms. Allocated memory is still 65.0MB. Free memory was 44.6MB in the beginning and 32.9MB in the end (delta: 11.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-21 01:48:54,469 INFO L158 Benchmark]: TraceAbstraction took 1028.03ms. Allocated memory was 65.0MB in the beginning and 81.8MB in the end (delta: 16.8MB). Free memory was 32.3MB in the beginning and 53.1MB in the end (delta: -20.8MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 01:48:54,469 INFO L158 Benchmark]: Witness Printer took 2.23ms. Allocated memory is still 81.8MB. Free memory is still 53.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 01:48:54,470 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 65.0MB. Free memory was 47.6MB in the beginning and 47.5MB in the end (delta: 50.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 260.28ms. Allocated memory is still 65.0MB. Free memory was 46.1MB in the beginning and 47.7MB in the end (delta: -1.6MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.50ms. Allocated memory is still 65.0MB. Free memory was 47.5MB in the beginning and 46.0MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 39.58ms. Allocated memory is still 65.0MB. Free memory was 46.0MB in the beginning and 44.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 320.17ms. Allocated memory is still 65.0MB. Free memory was 44.6MB in the beginning and 32.9MB in the end (delta: 11.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 1028.03ms. Allocated memory was 65.0MB in the beginning and 81.8MB in the end (delta: 16.8MB). Free memory was 32.3MB in the beginning and 53.1MB in the end (delta: -20.8MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 2.23ms. Allocated memory is still 81.8MB. Free memory is still 53.1MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 87]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 86, overapproximation of someUnaryDOUBLEoperation at line 82. Possible FailurePath: [L81] double x = 0.0; [L82] double y = -0.0; [L83] CALL, EXPR fmax_double(x, y) [L54] CALL, EXPR __fpclassify_double(x) VAL [\old(x)=0] [L26] __uint32_t msw, lsw; VAL [\old(x)=0, x=0] [L29] ieee_double_shape_type ew_u; [L30] ew_u.value = (x) [L31] EXPR ew_u.parts.msw [L31] (msw) = ew_u.parts.msw [L32] EXPR ew_u.parts.lsw [L32] (lsw) = ew_u.parts.lsw [L35-L36] COND FALSE !((msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000)) VAL [\old(x)=0, lsw=4294967297, msw=4293918721, x=0] [L38-L39] COND FALSE !((msw >= 0x00100000 && msw <= 0x7fefffff) || (msw >= 0x80100000 && msw <= 0xffefffff)) VAL [\old(x)=0, lsw=4294967297, msw=4293918721, x=0] [L41-L42] COND FALSE !(( msw <= 0x000fffff) || (msw >= 0x80000000 && msw <= 0x800fffff)) VAL [\old(x)=0, lsw=4294967297, msw=4293918721, x=0] [L45-L46] COND FALSE !((msw == 0x7ff00000 && lsw == 0x00000000) || (msw == 0xfff00000 && lsw == 0x00000000)) [L49] return 0; VAL [\old(x)=0, \result=0, lsw=4294967297, msw=4293918721, x=0] [L54] RET, EXPR __fpclassify_double(x) VAL [\old(x)=0, \old(y)=4294967298, __fpclassify_double(x)=0, x=0, y=4294967298] [L54] COND TRUE __fpclassify_double(x) == 0 [L55] return y; VAL [\old(x)=0, \old(y)=4294967298, \result=4294967298, x=0, y=4294967298] [L83] RET, EXPR fmax_double(x, y) [L83] double res = fmax_double(x, y); [L86] EXPR res == 0.0 && __signbit_double(res) == 0 VAL [res=4294967298, res == 0.0 && __signbit_double(res) == 0=0, x=0, y=4294967298] [L86] COND TRUE !(res == 0.0 && __signbit_double(res) == 0) [L87] reach_error() VAL [res=4294967298, x=0, y=4294967298] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.9s, OverallIterations: 6, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5 mSDsluCounter, 591 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 406 mSDsCounter, 5 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 95 IncrementalHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5 mSolverCounterUnsat, 185 mSDtfsCounter, 95 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=2, InterpolantAutomatonStates: 23, 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, 12 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 98 NumberOfCodeBlocks, 98 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 75 ConstructedInterpolants, 0 QuantifiedInterpolants, 207 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 [2022-07-21 01:48:54,504 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_1252b.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 72e6a731e5f93184d8452e046ba5fa07483889ea5d4b2985d4608011d07f1d55 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 01:48:56,174 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 01:48:56,176 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 01:48:56,195 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 01:48:56,195 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 01:48:56,196 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 01:48:56,197 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 01:48:56,198 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 01:48:56,200 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 01:48:56,200 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 01:48:56,201 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 01:48:56,202 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 01:48:56,202 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 01:48:56,203 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 01:48:56,204 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 01:48:56,205 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 01:48:56,205 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 01:48:56,206 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 01:48:56,207 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 01:48:56,209 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 01:48:56,210 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 01:48:56,210 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 01:48:56,211 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 01:48:56,212 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 01:48:56,212 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 01:48:56,233 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 01:48:56,233 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 01:48:56,233 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 01:48:56,234 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 01:48:56,234 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 01:48:56,235 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 01:48:56,235 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 01:48:56,236 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 01:48:56,236 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 01:48:56,237 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 01:48:56,237 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 01:48:56,237 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 01:48:56,238 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 01:48:56,238 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 01:48:56,238 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 01:48:56,239 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 01:48:56,239 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 01:48:56,240 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-07-21 01:48:56,266 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 01:48:56,268 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 01:48:56,269 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 01:48:56,269 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 01:48:56,270 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 01:48:56,270 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 01:48:56,270 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 01:48:56,271 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 01:48:56,271 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 01:48:56,271 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 01:48:56,272 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 01:48:56,272 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 01:48:56,272 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 01:48:56,272 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 01:48:56,272 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 01:48:56,272 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 01:48:56,273 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 01:48:56,273 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-21 01:48:56,273 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-21 01:48:56,273 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 01:48:56,273 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 01:48:56,273 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 01:48:56,274 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 01:48:56,274 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 01:48:56,274 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 01:48:56,274 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 01:48:56,274 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 01:48:56,275 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 01:48:56,275 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 01:48:56,275 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 01:48:56,275 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-21 01:48:56,275 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-21 01:48:56,276 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 01:48:56,276 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 01:48:56,276 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 01:48:56,276 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-21 01:48:56,276 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 72e6a731e5f93184d8452e046ba5fa07483889ea5d4b2985d4608011d07f1d55 [2022-07-21 01:48:56,560 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 01:48:56,589 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 01:48:56,591 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 01:48:56,592 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 01:48:56,592 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 01:48:56,594 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/double_req_bl_1252b.c [2022-07-21 01:48:56,651 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd72e426b/650bbdd758d346c5bc4e86705007448b/FLAG3acddfd48 [2022-07-21 01:48:57,040 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 01:48:57,041 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/double_req_bl_1252b.c [2022-07-21 01:48:57,046 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd72e426b/650bbdd758d346c5bc4e86705007448b/FLAG3acddfd48 [2022-07-21 01:48:57,063 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd72e426b/650bbdd758d346c5bc4e86705007448b [2022-07-21 01:48:57,065 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 01:48:57,066 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 01:48:57,069 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 01:48:57,069 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 01:48:57,072 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 01:48:57,072 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:48:57" (1/1) ... [2022-07-21 01:48:57,074 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c469a0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:48:57, skipping insertion in model container [2022-07-21 01:48:57,074 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:48:57" (1/1) ... [2022-07-21 01:48:57,079 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 01:48:57,091 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 01:48:57,199 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/double_req_bl_1252b.c[2154,2167] [2022-07-21 01:48:57,202 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 01:48:57,234 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 01:48:57,256 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/double_req_bl_1252b.c[2154,2167] [2022-07-21 01:48:57,261 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 01:48:57,275 INFO L208 MainTranslator]: Completed translation [2022-07-21 01:48:57,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:48:57 WrapperNode [2022-07-21 01:48:57,276 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 01:48:57,277 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 01:48:57,277 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 01:48:57,277 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 01:48:57,281 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:48:57" (1/1) ... [2022-07-21 01:48:57,297 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:48:57" (1/1) ... [2022-07-21 01:48:57,314 INFO L137 Inliner]: procedures = 21, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 65 [2022-07-21 01:48:57,315 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 01:48:57,316 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 01:48:57,316 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 01:48:57,316 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 01:48:57,322 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:48:57" (1/1) ... [2022-07-21 01:48:57,322 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:48:57" (1/1) ... [2022-07-21 01:48:57,330 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:48:57" (1/1) ... [2022-07-21 01:48:57,330 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:48:57" (1/1) ... [2022-07-21 01:48:57,345 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:48:57" (1/1) ... [2022-07-21 01:48:57,350 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:48:57" (1/1) ... [2022-07-21 01:48:57,352 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:48:57" (1/1) ... [2022-07-21 01:48:57,357 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 01:48:57,359 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 01:48:57,361 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 01:48:57,361 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 01:48:57,361 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:48:57" (1/1) ... [2022-07-21 01:48:57,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 01:48:57,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 01:48:57,384 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 01:48:57,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 01:48:57,411 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 01:48:57,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE8 [2022-07-21 01:48:57,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-21 01:48:57,412 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 01:48:57,412 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_double [2022-07-21 01:48:57,412 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_double [2022-07-21 01:48:57,412 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-21 01:48:57,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 01:48:57,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 01:48:57,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 01:48:57,497 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 01:48:57,498 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 01:48:57,693 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 01:48:57,697 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 01:48:57,697 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-21 01:48:57,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:48:57 BoogieIcfgContainer [2022-07-21 01:48:57,699 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 01:48:57,700 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 01:48:57,700 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 01:48:57,702 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 01:48:57,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:48:57" (1/3) ... [2022-07-21 01:48:57,703 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bb456d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:48:57, skipping insertion in model container [2022-07-21 01:48:57,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:48:57" (2/3) ... [2022-07-21 01:48:57,703 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bb456d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:48:57, skipping insertion in model container [2022-07-21 01:48:57,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:48:57" (3/3) ... [2022-07-21 01:48:57,704 INFO L111 eAbstractionObserver]: Analyzing ICFG double_req_bl_1252b.c [2022-07-21 01:48:57,714 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 01:48:57,714 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 01:48:57,769 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 01:48:57,776 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4be8368c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3bbe0e06 [2022-07-21 01:48:57,776 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 01:48:57,780 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 25 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 01:48:57,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-21 01:48:57,786 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:48:57,786 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:48:57,787 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:48:57,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:48:57,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1130952206, now seen corresponding path program 1 times [2022-07-21 01:48:57,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:48:57,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [130252119] [2022-07-21 01:48:57,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:48:57,801 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:48:57,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:48:57,803 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 01:48:57,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-21 01:48:57,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:48:57,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-21 01:48:57,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 01:48:57,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 01:48:57,896 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 01:48:57,896 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 01:48:57,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [130252119] [2022-07-21 01:48:57,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [130252119] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:48:57,898 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:48:57,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 01:48:57,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576821066] [2022-07-21 01:48:57,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:48:57,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 01:48:57,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 01:48:57,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 01:48:57,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 01:48:57,925 INFO L87 Difference]: Start difference. First operand has 29 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 25 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 01:48:57,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:48:57,937 INFO L93 Difference]: Finished difference Result 55 states and 82 transitions. [2022-07-21 01:48:57,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 01:48:57,938 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-07-21 01:48:57,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:48:57,942 INFO L225 Difference]: With dead ends: 55 [2022-07-21 01:48:57,951 INFO L226 Difference]: Without dead ends: 26 [2022-07-21 01:48:57,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 01:48:57,955 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 01:48:57,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 01:48:57,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-07-21 01:48:57,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-07-21 01:48:57,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 01:48:57,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2022-07-21 01:48:57,985 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 13 [2022-07-21 01:48:57,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:48:57,985 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2022-07-21 01:48:57,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 01:48:57,985 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2022-07-21 01:48:57,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-21 01:48:57,987 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:48:57,987 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:48:57,995 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-07-21 01:48:58,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 01:48:58,195 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:48:58,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:48:58,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1285201507, now seen corresponding path program 1 times [2022-07-21 01:48:58,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:48:58,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1259136355] [2022-07-21 01:48:58,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:48:58,196 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:48:58,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:48:58,198 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 01:48:58,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-21 01:48:58,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:48:58,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 01:48:58,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 01:48:58,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 01:48:58,267 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 01:48:58,267 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 01:48:58,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1259136355] [2022-07-21 01:48:58,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1259136355] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:48:58,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:48:58,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 01:48:58,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170416315] [2022-07-21 01:48:58,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:48:58,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 01:48:58,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 01:48:58,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 01:48:58,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 01:48:58,269 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 01:48:58,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:48:58,288 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2022-07-21 01:48:58,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 01:48:58,288 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-07-21 01:48:58,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:48:58,290 INFO L225 Difference]: With dead ends: 38 [2022-07-21 01:48:58,290 INFO L226 Difference]: Without dead ends: 29 [2022-07-21 01:48:58,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 01:48:58,291 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 0 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 01:48:58,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 90 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 01:48:58,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-21 01:48:58,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-07-21 01:48:58,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 01:48:58,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions. [2022-07-21 01:48:58,296 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 14 [2022-07-21 01:48:58,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:48:58,296 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions. [2022-07-21 01:48:58,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 01:48:58,297 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions. [2022-07-21 01:48:58,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-21 01:48:58,297 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:48:58,297 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:48:58,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-21 01:48:58,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 01:48:58,505 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:48:58,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:48:58,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1497908235, now seen corresponding path program 1 times [2022-07-21 01:48:58,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:48:58,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1675643544] [2022-07-21 01:48:58,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:48:58,506 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:48:58,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:48:58,508 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 01:48:58,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-21 01:48:58,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:48:58,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 01:48:58,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 01:48:58,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 01:48:58,772 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 01:48:58,772 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 01:48:58,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1675643544] [2022-07-21 01:48:58,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1675643544] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:48:58,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:48:58,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 01:48:58,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971724691] [2022-07-21 01:48:58,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:48:58,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 01:48:58,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 01:48:58,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 01:48:58,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 01:48:58,774 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 01:48:58,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:48:58,885 INFO L93 Difference]: Finished difference Result 56 states and 73 transitions. [2022-07-21 01:48:58,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 01:48:58,886 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-07-21 01:48:58,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:48:58,887 INFO L225 Difference]: With dead ends: 56 [2022-07-21 01:48:58,887 INFO L226 Difference]: Without dead ends: 31 [2022-07-21 01:48:58,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 01:48:58,888 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 18 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 01:48:58,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 102 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 25 Unchecked, 0.1s Time] [2022-07-21 01:48:58,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-21 01:48:58,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-07-21 01:48:58,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.32) internal successors, (33), 26 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 01:48:58,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2022-07-21 01:48:58,893 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 15 [2022-07-21 01:48:58,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:48:58,893 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2022-07-21 01:48:58,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 01:48:58,894 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2022-07-21 01:48:58,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-21 01:48:58,894 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:48:58,894 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:48:58,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-21 01:48:59,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 01:48:59,104 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:48:59,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:48:59,105 INFO L85 PathProgramCache]: Analyzing trace with hash -2116811041, now seen corresponding path program 1 times [2022-07-21 01:48:59,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:48:59,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [170230052] [2022-07-21 01:48:59,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:48:59,106 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:48:59,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:48:59,108 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 01:48:59,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-21 01:48:59,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:48:59,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 01:48:59,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 01:48:59,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 01:48:59,182 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 01:48:59,182 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 01:48:59,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [170230052] [2022-07-21 01:48:59,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [170230052] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:48:59,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:48:59,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 01:48:59,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872433301] [2022-07-21 01:48:59,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:48:59,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 01:48:59,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 01:48:59,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 01:48:59,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 01:48:59,184 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 01:48:59,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:48:59,764 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2022-07-21 01:48:59,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 01:48:59,765 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-07-21 01:48:59,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:48:59,766 INFO L225 Difference]: With dead ends: 43 [2022-07-21 01:48:59,766 INFO L226 Difference]: Without dead ends: 34 [2022-07-21 01:48:59,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 01:48:59,767 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-21 01:48:59,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 99 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-21 01:48:59,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-07-21 01:48:59,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2022-07-21 01:48:59,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.32) internal successors, (33), 26 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 01:48:59,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2022-07-21 01:48:59,774 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 16 [2022-07-21 01:48:59,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:48:59,774 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2022-07-21 01:48:59,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 01:48:59,775 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2022-07-21 01:48:59,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-21 01:48:59,775 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:48:59,775 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:48:59,783 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2022-07-21 01:48:59,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 01:48:59,976 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:48:59,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:48:59,977 INFO L85 PathProgramCache]: Analyzing trace with hash 172315143, now seen corresponding path program 1 times [2022-07-21 01:48:59,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:48:59,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1764851500] [2022-07-21 01:48:59,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:48:59,978 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:48:59,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:48:59,979 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 01:48:59,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-21 01:49:00,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:49:00,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 01:49:00,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 01:49:00,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 01:49:00,142 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 01:49:00,142 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 01:49:00,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1764851500] [2022-07-21 01:49:00,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1764851500] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:49:00,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:49:00,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 01:49:00,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013167373] [2022-07-21 01:49:00,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:49:00,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 01:49:00,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 01:49:00,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 01:49:00,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 01:49:00,144 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 01:49:00,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:49:00,197 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2022-07-21 01:49:00,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 01:49:00,201 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-07-21 01:49:00,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:49:00,202 INFO L225 Difference]: With dead ends: 57 [2022-07-21 01:49:00,202 INFO L226 Difference]: Without dead ends: 30 [2022-07-21 01:49:00,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 01:49:00,203 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 18 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 01:49:00,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 88 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 25 Unchecked, 0.0s Time] [2022-07-21 01:49:00,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-21 01:49:00,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2022-07-21 01:49:00,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 01:49:00,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2022-07-21 01:49:00,206 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 17 [2022-07-21 01:49:00,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:49:00,206 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2022-07-21 01:49:00,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-21 01:49:00,207 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2022-07-21 01:49:00,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-21 01:49:00,207 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:49:00,207 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:49:00,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-21 01:49:00,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 01:49:00,408 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:49:00,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:49:00,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1943218574, now seen corresponding path program 1 times [2022-07-21 01:49:00,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:49:00,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [819805073] [2022-07-21 01:49:00,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:49:00,409 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:49:00,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:49:00,410 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 01:49:00,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-21 01:49:00,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:49:00,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 01:49:00,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 01:49:00,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 01:49:00,488 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 01:49:00,489 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 01:49:00,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [819805073] [2022-07-21 01:49:00,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [819805073] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:49:00,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:49:00,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 01:49:00,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320233261] [2022-07-21 01:49:00,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:49:00,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 01:49:00,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 01:49:00,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 01:49:00,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 01:49:00,491 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 01:49:00,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:49:00,584 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2022-07-21 01:49:00,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 01:49:00,585 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2022-07-21 01:49:00,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:49:00,586 INFO L225 Difference]: With dead ends: 40 [2022-07-21 01:49:00,586 INFO L226 Difference]: Without dead ends: 31 [2022-07-21 01:49:00,586 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 01:49:00,587 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 01:49:00,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 87 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 01:49:00,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-21 01:49:00,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-07-21 01:49:00,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.28) internal successors, (32), 26 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 01:49:00,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2022-07-21 01:49:00,591 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 22 [2022-07-21 01:49:00,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:49:00,591 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2022-07-21 01:49:00,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 01:49:00,591 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2022-07-21 01:49:00,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-21 01:49:00,592 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:49:00,592 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:49:00,612 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-07-21 01:49:00,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 01:49:00,800 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:49:00,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:49:00,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1682849308, now seen corresponding path program 1 times [2022-07-21 01:49:00,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:49:00,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1008711611] [2022-07-21 01:49:00,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:49:00,801 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:49:00,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:49:00,802 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 01:49:00,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-21 01:49:00,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:49:00,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 01:49:00,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 01:49:01,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 01:49:01,029 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 01:49:01,029 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 01:49:01,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1008711611] [2022-07-21 01:49:01,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1008711611] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:49:01,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:49:01,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 01:49:01,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67771838] [2022-07-21 01:49:01,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:49:01,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 01:49:01,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 01:49:01,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 01:49:01,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 01:49:01,032 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 01:49:01,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:49:01,129 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2022-07-21 01:49:01,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 01:49:01,134 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2022-07-21 01:49:01,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:49:01,134 INFO L225 Difference]: With dead ends: 45 [2022-07-21 01:49:01,134 INFO L226 Difference]: Without dead ends: 31 [2022-07-21 01:49:01,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 01:49:01,135 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 16 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 01:49:01,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 102 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 19 Unchecked, 0.1s Time] [2022-07-21 01:49:01,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-21 01:49:01,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-07-21 01:49:01,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.24) internal successors, (31), 26 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 01:49:01,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2022-07-21 01:49:01,138 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 23 [2022-07-21 01:49:01,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:49:01,139 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2022-07-21 01:49:01,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 01:49:01,139 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2022-07-21 01:49:01,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-21 01:49:01,142 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:49:01,143 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:49:01,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-21 01:49:01,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 01:49:01,348 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:49:01,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:49:01,348 INFO L85 PathProgramCache]: Analyzing trace with hash 474937390, now seen corresponding path program 1 times [2022-07-21 01:49:01,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:49:01,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1064502363] [2022-07-21 01:49:01,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:49:01,348 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:49:01,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:49:01,349 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 01:49:01,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-21 01:49:01,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:49:01,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 01:49:01,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 01:49:01,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 01:49:01,410 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 01:49:01,410 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 01:49:01,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1064502363] [2022-07-21 01:49:01,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1064502363] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:49:01,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:49:01,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 01:49:01,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887126962] [2022-07-21 01:49:01,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:49:01,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 01:49:01,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 01:49:01,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 01:49:01,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 01:49:01,411 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 01:49:01,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:49:01,461 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2022-07-21 01:49:01,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 01:49:01,461 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-07-21 01:49:01,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:49:01,462 INFO L225 Difference]: With dead ends: 41 [2022-07-21 01:49:01,462 INFO L226 Difference]: Without dead ends: 32 [2022-07-21 01:49:01,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 01:49:01,462 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 0 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 01:49:01,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 94 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 01:49:01,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-21 01:49:01,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2022-07-21 01:49:01,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 01:49:01,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2022-07-21 01:49:01,466 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 24 [2022-07-21 01:49:01,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:49:01,466 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2022-07-21 01:49:01,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 01:49:01,466 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-07-21 01:49:01,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-21 01:49:01,466 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:49:01,466 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:49:01,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-21 01:49:01,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 01:49:01,674 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:49:01,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:49:01,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1777787178, now seen corresponding path program 1 times [2022-07-21 01:49:01,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:49:01,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1783289002] [2022-07-21 01:49:01,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:49:01,675 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:49:01,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:49:01,676 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 01:49:01,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-21 01:49:01,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:49:01,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-21 01:49:01,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 01:49:01,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 01:49:01,781 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 01:49:01,781 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 01:49:01,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1783289002] [2022-07-21 01:49:01,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1783289002] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:49:01,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:49:01,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 01:49:01,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209612743] [2022-07-21 01:49:01,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:49:01,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 01:49:01,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 01:49:01,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 01:49:01,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 01:49:01,782 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 01:49:01,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:49:01,889 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2022-07-21 01:49:01,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 01:49:01,889 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-07-21 01:49:01,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:49:01,890 INFO L225 Difference]: With dead ends: 42 [2022-07-21 01:49:01,890 INFO L226 Difference]: Without dead ends: 39 [2022-07-21 01:49:01,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-07-21 01:49:01,890 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 34 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 01:49:01,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 114 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 01:49:01,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-07-21 01:49:01,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2022-07-21 01:49:01,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 01:49:01,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2022-07-21 01:49:01,894 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 24 [2022-07-21 01:49:01,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:49:01,894 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2022-07-21 01:49:01,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 01:49:01,894 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2022-07-21 01:49:01,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-21 01:49:01,894 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:49:01,895 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:49:01,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-21 01:49:02,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 01:49:02,103 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:49:02,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:49:02,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1835045480, now seen corresponding path program 1 times [2022-07-21 01:49:02,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:49:02,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [846875838] [2022-07-21 01:49:02,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:49:02,104 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:49:02,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:49:02,105 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 01:49:02,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-21 01:49:02,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:49:02,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-21 01:49:02,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 01:49:02,189 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 01:49:02,189 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 01:49:02,189 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 01:49:02,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [846875838] [2022-07-21 01:49:02,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [846875838] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:49:02,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:49:02,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 01:49:02,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080913199] [2022-07-21 01:49:02,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:49:02,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 01:49:02,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 01:49:02,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 01:49:02,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 01:49:02,190 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 01:49:02,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:49:02,199 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2022-07-21 01:49:02,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 01:49:02,200 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-07-21 01:49:02,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:49:02,200 INFO L225 Difference]: With dead ends: 41 [2022-07-21 01:49:02,200 INFO L226 Difference]: Without dead ends: 31 [2022-07-21 01:49:02,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 01:49:02,201 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 12 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 01:49:02,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 41 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 01:49:02,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-21 01:49:02,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-07-21 01:49:02,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 01:49:02,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-07-21 01:49:02,204 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 24 [2022-07-21 01:49:02,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:49:02,204 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-07-21 01:49:02,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 01:49:02,204 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-07-21 01:49:02,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-21 01:49:02,205 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:49:02,205 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:49:02,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-21 01:49:02,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 01:49:02,413 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:49:02,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:49:02,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1323122336, now seen corresponding path program 1 times [2022-07-21 01:49:02,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:49:02,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [588297433] [2022-07-21 01:49:02,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:49:02,414 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:49:02,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:49:02,415 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 01:49:02,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-21 01:49:02,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:49:02,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 01:49:02,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 01:49:02,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-21 01:49:02,597 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 01:49:02,597 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 01:49:02,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [588297433] [2022-07-21 01:49:02,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [588297433] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:49:02,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:49:02,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 01:49:02,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576560166] [2022-07-21 01:49:02,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:49:02,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 01:49:02,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 01:49:02,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 01:49:02,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 01:49:02,599 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 01:49:02,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:49:02,690 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-07-21 01:49:02,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 01:49:02,691 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2022-07-21 01:49:02,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:49:02,692 INFO L225 Difference]: With dead ends: 42 [2022-07-21 01:49:02,692 INFO L226 Difference]: Without dead ends: 25 [2022-07-21 01:49:02,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-21 01:49:02,692 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 14 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 01:49:02,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 84 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 16 Unchecked, 0.1s Time] [2022-07-21 01:49:02,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-21 01:49:02,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-07-21 01:49:02,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-21 01:49:02,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2022-07-21 01:49:02,695 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 25 [2022-07-21 01:49:02,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:49:02,695 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2022-07-21 01:49:02,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-21 01:49:02,696 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2022-07-21 01:49:02,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-21 01:49:02,696 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:49:02,696 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:49:02,712 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-07-21 01:49:02,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 01:49:02,904 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:49:02,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:49:02,905 INFO L85 PathProgramCache]: Analyzing trace with hash 2065734315, now seen corresponding path program 1 times [2022-07-21 01:49:02,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:49:02,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1515199942] [2022-07-21 01:49:02,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:49:02,905 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:49:02,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:49:02,906 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 01:49:02,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-21 01:49:02,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 01:49:02,986 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 01:49:03,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 01:49:03,053 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2022-07-21 01:49:03,053 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 01:49:03,054 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-21 01:49:03,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-21 01:49:03,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 01:49:03,258 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:49:03,260 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-21 01:49:03,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:49:03 BoogieIcfgContainer [2022-07-21 01:49:03,282 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-21 01:49:03,283 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-21 01:49:03,283 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-21 01:49:03,283 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-21 01:49:03,283 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:48:57" (3/4) ... [2022-07-21 01:49:03,284 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-07-21 01:49:03,311 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-21 01:49:03,311 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-21 01:49:03,312 INFO L158 Benchmark]: Toolchain (without parser) took 6245.68ms. Allocated memory was 52.4MB in the beginning and 79.7MB in the end (delta: 27.3MB). Free memory was 30.2MB in the beginning and 51.8MB in the end (delta: -21.6MB). Peak memory consumption was 3.9MB. Max. memory is 16.1GB. [2022-07-21 01:49:03,312 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 52.4MB. Free memory was 34.5MB in the beginning and 34.4MB in the end (delta: 37.5kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 01:49:03,312 INFO L158 Benchmark]: CACSL2BoogieTranslator took 207.09ms. Allocated memory was 52.4MB in the beginning and 65.0MB in the end (delta: 12.6MB). Free memory was 30.0MB in the beginning and 47.8MB in the end (delta: -17.8MB). Peak memory consumption was 7.4MB. Max. memory is 16.1GB. [2022-07-21 01:49:03,312 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.29ms. Allocated memory is still 65.0MB. Free memory was 47.8MB in the beginning and 46.1MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-21 01:49:03,313 INFO L158 Benchmark]: Boogie Preprocessor took 43.00ms. Allocated memory is still 65.0MB. Free memory was 46.1MB in the beginning and 44.6MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 01:49:03,313 INFO L158 Benchmark]: RCFGBuilder took 339.55ms. Allocated memory is still 65.0MB. Free memory was 44.6MB in the beginning and 47.7MB in the end (delta: -3.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-07-21 01:49:03,313 INFO L158 Benchmark]: TraceAbstraction took 5582.66ms. Allocated memory was 65.0MB in the beginning and 79.7MB in the end (delta: 14.7MB). Free memory was 47.0MB in the beginning and 54.1MB in the end (delta: -7.1MB). Peak memory consumption was 7.5MB. Max. memory is 16.1GB. [2022-07-21 01:49:03,313 INFO L158 Benchmark]: Witness Printer took 28.68ms. Allocated memory is still 79.7MB. Free memory was 54.1MB in the beginning and 51.8MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-21 01:49:03,314 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 52.4MB. Free memory was 34.5MB in the beginning and 34.4MB in the end (delta: 37.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 207.09ms. Allocated memory was 52.4MB in the beginning and 65.0MB in the end (delta: 12.6MB). Free memory was 30.0MB in the beginning and 47.8MB in the end (delta: -17.8MB). Peak memory consumption was 7.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.29ms. Allocated memory is still 65.0MB. Free memory was 47.8MB in the beginning and 46.1MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 43.00ms. Allocated memory is still 65.0MB. Free memory was 46.1MB in the beginning and 44.6MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 339.55ms. Allocated memory is still 65.0MB. Free memory was 44.6MB in the beginning and 47.7MB in the end (delta: -3.0MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 5582.66ms. Allocated memory was 65.0MB in the beginning and 79.7MB in the end (delta: 14.7MB). Free memory was 47.0MB in the beginning and 54.1MB in the end (delta: -7.1MB). Peak memory consumption was 7.5MB. Max. memory is 16.1GB. * Witness Printer took 28.68ms. Allocated memory is still 79.7MB. Free memory was 54.1MB in the beginning and 51.8MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 87]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L81] double x = 0.0; [L82] double y = -0.0; [L83] CALL, EXPR fmax_double(x, y) [L54] CALL, EXPR __fpclassify_double(x) VAL [\old(x)=0.0] [L26] __uint32_t msw, lsw; VAL [\old(x)=0.0, x=0.0] [L29] ieee_double_shape_type ew_u; [L30] ew_u.value = (x) [L31] EXPR ew_u.parts.msw [L31] (msw) = ew_u.parts.msw [L32] EXPR ew_u.parts.lsw [L32] (lsw) = ew_u.parts.lsw [L35-L36] COND TRUE (msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000) [L37] return 2; VAL [\old(x)=0.0, \result=2, lsw=0, msw=0, x=0.0] [L54] RET, EXPR __fpclassify_double(x) VAL [\old(x)=0.0, \old(y)=0.0, __fpclassify_double(x)=2, x=0.0, y=0.0] [L54] COND FALSE !(__fpclassify_double(x) == 0) [L56] CALL, EXPR __fpclassify_double(y) VAL [\old(x)=0.0] [L26] __uint32_t msw, lsw; VAL [\old(x)=0.0, x=0.0] [L29] ieee_double_shape_type ew_u; [L30] ew_u.value = (x) [L31] EXPR ew_u.parts.msw [L31] (msw) = ew_u.parts.msw [L32] EXPR ew_u.parts.lsw [L32] (lsw) = ew_u.parts.lsw [L35-L36] COND TRUE (msw == 0x00000000 && lsw == 0x00000000) || (msw == 0x80000000 && lsw == 0x00000000) [L37] return 2; VAL [\old(x)=0.0, \result=2, lsw=0, msw=-2147483648, x=0.0] [L56] RET, EXPR __fpclassify_double(y) VAL [\old(x)=0.0, \old(y)=0.0, __fpclassify_double(y)=2, x=0.0, y=0.0] [L56] COND FALSE !(__fpclassify_double(y) == 0) [L59] EXPR x > y ? x : y VAL [\old(x)=0.0, \old(y)=0.0, x=0.0, x > y ? x : y=0.0, y=0.0] [L59] return x > y ? x : y; [L83] RET, EXPR fmax_double(x, y) [L83] double res = fmax_double(x, y); [L86] EXPR res == 0.0 && __signbit_double(res) == 0 [L86] CALL, EXPR __signbit_double(res) [L63] __uint32_t msw; VAL [\old(x)=0.0, x=0.0] [L66] ieee_double_shape_type gh_u; [L67] gh_u.value = (x) [L68] EXPR gh_u.parts.msw [L68] (msw) = gh_u.parts.msw [L71] return (msw & 0x80000000) != 0; VAL [\old(x)=0.0, \result=1, msw=2147483648, x=0.0] [L86] RET, EXPR __signbit_double(res) [L86] EXPR res == 0.0 && __signbit_double(res) == 0 VAL [__signbit_double(res)=1, res=0.0, res == 0.0 && __signbit_double(res) == 0=0, x=0.0, y=0.0] [L86] COND TRUE !(res == 0.0 && __signbit_double(res) == 0) [L87] reach_error() VAL [res=0.0, x=0.0, y=0.0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 5.5s, OverallIterations: 12, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 118 SdHoareTripleChecker+Valid, 1.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 112 mSDsluCounter, 938 SdHoareTripleChecker+Invalid, 1.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 85 IncrementalHoareTripleChecker+Unchecked, 605 mSDsCounter, 3 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 116 IncrementalHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3 mSolverCounterUnsat, 333 mSDtfsCounter, 116 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 214 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=9, InterpolantAutomatonStates: 56, 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, 11 MinimizatonAttempts, 15 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 245 NumberOfCodeBlocks, 245 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 206 ConstructedInterpolants, 24 QuantifiedInterpolants, 736 SizeOfPredicates, 35 NumberOfNonLiveVariables, 787 ConjunctsInSsa, 72 ConjunctsInUnsatCore, 11 InterpolantComputations, 11 PerfectInterpolantSequences, 36/36 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-07-21 01:49:03,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE