./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-newlib/float_req_bl_1251.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/float_req_bl_1251.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 de540e539c3db6027c1fdb04fcc6cae02aafb8aa58950d31054b2b0b8391af6d --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 01:57:47,733 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 01:57:47,735 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 01:57:47,769 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 01:57:47,769 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 01:57:47,771 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 01:57:47,774 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 01:57:47,776 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 01:57:47,778 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 01:57:47,782 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 01:57:47,783 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 01:57:47,786 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 01:57:47,787 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 01:57:47,789 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 01:57:47,790 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 01:57:47,793 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 01:57:47,794 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 01:57:47,795 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 01:57:47,797 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 01:57:47,802 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 01:57:47,803 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 01:57:47,804 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 01:57:47,805 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 01:57:47,806 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 01:57:47,813 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 01:57:47,819 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 01:57:47,819 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 01:57:47,819 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 01:57:47,820 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 01:57:47,820 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 01:57:47,821 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 01:57:47,821 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 01:57:47,823 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 01:57:47,823 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 01:57:47,824 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 01:57:47,825 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 01:57:47,825 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 01:57:47,826 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 01:57:47,826 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 01:57:47,826 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 01:57:47,827 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 01:57:47,828 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 01:57:47,835 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 01:57:47,856 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 01:57:47,857 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 01:57:47,857 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 01:57:47,857 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 01:57:47,858 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 01:57:47,858 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 01:57:47,859 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 01:57:47,859 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 01:57:47,859 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 01:57:47,860 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 01:57:47,860 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 01:57:47,860 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 01:57:47,860 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 01:57:47,860 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 01:57:47,860 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 01:57:47,861 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 01:57:47,861 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 01:57:47,861 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 01:57:47,861 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 01:57:47,861 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 01:57:47,861 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 01:57:47,862 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 01:57:47,862 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 01:57:47,862 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 01:57:47,862 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 01:57:47,862 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 01:57:47,862 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 01:57:47,862 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 01:57:47,863 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 01:57:47,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 01:57:47,863 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 01:57:47,863 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 01:57:47,863 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 01:57:47,863 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de540e539c3db6027c1fdb04fcc6cae02aafb8aa58950d31054b2b0b8391af6d [2022-07-21 01:57:48,269 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 01:57:48,294 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 01:57:48,296 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 01:57:48,297 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 01:57:48,298 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 01:57:48,299 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/float_req_bl_1251.c [2022-07-21 01:57:48,345 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8a3bfd0c/740b8287ab174b948de55410a04697ea/FLAGe146a6810 [2022-07-21 01:57:48,692 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 01:57:48,693 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/float_req_bl_1251.c [2022-07-21 01:57:48,697 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8a3bfd0c/740b8287ab174b948de55410a04697ea/FLAGe146a6810 [2022-07-21 01:57:49,095 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8a3bfd0c/740b8287ab174b948de55410a04697ea [2022-07-21 01:57:49,097 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 01:57:49,098 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 01:57:49,100 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 01:57:49,100 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 01:57:49,102 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 01:57:49,102 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:57:49" (1/1) ... [2022-07-21 01:57:49,104 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@738aafe0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:57:49, skipping insertion in model container [2022-07-21 01:57:49,104 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:57:49" (1/1) ... [2022-07-21 01:57:49,109 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 01:57:49,119 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 01:57:49,215 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/float_req_bl_1251.c[1980,1993] [2022-07-21 01:57:49,217 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/float_req_bl_1251.c[2139,2152] [2022-07-21 01:57:49,217 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 01:57:49,222 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 01:57:49,267 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/float_req_bl_1251.c[1980,1993] [2022-07-21 01:57:49,276 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/float_req_bl_1251.c[2139,2152] [2022-07-21 01:57:49,277 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 01:57:49,289 INFO L208 MainTranslator]: Completed translation [2022-07-21 01:57:49,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:57:49 WrapperNode [2022-07-21 01:57:49,303 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 01:57:49,304 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 01:57:49,305 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 01:57:49,305 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 01:57:49,309 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:57:49" (1/1) ... [2022-07-21 01:57:49,322 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:57:49" (1/1) ... [2022-07-21 01:57:49,342 INFO L137 Inliner]: procedures = 18, calls = 22, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 107 [2022-07-21 01:57:49,343 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 01:57:49,344 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 01:57:49,344 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 01:57:49,344 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 01:57:49,350 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:57:49" (1/1) ... [2022-07-21 01:57:49,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:57:49" (1/1) ... [2022-07-21 01:57:49,360 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:57:49" (1/1) ... [2022-07-21 01:57:49,361 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:57:49" (1/1) ... [2022-07-21 01:57:49,372 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:57:49" (1/1) ... [2022-07-21 01:57:49,378 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:57:49" (1/1) ... [2022-07-21 01:57:49,380 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:57:49" (1/1) ... [2022-07-21 01:57:49,385 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 01:57:49,387 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 01:57:49,387 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 01:57:49,387 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 01:57:49,389 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:57:49" (1/1) ... [2022-07-21 01:57:49,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 01:57:49,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 01:57:49,437 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 01:57:49,468 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 01:57:49,481 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 01:57:49,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 01:57:49,482 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 01:57:49,482 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2022-07-21 01:57:49,482 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2022-07-21 01:57:49,482 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2022-07-21 01:57:49,482 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2022-07-21 01:57:49,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2022-07-21 01:57:49,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 01:57:49,483 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 01:57:49,483 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-21 01:57:49,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 01:57:49,554 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 01:57:49,555 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 01:57:49,789 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 01:57:49,793 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 01:57:49,807 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-21 01:57:49,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:57:49 BoogieIcfgContainer [2022-07-21 01:57:49,809 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 01:57:49,810 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 01:57:49,811 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 01:57:49,813 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 01:57:49,813 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:57:49" (1/3) ... [2022-07-21 01:57:49,814 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6607601 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:57:49, skipping insertion in model container [2022-07-21 01:57:49,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:57:49" (2/3) ... [2022-07-21 01:57:49,814 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6607601 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:57:49, skipping insertion in model container [2022-07-21 01:57:49,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:57:49" (3/3) ... [2022-07-21 01:57:49,815 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1251.c [2022-07-21 01:57:49,826 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 01:57:49,843 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-21 01:57:49,892 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 01:57:49,908 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@14ff4cb1, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@55134594 [2022-07-21 01:57:49,908 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 01:57:49,920 INFO L276 IsEmpty]: Start isEmpty. Operand has 57 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 44 states have internal predecessors, (61), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-21 01:57:49,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-21 01:57:49,927 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:57:49,928 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:57:49,928 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:57:49,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:57:49,936 INFO L85 PathProgramCache]: Analyzing trace with hash -625969503, now seen corresponding path program 1 times [2022-07-21 01:57:49,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 01:57:49,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084245540] [2022-07-21 01:57:49,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:57:49,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 01:57:50,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:57:50,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 01:57:50,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:57:50,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-21 01:57:50,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:57:50,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-07-21 01:57:50,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:57:50,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 01:57:50,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 01:57:50,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084245540] [2022-07-21 01:57:50,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084245540] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:57:50,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:57:50,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 01:57:50,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406771458] [2022-07-21 01:57:50,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:57:50,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 01:57:50,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 01:57:50,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 01:57:50,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 01:57:50,173 INFO L87 Difference]: Start difference. First operand has 57 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 44 states have internal predecessors, (61), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 01:57:50,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:57:50,278 INFO L93 Difference]: Finished difference Result 108 states and 156 transitions. [2022-07-21 01:57:50,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 01:57:50,283 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2022-07-21 01:57:50,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:57:50,288 INFO L225 Difference]: With dead ends: 108 [2022-07-21 01:57:50,288 INFO L226 Difference]: Without dead ends: 62 [2022-07-21 01:57:50,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-21 01:57:50,292 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 19 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 01:57:50,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 245 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 01:57:50,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-21 01:57:50,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2022-07-21 01:57:50,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 42 states have internal predecessors, (54), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-21 01:57:50,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 74 transitions. [2022-07-21 01:57:50,322 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 74 transitions. Word has length 28 [2022-07-21 01:57:50,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:57:50,322 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 74 transitions. [2022-07-21 01:57:50,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 01:57:50,323 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 74 transitions. [2022-07-21 01:57:50,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-21 01:57:50,324 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:57:50,325 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:57:50,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 01:57:50,325 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:57:50,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:57:50,326 INFO L85 PathProgramCache]: Analyzing trace with hash 716059, now seen corresponding path program 1 times [2022-07-21 01:57:50,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 01:57:50,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455539395] [2022-07-21 01:57:50,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:57:50,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 01:57:50,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:57:50,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 01:57:50,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:57:50,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 01:57:50,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:57:50,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-21 01:57:50,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:57:50,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-21 01:57:50,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:57:50,455 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 01:57:50,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 01:57:50,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455539395] [2022-07-21 01:57:50,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455539395] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:57:50,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:57:50,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 01:57:50,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786765536] [2022-07-21 01:57:50,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:57:50,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 01:57:50,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 01:57:50,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 01:57:50,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 01:57:50,458 INFO L87 Difference]: Start difference. First operand 55 states and 74 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 01:57:50,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:57:50,547 INFO L93 Difference]: Finished difference Result 79 states and 104 transitions. [2022-07-21 01:57:50,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 01:57:50,548 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2022-07-21 01:57:50,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:57:50,550 INFO L225 Difference]: With dead ends: 79 [2022-07-21 01:57:50,551 INFO L226 Difference]: Without dead ends: 59 [2022-07-21 01:57:50,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 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 01:57:50,554 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 3 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 01:57:50,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 225 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 01:57:50,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-21 01:57:50,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-07-21 01:57:50,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 45 states have internal predecessors, (57), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2022-07-21 01:57:50,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 79 transitions. [2022-07-21 01:57:50,566 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 79 transitions. Word has length 34 [2022-07-21 01:57:50,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:57:50,567 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 79 transitions. [2022-07-21 01:57:50,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 01:57:50,567 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 79 transitions. [2022-07-21 01:57:50,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-21 01:57:50,569 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:57:50,569 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:57:50,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 01:57:50,569 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:57:50,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:57:50,570 INFO L85 PathProgramCache]: Analyzing trace with hash 840977401, now seen corresponding path program 1 times [2022-07-21 01:57:50,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 01:57:50,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789306887] [2022-07-21 01:57:50,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:57:50,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 01:57:50,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:57:50,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 01:57:50,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:57:50,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 01:57:50,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:57:50,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-21 01:57:50,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:57:50,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-21 01:57:50,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:57:50,713 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 01:57:50,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 01:57:50,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789306887] [2022-07-21 01:57:50,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789306887] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:57:50,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:57:50,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 01:57:50,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336720055] [2022-07-21 01:57:50,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:57:50,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 01:57:50,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 01:57:50,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 01:57:50,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 01:57:50,716 INFO L87 Difference]: Start difference. First operand 59 states and 79 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 01:57:50,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:57:50,779 INFO L93 Difference]: Finished difference Result 83 states and 109 transitions. [2022-07-21 01:57:50,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 01:57:50,780 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2022-07-21 01:57:50,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:57:50,782 INFO L225 Difference]: With dead ends: 83 [2022-07-21 01:57:50,783 INFO L226 Difference]: Without dead ends: 63 [2022-07-21 01:57:50,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 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 01:57:50,788 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 3 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 01:57:50,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 241 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 01:57:50,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-07-21 01:57:50,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2022-07-21 01:57:50,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 45 states have internal predecessors, (57), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2022-07-21 01:57:50,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 79 transitions. [2022-07-21 01:57:50,799 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 79 transitions. Word has length 35 [2022-07-21 01:57:50,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:57:50,800 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 79 transitions. [2022-07-21 01:57:50,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 01:57:50,800 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 79 transitions. [2022-07-21 01:57:50,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-21 01:57:50,803 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:57:50,804 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:57:50,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 01:57:50,804 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:57:50,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:57:50,805 INFO L85 PathProgramCache]: Analyzing trace with hash -902959273, now seen corresponding path program 1 times [2022-07-21 01:57:50,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 01:57:50,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988629111] [2022-07-21 01:57:50,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:57:50,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 01:57:50,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:57:50,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 01:57:50,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:57:50,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 01:57:50,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:57:50,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-21 01:57:50,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:57:50,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-21 01:57:50,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:57:50,896 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 01:57:50,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 01:57:50,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988629111] [2022-07-21 01:57:50,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988629111] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:57:50,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:57:50,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 01:57:50,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760719152] [2022-07-21 01:57:50,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:57:50,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 01:57:50,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 01:57:50,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 01:57:50,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 01:57:50,898 INFO L87 Difference]: Start difference. First operand 59 states and 79 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 01:57:50,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:57:50,967 INFO L93 Difference]: Finished difference Result 83 states and 109 transitions. [2022-07-21 01:57:50,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 01:57:50,967 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2022-07-21 01:57:50,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:57:50,970 INFO L225 Difference]: With dead ends: 83 [2022-07-21 01:57:50,970 INFO L226 Difference]: Without dead ends: 63 [2022-07-21 01:57:50,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 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 01:57:50,975 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 3 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 01:57:50,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 241 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 01:57:50,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-07-21 01:57:50,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2022-07-21 01:57:50,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 45 states have internal predecessors, (57), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2022-07-21 01:57:50,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 79 transitions. [2022-07-21 01:57:50,981 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 79 transitions. Word has length 36 [2022-07-21 01:57:50,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:57:50,981 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 79 transitions. [2022-07-21 01:57:50,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 01:57:50,981 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 79 transitions. [2022-07-21 01:57:50,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-21 01:57:50,982 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:57:50,982 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:57:50,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 01:57:50,982 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:57:50,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:57:50,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1658214444, now seen corresponding path program 1 times [2022-07-21 01:57:50,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 01:57:50,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121975514] [2022-07-21 01:57:50,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:57:50,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 01:57:51,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:57:51,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-21 01:57:51,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:57:51,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-21 01:57:51,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:57:51,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-21 01:57:51,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:57:51,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-21 01:57:51,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:57:51,064 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 01:57:51,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 01:57:51,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121975514] [2022-07-21 01:57:51,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121975514] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:57:51,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:57:51,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 01:57:51,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142578639] [2022-07-21 01:57:51,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:57:51,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 01:57:51,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 01:57:51,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 01:57:51,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 01:57:51,066 INFO L87 Difference]: Start difference. First operand 59 states and 79 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-21 01:57:51,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:57:51,121 INFO L93 Difference]: Finished difference Result 62 states and 82 transitions. [2022-07-21 01:57:51,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 01:57:51,121 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 37 [2022-07-21 01:57:51,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:57:51,122 INFO L225 Difference]: With dead ends: 62 [2022-07-21 01:57:51,122 INFO L226 Difference]: Without dead ends: 60 [2022-07-21 01:57:51,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 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 01:57:51,124 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 3 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 01:57:51,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 172 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 01:57:51,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-21 01:57:51,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-07-21 01:57:51,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 45 states have (on average 1.288888888888889) internal successors, (58), 46 states have internal predecessors, (58), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2022-07-21 01:57:51,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 80 transitions. [2022-07-21 01:57:51,129 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 80 transitions. Word has length 37 [2022-07-21 01:57:51,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:57:51,129 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 80 transitions. [2022-07-21 01:57:51,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-21 01:57:51,129 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 80 transitions. [2022-07-21 01:57:51,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-21 01:57:51,130 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:57:51,130 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:57:51,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 01:57:51,130 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:57:51,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:57:51,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1826594765, now seen corresponding path program 1 times [2022-07-21 01:57:51,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 01:57:51,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308798847] [2022-07-21 01:57:51,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:57:51,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 01:57:51,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 01:57:51,176 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-21 01:57:51,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-21 01:57:51,215 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-21 01:57:51,216 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-21 01:57:51,216 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2022-07-21 01:57:51,218 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 01:57:51,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 01:57:51,220 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2022-07-21 01:57:51,223 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-21 01:57:51,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:57:51 BoogieIcfgContainer [2022-07-21 01:57:51,276 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-21 01:57:51,277 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-21 01:57:51,277 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-21 01:57:51,277 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-21 01:57:51,278 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:57:49" (3/4) ... [2022-07-21 01:57:51,279 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-07-21 01:57:51,280 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-21 01:57:51,280 INFO L158 Benchmark]: Toolchain (without parser) took 2182.14ms. Allocated memory was 52.4MB in the beginning and 67.1MB in the end (delta: 14.7MB). Free memory was 30.2MB in the beginning and 36.9MB in the end (delta: -6.8MB). Peak memory consumption was 6.6MB. Max. memory is 16.1GB. [2022-07-21 01:57:51,280 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 52.4MB. Free memory is still 34.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 01:57:51,281 INFO L158 Benchmark]: CACSL2BoogieTranslator took 204.35ms. Allocated memory is still 52.4MB. Free memory was 30.0MB in the beginning and 36.2MB in the end (delta: -6.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-21 01:57:51,281 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.38ms. Allocated memory is still 52.4MB. Free memory was 36.0MB in the beginning and 34.4MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 01:57:51,281 INFO L158 Benchmark]: Boogie Preprocessor took 42.42ms. Allocated memory is still 52.4MB. Free memory was 34.4MB in the beginning and 33.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-21 01:57:51,281 INFO L158 Benchmark]: RCFGBuilder took 422.70ms. Allocated memory was 52.4MB in the beginning and 67.1MB in the end (delta: 14.7MB). Free memory was 33.0MB in the beginning and 49.5MB in the end (delta: -16.5MB). Peak memory consumption was 16.3MB. Max. memory is 16.1GB. [2022-07-21 01:57:51,282 INFO L158 Benchmark]: TraceAbstraction took 1466.12ms. Allocated memory is still 67.1MB. Free memory was 48.9MB in the beginning and 37.3MB in the end (delta: 11.5MB). Peak memory consumption was 11.8MB. Max. memory is 16.1GB. [2022-07-21 01:57:51,282 INFO L158 Benchmark]: Witness Printer took 2.74ms. Allocated memory is still 67.1MB. Free memory was 37.3MB in the beginning and 36.9MB in the end (delta: 380.5kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 01:57:51,283 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 is still 34.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 204.35ms. Allocated memory is still 52.4MB. Free memory was 30.0MB in the beginning and 36.2MB in the end (delta: -6.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.38ms. Allocated memory is still 52.4MB. Free memory was 36.0MB in the beginning and 34.4MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 42.42ms. Allocated memory is still 52.4MB. Free memory was 34.4MB in the beginning and 33.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 422.70ms. Allocated memory was 52.4MB in the beginning and 67.1MB in the end (delta: 14.7MB). Free memory was 33.0MB in the beginning and 49.5MB in the end (delta: -16.5MB). Peak memory consumption was 16.3MB. Max. memory is 16.1GB. * TraceAbstraction took 1466.12ms. Allocated memory is still 67.1MB. Free memory was 48.9MB in the beginning and 37.3MB in the end (delta: 11.5MB). Peak memory consumption was 11.8MB. Max. memory is 16.1GB. * Witness Printer took 2.74ms. Allocated memory is still 67.1MB. Free memory was 37.3MB in the beginning and 36.9MB in the end (delta: 380.5kB). 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: 76]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 75. Possible FailurePath: [L66] float x = __VERIFIER_nondet_float(); [L67] float y = __VERIFIER_nondet_float(); [L69] CALL, EXPR isnan_float(x) VAL [\old(x)=4286578691] [L57] return x != x; VAL [\old(x)=4286578691, \result=1, x=4286578691] [L69] RET, EXPR isnan_float(x) VAL [isnan_float(x)=1, x=4286578691] [L69] EXPR isnan_float(x) && !isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, x=4286578691] [L69] CALL, EXPR isnan_float(y) VAL [\old(x)=4286578690] [L57] return x != x; VAL [\old(x)=4286578690, \result=0, x=4286578690] [L69] RET, EXPR isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, x=4286578691, y=4286578690] [L69] EXPR isnan_float(x) && !isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, x=4286578691, y=4286578690] [L69-L70] (isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y)) VAL [(isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y))=1, isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, x=4286578691, y=4286578690] [L69-L70] COND TRUE (isnan_float(x) && !isnan_float(y)) || (!isnan_float(x) && isnan_float(y)) [L72] CALL, EXPR fmax_float(x, y) [L46] CALL, EXPR __fpclassify_float(x) VAL [\old(x)=4286578691] [L23] __uint32_t w; VAL [\old(x)=4286578691, x=4286578691] [L26] ieee_float_shape_type gf_u; [L27] gf_u.value = (x) [L28] EXPR gf_u.word [L28] (w) = gf_u.word [L31] COND FALSE !(w == 0x00000000 || w == 0x80000000) VAL [\old(x)=4286578691, w=4286578689, x=4286578691] [L33-L34] COND FALSE !((w >= 0x00800000 && w <= 0x7f7fffff) || (w >= 0x80800000 && w <= 0xff7fffff)) VAL [\old(x)=4286578691, w=4286578689, x=4286578691] [L36-L37] COND FALSE !((w >= 0x00000001 && w <= 0x007fffff) || (w >= 0x80000001 && w <= 0x807fffff)) VAL [\old(x)=4286578691, w=4286578689, x=4286578691] [L39] COND FALSE !(w == 0x7f800000 || w == 0xff800000) [L42] return 0; VAL [\old(x)=4286578691, \result=0, w=4286578689, x=4286578691] [L46] RET, EXPR __fpclassify_float(x) VAL [\old(x)=4286578691, \old(y)=4286578690, __fpclassify_float(x)=0, x=4286578691, y=4286578690] [L46] COND TRUE __fpclassify_float(x) == 0 [L47] return y; VAL [\old(x)=4286578691, \old(y)=4286578690, \result=4286578690, x=4286578691, y=4286578690] [L72] RET, EXPR fmax_float(x, y) [L72] float res = fmax_float(x, y); [L75] CALL, EXPR isnan_float(x) VAL [\old(x)=4286578691] [L57] return x != x; VAL [\old(x)=4286578691, \result=1, x=4286578691] [L75] RET, EXPR isnan_float(x) VAL [isnan_float(x)=1, res=4286578690, x=4286578691, y=4286578690] [L75] EXPR isnan_float(x) && !isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, res=4286578690, x=4286578691, y=4286578690] [L75] CALL, EXPR isnan_float(y) VAL [\old(x)=4286578690] [L57] return x != x; VAL [\old(x)=4286578690, \result=0, x=4286578690] [L75] RET, EXPR isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, res=4286578690, x=4286578691, y=4286578690] [L75] EXPR isnan_float(x) && !isnan_float(y) VAL [isnan_float(x)=1, isnan_float(x) && !isnan_float(y)=1, isnan_float(y)=0, res=4286578690, x=4286578691, y=4286578690] [L75] COND TRUE isnan_float(x) && !isnan_float(y) && res != y [L76] reach_error() VAL [res=4286578690, x=4286578691, y=4286578690] - UnprovableResult [Line: 82]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 57 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 1.4s, OverallIterations: 6, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 33 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 31 mSDsluCounter, 1124 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 759 mSDsCounter, 53 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 233 IncrementalHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 53 mSolverCounterUnsat, 365 mSDtfsCounter, 233 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=5, InterpolantAutomatonStates: 25, 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, 15 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 212 NumberOfCodeBlocks, 212 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 165 ConstructedInterpolants, 0 QuantifiedInterpolants, 276 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 39/39 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 01:57:51,311 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/float_req_bl_1251.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 de540e539c3db6027c1fdb04fcc6cae02aafb8aa58950d31054b2b0b8391af6d --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 01:57:53,052 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 01:57:53,054 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 01:57:53,083 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 01:57:53,083 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 01:57:53,084 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 01:57:53,088 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 01:57:53,091 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 01:57:53,093 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 01:57:53,098 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 01:57:53,099 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 01:57:53,103 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 01:57:53,104 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 01:57:53,105 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 01:57:53,106 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 01:57:53,107 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 01:57:53,108 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 01:57:53,109 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 01:57:53,110 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 01:57:53,111 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 01:57:53,111 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 01:57:53,112 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 01:57:53,113 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 01:57:53,113 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 01:57:53,115 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 01:57:53,117 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 01:57:53,119 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 01:57:53,120 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 01:57:53,121 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 01:57:53,121 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 01:57:53,122 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 01:57:53,122 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 01:57:53,124 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 01:57:53,124 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 01:57:53,125 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 01:57:53,126 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 01:57:53,127 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 01:57:53,127 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 01:57:53,127 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 01:57:53,127 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 01:57:53,128 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 01:57:53,130 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 01:57:53,130 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-07-21 01:57:53,154 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 01:57:53,154 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 01:57:53,154 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 01:57:53,154 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 01:57:53,155 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 01:57:53,155 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 01:57:53,156 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 01:57:53,156 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 01:57:53,156 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 01:57:53,157 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 01:57:53,157 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 01:57:53,157 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 01:57:53,157 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 01:57:53,157 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 01:57:53,164 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 01:57:53,165 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 01:57:53,165 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-21 01:57:53,165 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-21 01:57:53,165 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-21 01:57:53,165 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 01:57:53,165 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 01:57:53,166 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 01:57:53,166 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 01:57:53,166 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 01:57:53,166 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 01:57:53,166 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 01:57:53,167 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 01:57:53,167 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 01:57:53,167 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 01:57:53,167 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 01:57:53,167 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-21 01:57:53,168 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-21 01:57:53,168 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 01:57:53,168 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 01:57:53,168 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 01:57:53,168 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-21 01:57:53,169 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de540e539c3db6027c1fdb04fcc6cae02aafb8aa58950d31054b2b0b8391af6d [2022-07-21 01:57:53,404 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 01:57:53,431 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 01:57:53,432 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 01:57:53,433 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 01:57:53,434 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 01:57:53,435 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-newlib/float_req_bl_1251.c [2022-07-21 01:57:53,489 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6af71976/669bce24d4cd448aabd187acf45c46b9/FLAGb4c610da7 [2022-07-21 01:57:53,880 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 01:57:53,880 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-newlib/float_req_bl_1251.c [2022-07-21 01:57:53,891 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6af71976/669bce24d4cd448aabd187acf45c46b9/FLAGb4c610da7 [2022-07-21 01:57:53,901 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6af71976/669bce24d4cd448aabd187acf45c46b9 [2022-07-21 01:57:53,903 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 01:57:53,905 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 01:57:53,906 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 01:57:53,906 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 01:57:53,909 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 01:57:53,910 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:57:53" (1/1) ... [2022-07-21 01:57:53,911 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5159a8fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:57:53, skipping insertion in model container [2022-07-21 01:57:53,911 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:57:53" (1/1) ... [2022-07-21 01:57:53,916 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 01:57:53,929 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 01:57:54,024 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/float_req_bl_1251.c[1980,1993] [2022-07-21 01:57:54,026 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/float_req_bl_1251.c[2139,2152] [2022-07-21 01:57:54,027 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 01:57:54,034 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 01:57:54,085 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/float_req_bl_1251.c[1980,1993] [2022-07-21 01:57:54,088 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/float_req_bl_1251.c[2139,2152] [2022-07-21 01:57:54,089 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 01:57:54,105 INFO L208 MainTranslator]: Completed translation [2022-07-21 01:57:54,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:57:54 WrapperNode [2022-07-21 01:57:54,108 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 01:57:54,110 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 01:57:54,110 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 01:57:54,110 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 01:57:54,116 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:57:54" (1/1) ... [2022-07-21 01:57:54,132 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:57:54" (1/1) ... [2022-07-21 01:57:54,154 INFO L137 Inliner]: procedures = 21, calls = 22, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 98 [2022-07-21 01:57:54,155 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 01:57:54,156 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 01:57:54,156 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 01:57:54,156 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 01:57:54,162 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:57:54" (1/1) ... [2022-07-21 01:57:54,162 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:57:54" (1/1) ... [2022-07-21 01:57:54,177 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:57:54" (1/1) ... [2022-07-21 01:57:54,178 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:57:54" (1/1) ... [2022-07-21 01:57:54,188 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:57:54" (1/1) ... [2022-07-21 01:57:54,196 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:57:54" (1/1) ... [2022-07-21 01:57:54,198 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:57:54" (1/1) ... [2022-07-21 01:57:54,205 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 01:57:54,206 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 01:57:54,209 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 01:57:54,209 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 01:57:54,210 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:57:54" (1/1) ... [2022-07-21 01:57:54,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 01:57:54,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 01:57:54,241 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 01:57:54,250 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 01:57:54,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 01:57:54,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-21 01:57:54,300 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-21 01:57:54,300 INFO L130 BoogieDeclarations]: Found specification of procedure __fpclassify_float [2022-07-21 01:57:54,300 INFO L138 BoogieDeclarations]: Found implementation of procedure __fpclassify_float [2022-07-21 01:57:54,300 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2022-07-21 01:57:54,300 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2022-07-21 01:57:54,300 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-21 01:57:54,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 01:57:54,300 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 01:57:54,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~intFLOATTYPE4 [2022-07-21 01:57:54,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-21 01:57:54,374 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 01:57:54,375 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 01:57:54,621 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 01:57:54,625 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 01:57:54,626 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-21 01:57:54,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:57:54 BoogieIcfgContainer [2022-07-21 01:57:54,627 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 01:57:54,628 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 01:57:54,628 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 01:57:54,630 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 01:57:54,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:57:53" (1/3) ... [2022-07-21 01:57:54,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f0a7ef8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:57:54, skipping insertion in model container [2022-07-21 01:57:54,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:57:54" (2/3) ... [2022-07-21 01:57:54,645 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f0a7ef8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:57:54, skipping insertion in model container [2022-07-21 01:57:54,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:57:54" (3/3) ... [2022-07-21 01:57:54,646 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1251.c [2022-07-21 01:57:54,656 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 01:57:54,671 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-21 01:57:54,718 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 01:57:54,731 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@77778f41, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@18f9f043 [2022-07-21 01:57:54,735 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-21 01:57:54,745 INFO L276 IsEmpty]: Start isEmpty. Operand has 55 states, 40 states have (on average 1.475) internal successors, (59), 42 states have internal predecessors, (59), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-21 01:57:54,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-21 01:57:54,752 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:57:54,753 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:57:54,754 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:57:54,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:57:54,763 INFO L85 PathProgramCache]: Analyzing trace with hash 956195031, now seen corresponding path program 1 times [2022-07-21 01:57:54,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:57:54,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [986311854] [2022-07-21 01:57:54,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:57:54,773 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:57:54,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:57:54,802 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 01:57:54,804 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 01:57:54,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:57:54,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-21 01:57:54,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 01:57:54,907 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 01:57:54,907 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 01:57:54,907 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 01:57:54,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [986311854] [2022-07-21 01:57:54,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [986311854] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:57:54,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:57:54,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-21 01:57:54,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124706141] [2022-07-21 01:57:54,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:57:54,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-21 01:57:54,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 01:57:54,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-21 01:57:54,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-21 01:57:54,934 INFO L87 Difference]: Start difference. First operand has 55 states, 40 states have (on average 1.475) internal successors, (59), 42 states have internal predecessors, (59), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 01:57:54,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:57:54,956 INFO L93 Difference]: Finished difference Result 93 states and 134 transitions. [2022-07-21 01:57:54,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-21 01:57:54,958 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2022-07-21 01:57:54,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:57:54,963 INFO L225 Difference]: With dead ends: 93 [2022-07-21 01:57:54,963 INFO L226 Difference]: Without dead ends: 51 [2022-07-21 01:57:54,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 26 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 01:57:54,968 INFO L413 NwaCegarLoop]: 75 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, 75 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 01:57:54,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 01:57:54,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-21 01:57:54,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-07-21 01:57:54,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 38 states have internal predecessors, (50), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-21 01:57:54,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 70 transitions. [2022-07-21 01:57:54,998 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 70 transitions. Word has length 27 [2022-07-21 01:57:54,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:57:54,999 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 70 transitions. [2022-07-21 01:57:55,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 10.5) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 01:57:55,000 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 70 transitions. [2022-07-21 01:57:55,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-21 01:57:55,001 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:57:55,002 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:57:55,024 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 01:57:55,222 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 01:57:55,223 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:57:55,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:57:55,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1128254016, now seen corresponding path program 1 times [2022-07-21 01:57:55,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:57:55,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [286679595] [2022-07-21 01:57:55,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:57:55,227 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:57:55,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:57:55,248 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 01:57:55,271 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 01:57:55,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:57:55,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 01:57:55,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 01:57:55,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 01:57:55,367 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 01:57:55,367 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 01:57:55,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [286679595] [2022-07-21 01:57:55,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [286679595] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:57:55,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:57:55,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 01:57:55,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000090969] [2022-07-21 01:57:55,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:57:55,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 01:57:55,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 01:57:55,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 01:57:55,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 01:57:55,370 INFO L87 Difference]: Start difference. First operand 51 states and 70 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 01:57:55,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:57:55,399 INFO L93 Difference]: Finished difference Result 96 states and 131 transitions. [2022-07-21 01:57:55,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 01:57:55,400 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2022-07-21 01:57:55,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:57:55,401 INFO L225 Difference]: With dead ends: 96 [2022-07-21 01:57:55,401 INFO L226 Difference]: Without dead ends: 60 [2022-07-21 01:57:55,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-21 01:57:55,402 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 16 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 01:57:55,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 192 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 01:57:55,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-21 01:57:55,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 53. [2022-07-21 01:57:55,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 40 states have internal predecessors, (52), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-21 01:57:55,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 72 transitions. [2022-07-21 01:57:55,409 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 72 transitions. Word has length 28 [2022-07-21 01:57:55,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:57:55,409 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 72 transitions. [2022-07-21 01:57:55,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-21 01:57:55,410 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 72 transitions. [2022-07-21 01:57:55,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-21 01:57:55,410 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:57:55,411 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:57:55,421 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2022-07-21 01:57:55,618 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 01:57:55,619 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:57:55,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:57:55,619 INFO L85 PathProgramCache]: Analyzing trace with hash 987158491, now seen corresponding path program 1 times [2022-07-21 01:57:55,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:57:55,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1872433301] [2022-07-21 01:57:55,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:57:55,620 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:57:55,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:57:55,621 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 01:57:55,640 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 01:57:55,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:57:55,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 01:57:55,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 01:57:55,731 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 01:57:55,731 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 01:57:55,732 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 01:57:55,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1872433301] [2022-07-21 01:57:55,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1872433301] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:57:55,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:57:55,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 01:57:55,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888335008] [2022-07-21 01:57:55,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:57:55,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 01:57:55,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 01:57:55,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 01:57:55,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 01:57:55,734 INFO L87 Difference]: Start difference. First operand 53 states and 72 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 01:57:55,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:57:55,750 INFO L93 Difference]: Finished difference Result 76 states and 101 transitions. [2022-07-21 01:57:55,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 01:57:55,751 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2022-07-21 01:57:55,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:57:55,752 INFO L225 Difference]: With dead ends: 76 [2022-07-21 01:57:55,752 INFO L226 Difference]: Without dead ends: 56 [2022-07-21 01:57:55,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 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 01:57:55,753 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 0 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 198 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 01:57:55,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 198 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 01:57:55,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-07-21 01:57:55,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-07-21 01:57:55,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 42 states have internal predecessors, (54), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2022-07-21 01:57:55,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 76 transitions. [2022-07-21 01:57:55,764 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 76 transitions. Word has length 33 [2022-07-21 01:57:55,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:57:55,764 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 76 transitions. [2022-07-21 01:57:55,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 01:57:55,765 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 76 transitions. [2022-07-21 01:57:55,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-21 01:57:55,765 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:57:55,766 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:57:55,773 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-07-21 01:57:55,973 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 01:57:55,973 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:57:55,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:57:55,974 INFO L85 PathProgramCache]: Analyzing trace with hash 871427583, now seen corresponding path program 1 times [2022-07-21 01:57:55,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:57:55,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [959311784] [2022-07-21 01:57:55,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:57:55,975 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:57:55,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:57:55,976 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 01:57:55,977 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 01:57:56,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:57:56,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 01:57:56,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 01:57:56,043 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 01:57:56,043 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 01:57:56,043 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 01:57:56,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [959311784] [2022-07-21 01:57:56,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [959311784] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:57:56,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:57:56,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 01:57:56,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365919669] [2022-07-21 01:57:56,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:57:56,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 01:57:56,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 01:57:56,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 01:57:56,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 01:57:56,046 INFO L87 Difference]: Start difference. First operand 56 states and 76 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 01:57:56,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:57:56,069 INFO L93 Difference]: Finished difference Result 79 states and 105 transitions. [2022-07-21 01:57:56,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 01:57:56,070 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2022-07-21 01:57:56,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:57:56,071 INFO L225 Difference]: With dead ends: 79 [2022-07-21 01:57:56,071 INFO L226 Difference]: Without dead ends: 59 [2022-07-21 01:57:56,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 31 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 01:57:56,072 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 0 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 01:57:56,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 207 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 01:57:56,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-21 01:57:56,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2022-07-21 01:57:56,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 42 states have internal predecessors, (54), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2022-07-21 01:57:56,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 76 transitions. [2022-07-21 01:57:56,093 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 76 transitions. Word has length 34 [2022-07-21 01:57:56,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:57:56,093 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 76 transitions. [2022-07-21 01:57:56,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 01:57:56,094 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 76 transitions. [2022-07-21 01:57:56,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-21 01:57:56,095 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:57:56,095 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:57:56,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-21 01:57:56,311 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 01:57:56,311 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:57:56,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:57:56,312 INFO L85 PathProgramCache]: Analyzing trace with hash 405124703, now seen corresponding path program 1 times [2022-07-21 01:57:56,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:57:56,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1265304534] [2022-07-21 01:57:56,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:57:56,312 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:57:56,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:57:56,317 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 01:57:56,318 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 01:57:56,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:57:56,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 01:57:56,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 01:57:56,377 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 01:57:56,378 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 01:57:56,378 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 01:57:56,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1265304534] [2022-07-21 01:57:56,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1265304534] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:57:56,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:57:56,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 01:57:56,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969753943] [2022-07-21 01:57:56,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:57:56,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 01:57:56,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 01:57:56,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 01:57:56,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 01:57:56,380 INFO L87 Difference]: Start difference. First operand 56 states and 76 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 01:57:56,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:57:56,402 INFO L93 Difference]: Finished difference Result 79 states and 105 transitions. [2022-07-21 01:57:56,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 01:57:56,402 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2022-07-21 01:57:56,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:57:56,403 INFO L225 Difference]: With dead ends: 79 [2022-07-21 01:57:56,403 INFO L226 Difference]: Without dead ends: 59 [2022-07-21 01:57:56,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 32 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 01:57:56,404 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 0 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 01:57:56,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 207 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 01:57:56,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-21 01:57:56,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2022-07-21 01:57:56,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 42 states have internal predecessors, (54), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2022-07-21 01:57:56,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 76 transitions. [2022-07-21 01:57:56,409 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 76 transitions. Word has length 35 [2022-07-21 01:57:56,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:57:56,409 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 76 transitions. [2022-07-21 01:57:56,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 01:57:56,410 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 76 transitions. [2022-07-21 01:57:56,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-21 01:57:56,411 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:57:56,411 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:57:56,421 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 01:57:56,621 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 01:57:56,622 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:57:56,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:57:56,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1955992579, now seen corresponding path program 1 times [2022-07-21 01:57:56,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:57:56,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1964022082] [2022-07-21 01:57:56,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:57:56,623 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:57:56,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:57:56,624 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 01:57:56,626 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 01:57:56,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:57:56,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 01:57:56,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 01:57:56,680 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 01:57:56,681 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 01:57:56,681 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 01:57:56,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1964022082] [2022-07-21 01:57:56,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1964022082] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:57:56,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:57:56,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 01:57:56,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266956934] [2022-07-21 01:57:56,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:57:56,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 01:57:56,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 01:57:56,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 01:57:56,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 01:57:56,682 INFO L87 Difference]: Start difference. First operand 56 states and 76 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 01:57:56,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:57:56,699 INFO L93 Difference]: Finished difference Result 79 states and 105 transitions. [2022-07-21 01:57:56,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 01:57:56,700 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2022-07-21 01:57:56,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:57:56,700 INFO L225 Difference]: With dead ends: 79 [2022-07-21 01:57:56,700 INFO L226 Difference]: Without dead ends: 59 [2022-07-21 01:57:56,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 33 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 01:57:56,701 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 0 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 01:57:56,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 207 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 01:57:56,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-21 01:57:56,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2022-07-21 01:57:56,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 42 states have internal predecessors, (54), 10 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (12), 11 states have call predecessors, (12), 10 states have call successors, (12) [2022-07-21 01:57:56,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 76 transitions. [2022-07-21 01:57:56,705 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 76 transitions. Word has length 36 [2022-07-21 01:57:56,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:57:56,706 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 76 transitions. [2022-07-21 01:57:56,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-21 01:57:56,706 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 76 transitions. [2022-07-21 01:57:56,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-21 01:57:56,707 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:57:56,707 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:57:56,718 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 01:57:56,918 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 01:57:56,918 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:57:56,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:57:56,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1662589572, now seen corresponding path program 1 times [2022-07-21 01:57:56,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:57:56,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1449625096] [2022-07-21 01:57:56,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:57:56,919 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:57:56,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:57:56,920 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 01:57:56,923 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 01:57:56,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:57:56,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 01:57:56,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 01:57:57,131 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 01:57:57,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 01:57:57,300 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 01:57:57,300 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 01:57:57,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1449625096] [2022-07-21 01:57:57,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1449625096] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 01:57:57,301 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 01:57:57,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2022-07-21 01:57:57,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452575541] [2022-07-21 01:57:57,301 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 01:57:57,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 01:57:57,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 01:57:57,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 01:57:57,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-07-21 01:57:57,302 INFO L87 Difference]: Start difference. First operand 56 states and 76 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-21 01:57:57,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:57:57,656 INFO L93 Difference]: Finished difference Result 102 states and 138 transitions. [2022-07-21 01:57:57,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 01:57:57,657 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) Word has length 36 [2022-07-21 01:57:57,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:57:57,658 INFO L225 Difference]: With dead ends: 102 [2022-07-21 01:57:57,658 INFO L226 Difference]: Without dead ends: 88 [2022-07-21 01:57:57,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-07-21 01:57:57,659 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 103 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 01:57:57,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 639 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 01:57:57,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-21 01:57:57,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 74. [2022-07-21 01:57:57,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 54 states have (on average 1.3148148148148149) internal successors, (71), 54 states have internal predecessors, (71), 15 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (19), 17 states have call predecessors, (19), 15 states have call successors, (19) [2022-07-21 01:57:57,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 105 transitions. [2022-07-21 01:57:57,665 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 105 transitions. Word has length 36 [2022-07-21 01:57:57,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:57:57,666 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 105 transitions. [2022-07-21 01:57:57,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-21 01:57:57,666 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 105 transitions. [2022-07-21 01:57:57,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-21 01:57:57,667 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:57:57,667 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:57:57,688 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 01:57:57,874 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 01:57:57,875 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:57:57,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:57:57,875 INFO L85 PathProgramCache]: Analyzing trace with hash 2045835875, now seen corresponding path program 1 times [2022-07-21 01:57:57,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:57:57,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [456566041] [2022-07-21 01:57:57,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:57:57,876 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:57:57,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:57:57,877 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 01:57:57,879 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 01:57:57,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:57:57,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 01:57:57,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 01:57:58,059 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-21 01:57:58,059 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 01:57:58,059 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 01:57:58,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [456566041] [2022-07-21 01:57:58,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [456566041] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:57:58,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:57:58,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-21 01:57:58,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764093097] [2022-07-21 01:57:58,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:57:58,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-21 01:57:58,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 01:57:58,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-21 01:57:58,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-21 01:57:58,061 INFO L87 Difference]: Start difference. First operand 74 states and 105 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-21 01:57:58,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:57:58,372 INFO L93 Difference]: Finished difference Result 127 states and 174 transitions. [2022-07-21 01:57:58,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 01:57:58,373 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2022-07-21 01:57:58,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:57:58,374 INFO L225 Difference]: With dead ends: 127 [2022-07-21 01:57:58,374 INFO L226 Difference]: Without dead ends: 87 [2022-07-21 01:57:58,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-07-21 01:57:58,375 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 56 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 01:57:58,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 498 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 01:57:58,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-07-21 01:57:58,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 74. [2022-07-21 01:57:58,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 54 states have (on average 1.2962962962962963) internal successors, (70), 54 states have internal predecessors, (70), 15 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (19), 17 states have call predecessors, (19), 15 states have call successors, (19) [2022-07-21 01:57:58,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 104 transitions. [2022-07-21 01:57:58,380 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 104 transitions. Word has length 38 [2022-07-21 01:57:58,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:57:58,380 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 104 transitions. [2022-07-21 01:57:58,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-21 01:57:58,380 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 104 transitions. [2022-07-21 01:57:58,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-21 01:57:58,381 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:57:58,381 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:57:58,391 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 01:57:58,589 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 01:57:58,589 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:57:58,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:57:58,590 INFO L85 PathProgramCache]: Analyzing trace with hash -490349503, now seen corresponding path program 1 times [2022-07-21 01:57:58,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:57:58,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1553003378] [2022-07-21 01:57:58,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:57:58,591 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:57:58,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:57:58,592 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 01:57:58,593 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 01:57:58,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:57:58,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 01:57:58,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 01:57:58,985 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-21 01:57:58,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 01:57:59,114 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-21 01:57:59,114 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 01:57:59,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1553003378] [2022-07-21 01:57:59,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1553003378] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 01:57:59,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 01:57:59,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-07-21 01:57:59,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198826159] [2022-07-21 01:57:59,114 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 01:57:59,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-21 01:57:59,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 01:57:59,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-21 01:57:59,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2022-07-21 01:57:59,115 INFO L87 Difference]: Start difference. First operand 74 states and 104 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (8), 1 states have call predecessors, (8), 3 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-21 01:57:59,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:57:59,912 INFO L93 Difference]: Finished difference Result 117 states and 162 transitions. [2022-07-21 01:57:59,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 01:57:59,913 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (8), 1 states have call predecessors, (8), 3 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) Word has length 41 [2022-07-21 01:57:59,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:57:59,914 INFO L225 Difference]: With dead ends: 117 [2022-07-21 01:57:59,914 INFO L226 Difference]: Without dead ends: 115 [2022-07-21 01:57:59,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2022-07-21 01:57:59,915 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 149 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 01:57:59,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 463 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-21 01:57:59,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-21 01:57:59,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 84. [2022-07-21 01:57:59,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 61 states have (on average 1.278688524590164) internal successors, (78), 61 states have internal predecessors, (78), 18 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (23), 20 states have call predecessors, (23), 18 states have call successors, (23) [2022-07-21 01:57:59,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 119 transitions. [2022-07-21 01:57:59,922 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 119 transitions. Word has length 41 [2022-07-21 01:57:59,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:57:59,923 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 119 transitions. [2022-07-21 01:57:59,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 15 states have internal predecessors, (39), 5 states have call successors, (8), 1 states have call predecessors, (8), 3 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-21 01:57:59,923 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 119 transitions. [2022-07-21 01:57:59,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-21 01:57:59,932 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:57:59,932 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:57:59,944 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 01:58:00,142 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 01:58:00,143 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:58:00,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:58:00,143 INFO L85 PathProgramCache]: Analyzing trace with hash 38675638, now seen corresponding path program 1 times [2022-07-21 01:58:00,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:58:00,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1536668495] [2022-07-21 01:58:00,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:58:00,144 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:58:00,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:58:00,145 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 01:58:00,147 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 01:58:00,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:58:00,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-21 01:58:00,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 01:58:00,192 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-21 01:58:00,192 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 01:58:00,192 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 01:58:00,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1536668495] [2022-07-21 01:58:00,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1536668495] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:58:00,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:58:00,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 01:58:00,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588108750] [2022-07-21 01:58:00,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:58:00,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 01:58:00,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 01:58:00,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 01:58:00,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 01:58:00,194 INFO L87 Difference]: Start difference. First operand 84 states and 119 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-21 01:58:00,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:58:00,202 INFO L93 Difference]: Finished difference Result 87 states and 122 transitions. [2022-07-21 01:58:00,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 01:58:00,202 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 43 [2022-07-21 01:58:00,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:58:00,203 INFO L225 Difference]: With dead ends: 87 [2022-07-21 01:58:00,203 INFO L226 Difference]: Without dead ends: 85 [2022-07-21 01:58:00,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 41 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 01:58:00,204 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 0 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 01:58:00,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 133 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 01:58:00,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-07-21 01:58:00,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2022-07-21 01:58:00,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 61 states have (on average 1.278688524590164) internal successors, (78), 61 states have internal predecessors, (78), 18 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (23), 20 states have call predecessors, (23), 18 states have call successors, (23) [2022-07-21 01:58:00,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 119 transitions. [2022-07-21 01:58:00,208 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 119 transitions. Word has length 43 [2022-07-21 01:58:00,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:58:00,209 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 119 transitions. [2022-07-21 01:58:00,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-21 01:58:00,209 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 119 transitions. [2022-07-21 01:58:00,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-21 01:58:00,210 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:58:00,210 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:58:00,233 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 01:58:00,417 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 01:58:00,417 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:58:00,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:58:00,418 INFO L85 PathProgramCache]: Analyzing trace with hash 972082008, now seen corresponding path program 1 times [2022-07-21 01:58:00,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:58:00,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [875046615] [2022-07-21 01:58:00,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:58:00,419 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:58:00,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:58:00,420 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 01:58:00,421 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 01:58:00,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:58:00,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 01:58:00,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 01:58:00,478 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 01:58:00,478 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 01:58:00,478 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 01:58:00,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [875046615] [2022-07-21 01:58:00,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [875046615] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:58:00,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:58:00,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 01:58:00,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450448709] [2022-07-21 01:58:00,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:58:00,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 01:58:00,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 01:58:00,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 01:58:00,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 01:58:00,480 INFO L87 Difference]: Start difference. First operand 84 states and 119 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-21 01:58:00,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:58:00,495 INFO L93 Difference]: Finished difference Result 113 states and 159 transitions. [2022-07-21 01:58:00,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 01:58:00,495 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 46 [2022-07-21 01:58:00,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:58:00,496 INFO L225 Difference]: With dead ends: 113 [2022-07-21 01:58:00,496 INFO L226 Difference]: Without dead ends: 88 [2022-07-21 01:58:00,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 43 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 01:58:00,497 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 0 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 198 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 01:58:00,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 198 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 01:58:00,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-21 01:58:00,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-07-21 01:58:00,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 64 states have (on average 1.265625) internal successors, (81), 63 states have internal predecessors, (81), 18 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (28), 22 states have call predecessors, (28), 18 states have call successors, (28) [2022-07-21 01:58:00,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 127 transitions. [2022-07-21 01:58:00,501 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 127 transitions. Word has length 46 [2022-07-21 01:58:00,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:58:00,502 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 127 transitions. [2022-07-21 01:58:00,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-21 01:58:00,502 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 127 transitions. [2022-07-21 01:58:00,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-21 01:58:00,503 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:58:00,503 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:58:00,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-21 01:58:00,711 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 01:58:00,711 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:58:00,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:58:00,712 INFO L85 PathProgramCache]: Analyzing trace with hash 411048800, now seen corresponding path program 1 times [2022-07-21 01:58:00,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:58:00,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1777435024] [2022-07-21 01:58:00,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:58:00,713 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:58:00,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:58:00,714 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 01:58:00,716 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 01:58:00,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:58:00,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 01:58:00,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 01:58:00,784 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 01:58:00,784 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 01:58:00,784 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 01:58:00,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1777435024] [2022-07-21 01:58:00,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1777435024] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:58:00,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:58:00,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 01:58:00,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953600474] [2022-07-21 01:58:00,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:58:00,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 01:58:00,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 01:58:00,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 01:58:00,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 01:58:00,786 INFO L87 Difference]: Start difference. First operand 88 states and 127 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-21 01:58:00,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:58:00,805 INFO L93 Difference]: Finished difference Result 117 states and 167 transitions. [2022-07-21 01:58:00,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 01:58:00,805 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 47 [2022-07-21 01:58:00,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:58:00,806 INFO L225 Difference]: With dead ends: 117 [2022-07-21 01:58:00,807 INFO L226 Difference]: Without dead ends: 92 [2022-07-21 01:58:00,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 44 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 01:58:00,807 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 0 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 01:58:00,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 207 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 01:58:00,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-21 01:58:00,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2022-07-21 01:58:00,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 64 states have (on average 1.265625) internal successors, (81), 63 states have internal predecessors, (81), 18 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (28), 22 states have call predecessors, (28), 18 states have call successors, (28) [2022-07-21 01:58:00,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 127 transitions. [2022-07-21 01:58:00,812 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 127 transitions. Word has length 47 [2022-07-21 01:58:00,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:58:00,813 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 127 transitions. [2022-07-21 01:58:00,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-21 01:58:00,813 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 127 transitions. [2022-07-21 01:58:00,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-21 01:58:00,814 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:58:00,814 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:58:00,825 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 01:58:01,022 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 01:58:01,023 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:58:01,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:58:01,024 INFO L85 PathProgramCache]: Analyzing trace with hash -877982242, now seen corresponding path program 1 times [2022-07-21 01:58:01,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:58:01,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1669404228] [2022-07-21 01:58:01,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:58:01,024 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:58:01,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:58:01,025 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 01:58:01,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-21 01:58:01,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:58:01,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-21 01:58:01,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 01:58:01,201 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 01:58:01,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 01:58:01,293 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 01:58:01,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1669404228] [2022-07-21 01:58:01,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1669404228] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 01:58:01,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1925289186] [2022-07-21 01:58:01,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:58:01,294 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-21 01:58:01,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-21 01:58:01,295 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-21 01:58:01,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2022-07-21 01:58:01,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:58:01,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-21 01:58:01,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 01:58:01,544 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 01:58:01,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 01:58:01,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1925289186] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 01:58:01,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 01:58:01,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2022-07-21 01:58:01,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852674386] [2022-07-21 01:58:01,559 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 01:58:01,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 01:58:01,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 01:58:01,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 01:58:01,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-21 01:58:01,560 INFO L87 Difference]: Start difference. First operand 88 states and 127 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-21 01:58:01,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:58:01,794 INFO L93 Difference]: Finished difference Result 123 states and 168 transitions. [2022-07-21 01:58:01,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-21 01:58:01,795 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 48 [2022-07-21 01:58:01,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:58:01,796 INFO L225 Difference]: With dead ends: 123 [2022-07-21 01:58:01,796 INFO L226 Difference]: Without dead ends: 102 [2022-07-21 01:58:01,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-07-21 01:58:01,797 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 68 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 01:58:01,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 309 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 01:58:01,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-07-21 01:58:01,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 88. [2022-07-21 01:58:01,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 64 states have (on average 1.25) internal successors, (80), 63 states have internal predecessors, (80), 18 states have call successors, (18), 2 states have call predecessors, (18), 4 states have return successors, (28), 22 states have call predecessors, (28), 18 states have call successors, (28) [2022-07-21 01:58:01,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 126 transitions. [2022-07-21 01:58:01,801 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 126 transitions. Word has length 48 [2022-07-21 01:58:01,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:58:01,801 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 126 transitions. [2022-07-21 01:58:01,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-21 01:58:01,801 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 126 transitions. [2022-07-21 01:58:01,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-21 01:58:01,802 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:58:01,802 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:58:01,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2022-07-21 01:58:02,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-21 01:58:02,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 01:58:02,206 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:58:02,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:58:02,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1899050596, now seen corresponding path program 1 times [2022-07-21 01:58:02,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:58:02,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1513885961] [2022-07-21 01:58:02,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:58:02,206 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:58:02,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:58:02,208 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 01:58:02,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-21 01:58:02,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:58:02,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-21 01:58:02,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 01:58:02,544 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-21 01:58:02,545 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 01:58:02,545 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 01:58:02,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1513885961] [2022-07-21 01:58:02,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1513885961] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:58:02,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:58:02,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-21 01:58:02,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345999861] [2022-07-21 01:58:02,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:58:02,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 01:58:02,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 01:58:02,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 01:58:02,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-21 01:58:02,546 INFO L87 Difference]: Start difference. First operand 88 states and 126 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 3 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-21 01:58:03,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:58:03,168 INFO L93 Difference]: Finished difference Result 137 states and 191 transitions. [2022-07-21 01:58:03,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 01:58:03,169 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 3 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 48 [2022-07-21 01:58:03,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:58:03,170 INFO L225 Difference]: With dead ends: 137 [2022-07-21 01:58:03,170 INFO L226 Difference]: Without dead ends: 135 [2022-07-21 01:58:03,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-07-21 01:58:03,170 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 91 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 01:58:03,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 513 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 01:58:03,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-07-21 01:58:03,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 100. [2022-07-21 01:58:03,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 74 states have (on average 1.2432432432432432) internal successors, (92), 72 states have internal predecessors, (92), 19 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (34), 25 states have call predecessors, (34), 19 states have call successors, (34) [2022-07-21 01:58:03,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 145 transitions. [2022-07-21 01:58:03,178 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 145 transitions. Word has length 48 [2022-07-21 01:58:03,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:58:03,178 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 145 transitions. [2022-07-21 01:58:03,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 3 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-21 01:58:03,178 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 145 transitions. [2022-07-21 01:58:03,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-21 01:58:03,179 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:58:03,179 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:58:03,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-21 01:58:03,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 01:58:03,389 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:58:03,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:58:03,390 INFO L85 PathProgramCache]: Analyzing trace with hash 505566420, now seen corresponding path program 1 times [2022-07-21 01:58:03,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:58:03,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1940392055] [2022-07-21 01:58:03,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:58:03,391 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:58:03,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:58:03,392 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 01:58:03,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-07-21 01:58:03,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:58:03,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 01:58:03,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 01:58:03,456 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 01:58:03,456 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 01:58:03,456 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 01:58:03,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1940392055] [2022-07-21 01:58:03,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1940392055] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:58:03,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:58:03,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 01:58:03,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711204013] [2022-07-21 01:58:03,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:58:03,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 01:58:03,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 01:58:03,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 01:58:03,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 01:58:03,458 INFO L87 Difference]: Start difference. First operand 100 states and 145 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-21 01:58:03,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:58:03,477 INFO L93 Difference]: Finished difference Result 129 states and 185 transitions. [2022-07-21 01:58:03,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 01:58:03,477 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 48 [2022-07-21 01:58:03,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:58:03,478 INFO L225 Difference]: With dead ends: 129 [2022-07-21 01:58:03,478 INFO L226 Difference]: Without dead ends: 104 [2022-07-21 01:58:03,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 45 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 01:58:03,479 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 0 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 01:58:03,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 207 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 01:58:03,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-07-21 01:58:03,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2022-07-21 01:58:03,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 74 states have (on average 1.2432432432432432) internal successors, (92), 72 states have internal predecessors, (92), 19 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (34), 25 states have call predecessors, (34), 19 states have call successors, (34) [2022-07-21 01:58:03,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 145 transitions. [2022-07-21 01:58:03,484 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 145 transitions. Word has length 48 [2022-07-21 01:58:03,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:58:03,484 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 145 transitions. [2022-07-21 01:58:03,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-21 01:58:03,485 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 145 transitions. [2022-07-21 01:58:03,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-21 01:58:03,485 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:58:03,485 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:58:03,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-07-21 01:58:03,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 01:58:03,694 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:58:03,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:58:03,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1437385679, now seen corresponding path program 1 times [2022-07-21 01:58:03,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:58:03,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1431170733] [2022-07-21 01:58:03,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:58:03,695 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:58:03,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:58:03,696 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 01:58:03,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-21 01:58:03,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:58:03,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 01:58:03,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 01:58:03,901 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-21 01:58:03,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 01:58:04,127 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-21 01:58:04,128 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 01:58:04,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1431170733] [2022-07-21 01:58:04,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1431170733] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 01:58:04,128 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 01:58:04,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2022-07-21 01:58:04,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782670180] [2022-07-21 01:58:04,128 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 01:58:04,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-21 01:58:04,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 01:58:04,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-21 01:58:04,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-07-21 01:58:04,130 INFO L87 Difference]: Start difference. First operand 100 states and 145 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 5 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-21 01:58:04,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:58:04,616 INFO L93 Difference]: Finished difference Result 122 states and 170 transitions. [2022-07-21 01:58:04,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-21 01:58:04,617 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 5 states have call predecessors, (8), 2 states have call successors, (8) Word has length 48 [2022-07-21 01:58:04,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:58:04,617 INFO L225 Difference]: With dead ends: 122 [2022-07-21 01:58:04,617 INFO L226 Difference]: Without dead ends: 99 [2022-07-21 01:58:04,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-07-21 01:58:04,618 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 86 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 01:58:04,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 443 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 01:58:04,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-21 01:58:04,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 95. [2022-07-21 01:58:04,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 69 states have internal predecessors, (85), 19 states have call successors, (19), 2 states have call predecessors, (19), 5 states have return successors, (33), 23 states have call predecessors, (33), 19 states have call successors, (33) [2022-07-21 01:58:04,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 137 transitions. [2022-07-21 01:58:04,628 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 137 transitions. Word has length 48 [2022-07-21 01:58:04,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:58:04,629 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 137 transitions. [2022-07-21 01:58:04,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 5 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-21 01:58:04,629 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 137 transitions. [2022-07-21 01:58:04,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-21 01:58:04,630 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:58:04,630 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:58:04,638 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-07-21 01:58:04,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 01:58:04,841 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:58:04,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:58:04,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1803392071, now seen corresponding path program 1 times [2022-07-21 01:58:04,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:58:04,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1456024919] [2022-07-21 01:58:04,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:58:04,842 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:58:04,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:58:04,845 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 01:58:04,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-21 01:58:04,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:58:04,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-21 01:58:04,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 01:58:05,016 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-21 01:58:05,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 01:58:05,141 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-21 01:58:05,141 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 01:58:05,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1456024919] [2022-07-21 01:58:05,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1456024919] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 01:58:05,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 01:58:05,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2022-07-21 01:58:05,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652506101] [2022-07-21 01:58:05,141 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 01:58:05,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 01:58:05,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 01:58:05,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 01:58:05,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-07-21 01:58:05,142 INFO L87 Difference]: Start difference. First operand 95 states and 137 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 10 states have internal predecessors, (47), 3 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (11), 6 states have call predecessors, (11), 3 states have call successors, (11) [2022-07-21 01:58:05,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:58:05,482 INFO L93 Difference]: Finished difference Result 133 states and 178 transitions. [2022-07-21 01:58:05,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-21 01:58:05,482 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 10 states have internal predecessors, (47), 3 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (11), 6 states have call predecessors, (11), 3 states have call successors, (11) Word has length 48 [2022-07-21 01:58:05,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:58:05,483 INFO L225 Difference]: With dead ends: 133 [2022-07-21 01:58:05,483 INFO L226 Difference]: Without dead ends: 89 [2022-07-21 01:58:05,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2022-07-21 01:58:05,483 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 48 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 01:58:05,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 530 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 01:58:05,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-21 01:58:05,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 86. [2022-07-21 01:58:05,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 63 states have internal predecessors, (76), 16 states have call successors, (16), 2 states have call predecessors, (16), 5 states have return successors, (27), 20 states have call predecessors, (27), 16 states have call successors, (27) [2022-07-21 01:58:05,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 119 transitions. [2022-07-21 01:58:05,488 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 119 transitions. Word has length 48 [2022-07-21 01:58:05,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:58:05,488 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 119 transitions. [2022-07-21 01:58:05,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 10 states have internal predecessors, (47), 3 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (11), 6 states have call predecessors, (11), 3 states have call successors, (11) [2022-07-21 01:58:05,488 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 119 transitions. [2022-07-21 01:58:05,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-21 01:58:05,488 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:58:05,488 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:58:05,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-07-21 01:58:05,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 01:58:05,701 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:58:05,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:58:05,702 INFO L85 PathProgramCache]: Analyzing trace with hash -495361713, now seen corresponding path program 1 times [2022-07-21 01:58:05,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:58:05,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1573024707] [2022-07-21 01:58:05,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:58:05,702 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:58:05,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:58:05,703 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 01:58:05,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-21 01:58:05,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:58:05,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-21 01:58:05,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 01:58:05,870 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 01:58:05,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 01:58:06,020 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-21 01:58:06,020 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 01:58:06,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1573024707] [2022-07-21 01:58:06,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1573024707] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 01:58:06,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 01:58:06,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2022-07-21 01:58:06,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640521089] [2022-07-21 01:58:06,021 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 01:58:06,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-21 01:58:06,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 01:58:06,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-21 01:58:06,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-07-21 01:58:06,021 INFO L87 Difference]: Start difference. First operand 86 states and 119 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 9 states have internal predecessors, (38), 3 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-21 01:58:06,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:58:06,216 INFO L93 Difference]: Finished difference Result 101 states and 133 transitions. [2022-07-21 01:58:06,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 01:58:06,217 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 9 states have internal predecessors, (38), 3 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) Word has length 48 [2022-07-21 01:58:06,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:58:06,218 INFO L225 Difference]: With dead ends: 101 [2022-07-21 01:58:06,218 INFO L226 Difference]: Without dead ends: 82 [2022-07-21 01:58:06,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-07-21 01:58:06,218 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 48 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 01:58:06,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 503 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 01:58:06,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-21 01:58:06,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 74. [2022-07-21 01:58:06,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 55 states have internal predecessors, (63), 13 states have call successors, (13), 2 states have call predecessors, (13), 5 states have return successors, (24), 16 states have call predecessors, (24), 13 states have call successors, (24) [2022-07-21 01:58:06,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 100 transitions. [2022-07-21 01:58:06,221 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 100 transitions. Word has length 48 [2022-07-21 01:58:06,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:58:06,222 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 100 transitions. [2022-07-21 01:58:06,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 9 states have internal predecessors, (38), 3 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-21 01:58:06,222 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 100 transitions. [2022-07-21 01:58:06,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-21 01:58:06,222 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:58:06,222 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:58:06,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-21 01:58:06,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 01:58:06,430 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:58:06,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:58:06,431 INFO L85 PathProgramCache]: Analyzing trace with hash 113915812, now seen corresponding path program 1 times [2022-07-21 01:58:06,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:58:06,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2139629628] [2022-07-21 01:58:06,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:58:06,431 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:58:06,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:58:06,432 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 01:58:06,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-21 01:58:06,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:58:06,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-21 01:58:06,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 01:58:06,892 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-21 01:58:06,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 01:58:07,060 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-21 01:58:07,060 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 01:58:07,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2139629628] [2022-07-21 01:58:07,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2139629628] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 01:58:07,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 01:58:07,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2022-07-21 01:58:07,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297062324] [2022-07-21 01:58:07,060 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 01:58:07,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-21 01:58:07,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 01:58:07,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-21 01:58:07,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-07-21 01:58:07,061 INFO L87 Difference]: Start difference. First operand 74 states and 100 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 17 states have internal predecessors, (44), 5 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2022-07-21 01:58:07,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:58:07,369 INFO L93 Difference]: Finished difference Result 84 states and 111 transitions. [2022-07-21 01:58:07,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 01:58:07,370 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 17 states have internal predecessors, (44), 5 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) Word has length 49 [2022-07-21 01:58:07,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:58:07,370 INFO L225 Difference]: With dead ends: 84 [2022-07-21 01:58:07,370 INFO L226 Difference]: Without dead ends: 72 [2022-07-21 01:58:07,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2022-07-21 01:58:07,371 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 81 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 01:58:07,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 309 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 01:58:07,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-07-21 01:58:07,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2022-07-21 01:58:07,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 50 states have (on average 1.16) internal successors, (58), 51 states have internal predecessors, (58), 13 states have call successors, (13), 2 states have call predecessors, (13), 4 states have return successors, (20), 15 states have call predecessors, (20), 13 states have call successors, (20) [2022-07-21 01:58:07,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 91 transitions. [2022-07-21 01:58:07,374 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 91 transitions. Word has length 49 [2022-07-21 01:58:07,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:58:07,374 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 91 transitions. [2022-07-21 01:58:07,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 17 states have internal predecessors, (44), 5 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (11), 7 states have call predecessors, (11), 5 states have call successors, (11) [2022-07-21 01:58:07,374 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 91 transitions. [2022-07-21 01:58:07,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-21 01:58:07,375 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:58:07,375 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:58:07,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-07-21 01:58:07,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 01:58:07,583 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:58:07,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:58:07,583 INFO L85 PathProgramCache]: Analyzing trace with hash -552676772, now seen corresponding path program 1 times [2022-07-21 01:58:07,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:58:07,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [917047354] [2022-07-21 01:58:07,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:58:07,584 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:58:07,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:58:07,585 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 01:58:07,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-21 01:58:07,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:58:07,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 01:58:07,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 01:58:07,714 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-21 01:58:07,714 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 01:58:07,714 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 01:58:07,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [917047354] [2022-07-21 01:58:07,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [917047354] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:58:07,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:58:07,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 01:58:07,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267729493] [2022-07-21 01:58:07,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:58:07,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 01:58:07,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 01:58:07,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 01:58:07,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 01:58:07,715 INFO L87 Difference]: Start difference. First operand 69 states and 91 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-21 01:58:07,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:58:07,734 INFO L93 Difference]: Finished difference Result 96 states and 121 transitions. [2022-07-21 01:58:07,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 01:58:07,735 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 49 [2022-07-21 01:58:07,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:58:07,735 INFO L225 Difference]: With dead ends: 96 [2022-07-21 01:58:07,735 INFO L226 Difference]: Without dead ends: 70 [2022-07-21 01:58:07,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 46 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 01:58:07,736 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 0 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 01:58:07,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 199 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 01:58:07,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-07-21 01:58:07,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2022-07-21 01:58:07,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 49 states have (on average 1.163265306122449) internal successors, (57), 49 states have internal predecessors, (57), 13 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (16), 15 states have call predecessors, (16), 13 states have call successors, (16) [2022-07-21 01:58:07,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 86 transitions. [2022-07-21 01:58:07,738 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 86 transitions. Word has length 49 [2022-07-21 01:58:07,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:58:07,738 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 86 transitions. [2022-07-21 01:58:07,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-21 01:58:07,739 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 86 transitions. [2022-07-21 01:58:07,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-21 01:58:07,739 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:58:07,739 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:58:07,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-21 01:58:07,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 01:58:07,950 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:58:07,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:58:07,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1549749125, now seen corresponding path program 1 times [2022-07-21 01:58:07,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:58:07,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1289681043] [2022-07-21 01:58:07,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:58:07,951 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:58:07,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:58:07,964 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 01:58:07,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-21 01:58:08,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:58:08,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-21 01:58:08,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 01:58:08,603 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-21 01:58:08,603 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 01:58:08,603 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 01:58:08,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1289681043] [2022-07-21 01:58:08,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1289681043] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:58:08,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:58:08,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-21 01:58:08,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156885761] [2022-07-21 01:58:08,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:58:08,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-21 01:58:08,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 01:58:08,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-21 01:58:08,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-07-21 01:58:08,604 INFO L87 Difference]: Start difference. First operand 67 states and 86 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-21 01:58:09,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:58:09,343 INFO L93 Difference]: Finished difference Result 90 states and 116 transitions. [2022-07-21 01:58:09,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 01:58:09,345 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 49 [2022-07-21 01:58:09,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:58:09,345 INFO L225 Difference]: With dead ends: 90 [2022-07-21 01:58:09,345 INFO L226 Difference]: Without dead ends: 69 [2022-07-21 01:58:09,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2022-07-21 01:58:09,346 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 42 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 01:58:09,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 585 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 400 Invalid, 0 Unknown, 36 Unchecked, 0.4s Time] [2022-07-21 01:58:09,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-07-21 01:58:09,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 49. [2022-07-21 01:58:09,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 36 states have internal predecessors, (44), 8 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (10), 10 states have call predecessors, (10), 8 states have call successors, (10) [2022-07-21 01:58:09,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2022-07-21 01:58:09,353 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 49 [2022-07-21 01:58:09,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:58:09,354 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2022-07-21 01:58:09,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 13 states have internal predecessors, (35), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-21 01:58:09,354 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2022-07-21 01:58:09,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-21 01:58:09,354 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:58:09,355 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:58:09,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-07-21 01:58:09,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 01:58:09,563 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:58:09,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:58:09,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1451512262, now seen corresponding path program 1 times [2022-07-21 01:58:09,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:58:09,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1309890866] [2022-07-21 01:58:09,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:58:09,565 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:58:09,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:58:09,566 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 01:58:09,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-21 01:58:09,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:58:09,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-21 01:58:09,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 01:58:10,171 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 27 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-21 01:58:10,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 01:58:11,307 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-21 01:58:11,307 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 01:58:11,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1309890866] [2022-07-21 01:58:11,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1309890866] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 01:58:11,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 01:58:11,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2022-07-21 01:58:11,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082808885] [2022-07-21 01:58:11,307 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 01:58:11,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-21 01:58:11,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 01:58:11,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-21 01:58:11,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-07-21 01:58:11,308 INFO L87 Difference]: Start difference. First operand 49 states and 62 transitions. Second operand has 22 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 4 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-21 01:58:11,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:58:11,869 INFO L93 Difference]: Finished difference Result 88 states and 111 transitions. [2022-07-21 01:58:11,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 01:58:11,870 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 4 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 55 [2022-07-21 01:58:11,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:58:11,870 INFO L225 Difference]: With dead ends: 88 [2022-07-21 01:58:11,870 INFO L226 Difference]: Without dead ends: 55 [2022-07-21 01:58:11,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=161, Invalid=709, Unknown=0, NotChecked=0, Total=870 [2022-07-21 01:58:11,871 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 131 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 01:58:11,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 261 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 307 Invalid, 0 Unknown, 24 Unchecked, 0.3s Time] [2022-07-21 01:58:11,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-21 01:58:11,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2022-07-21 01:58:11,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 8 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2022-07-21 01:58:11,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2022-07-21 01:58:11,873 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 55 [2022-07-21 01:58:11,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:58:11,874 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2022-07-21 01:58:11,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 4 states have call successors, (10), 2 states have call predecessors, (10), 6 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-21 01:58:11,874 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2022-07-21 01:58:11,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-21 01:58:11,874 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:58:11,874 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:58:11,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-07-21 01:58:12,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 01:58:12,082 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:58:12,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:58:12,083 INFO L85 PathProgramCache]: Analyzing trace with hash 2059347801, now seen corresponding path program 1 times [2022-07-21 01:58:12,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:58:12,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1942343103] [2022-07-21 01:58:12,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:58:12,083 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:58:12,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:58:12,085 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 01:58:12,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-07-21 01:58:12,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:58:12,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-21 01:58:12,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 01:58:12,251 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-21 01:58:12,251 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 01:58:12,251 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 01:58:12,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1942343103] [2022-07-21 01:58:12,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1942343103] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:58:12,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:58:12,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 01:58:12,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289888507] [2022-07-21 01:58:12,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:58:12,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 01:58:12,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 01:58:12,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 01:58:12,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-21 01:58:12,252 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-21 01:58:12,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:58:12,373 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2022-07-21 01:58:12,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 01:58:12,373 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 62 [2022-07-21 01:58:12,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:58:12,374 INFO L225 Difference]: With dead ends: 65 [2022-07-21 01:58:12,374 INFO L226 Difference]: Without dead ends: 48 [2022-07-21 01:58:12,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-07-21 01:58:12,374 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 15 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 01:58:12,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 226 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 01:58:12,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-21 01:58:12,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-07-21 01:58:12,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 8 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2022-07-21 01:58:12,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2022-07-21 01:58:12,380 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 62 [2022-07-21 01:58:12,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:58:12,380 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2022-07-21 01:58:12,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.0) internal successors, (35), 6 states have internal predecessors, (35), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-21 01:58:12,380 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2022-07-21 01:58:12,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-21 01:58:12,380 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:58:12,380 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:58:12,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-07-21 01:58:12,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 01:58:12,581 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:58:12,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:58:12,581 INFO L85 PathProgramCache]: Analyzing trace with hash 253909467, now seen corresponding path program 1 times [2022-07-21 01:58:12,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:58:12,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [312223572] [2022-07-21 01:58:12,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:58:12,582 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:58:12,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:58:12,583 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 01:58:12,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-21 01:58:12,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:58:12,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-21 01:58:12,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 01:58:12,776 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 01:58:12,776 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 01:58:12,776 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 01:58:12,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [312223572] [2022-07-21 01:58:12,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [312223572] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:58:12,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:58:12,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-21 01:58:12,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007497061] [2022-07-21 01:58:12,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:58:12,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 01:58:12,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 01:58:12,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 01:58:12,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-07-21 01:58:12,777 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-21 01:58:13,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:58:13,102 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2022-07-21 01:58:13,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 01:58:13,103 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 62 [2022-07-21 01:58:13,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:58:13,103 INFO L225 Difference]: With dead ends: 69 [2022-07-21 01:58:13,103 INFO L226 Difference]: Without dead ends: 50 [2022-07-21 01:58:13,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-07-21 01:58:13,104 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 38 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 01:58:13,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 251 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 01:58:13,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-21 01:58:13,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-07-21 01:58:13,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 37 states have (on average 1.135135135135135) internal successors, (42), 38 states have internal predecessors, (42), 8 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2022-07-21 01:58:13,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2022-07-21 01:58:13,107 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 62 [2022-07-21 01:58:13,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:58:13,107 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2022-07-21 01:58:13,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-21 01:58:13,107 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2022-07-21 01:58:13,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-21 01:58:13,107 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:58:13,107 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:58:13,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-07-21 01:58:13,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 01:58:13,308 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:58:13,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:58:13,309 INFO L85 PathProgramCache]: Analyzing trace with hash 647887735, now seen corresponding path program 1 times [2022-07-21 01:58:13,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:58:13,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [466039740] [2022-07-21 01:58:13,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:58:13,309 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:58:13,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:58:13,310 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 01:58:13,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-07-21 01:58:13,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:58:13,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-21 01:58:13,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 01:58:13,641 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 01:58:13,641 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 01:58:13,641 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 01:58:13,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [466039740] [2022-07-21 01:58:13,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [466039740] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:58:13,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:58:13,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-21 01:58:13,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085659346] [2022-07-21 01:58:13,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:58:13,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 01:58:13,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 01:58:13,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 01:58:13,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-07-21 01:58:13,642 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-21 01:58:13,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:58:13,900 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2022-07-21 01:58:13,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 01:58:13,905 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 63 [2022-07-21 01:58:13,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:58:13,905 INFO L225 Difference]: With dead ends: 71 [2022-07-21 01:58:13,905 INFO L226 Difference]: Without dead ends: 52 [2022-07-21 01:58:13,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-07-21 01:58:13,906 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 35 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 01:58:13,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 257 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 169 Invalid, 0 Unknown, 24 Unchecked, 0.2s Time] [2022-07-21 01:58:13,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-07-21 01:58:13,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2022-07-21 01:58:13,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 37 states have (on average 1.135135135135135) internal successors, (42), 38 states have internal predecessors, (42), 8 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (10), 9 states have call predecessors, (10), 8 states have call successors, (10) [2022-07-21 01:58:13,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2022-07-21 01:58:13,909 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 63 [2022-07-21 01:58:13,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:58:13,911 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2022-07-21 01:58:13,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-21 01:58:13,911 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2022-07-21 01:58:13,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-21 01:58:13,912 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:58:13,912 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:58:13,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-07-21 01:58:14,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 01:58:14,120 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:58:14,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:58:14,120 INFO L85 PathProgramCache]: Analyzing trace with hash -589254976, now seen corresponding path program 1 times [2022-07-21 01:58:14,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:58:14,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1540077787] [2022-07-21 01:58:14,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:58:14,121 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:58:14,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:58:14,122 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 01:58:14,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-07-21 01:58:14,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:58:14,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-21 01:58:14,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 01:58:14,374 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-21 01:58:14,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 01:58:14,628 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-21 01:58:14,629 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 01:58:14,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1540077787] [2022-07-21 01:58:14,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1540077787] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 01:58:14,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 01:58:14,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-07-21 01:58:14,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276478733] [2022-07-21 01:58:14,629 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 01:58:14,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-21 01:58:14,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 01:58:14,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-21 01:58:14,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-07-21 01:58:14,630 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 15 states, 13 states have (on average 4.0) internal successors, (52), 15 states have internal predecessors, (52), 7 states have call successors, (13), 1 states have call predecessors, (13), 2 states have return successors, (13), 5 states have call predecessors, (13), 7 states have call successors, (13) [2022-07-21 01:58:15,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:58:15,105 INFO L93 Difference]: Finished difference Result 84 states and 101 transitions. [2022-07-21 01:58:15,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-21 01:58:15,106 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 4.0) internal successors, (52), 15 states have internal predecessors, (52), 7 states have call successors, (13), 1 states have call predecessors, (13), 2 states have return successors, (13), 5 states have call predecessors, (13), 7 states have call successors, (13) Word has length 63 [2022-07-21 01:58:15,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:58:15,106 INFO L225 Difference]: With dead ends: 84 [2022-07-21 01:58:15,106 INFO L226 Difference]: Without dead ends: 71 [2022-07-21 01:58:15,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-07-21 01:58:15,107 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 72 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 01:58:15,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 519 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 01:58:15,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-07-21 01:58:15,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 54. [2022-07-21 01:58:15,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 41 states have internal predecessors, (44), 9 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (13), 10 states have call predecessors, (13), 9 states have call successors, (13) [2022-07-21 01:58:15,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2022-07-21 01:58:15,110 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 63 [2022-07-21 01:58:15,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:58:15,110 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2022-07-21 01:58:15,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 4.0) internal successors, (52), 15 states have internal predecessors, (52), 7 states have call successors, (13), 1 states have call predecessors, (13), 2 states have return successors, (13), 5 states have call predecessors, (13), 7 states have call successors, (13) [2022-07-21 01:58:15,110 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2022-07-21 01:58:15,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-21 01:58:15,110 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:58:15,110 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:58:15,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-07-21 01:58:15,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 01:58:15,318 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:58:15,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:58:15,319 INFO L85 PathProgramCache]: Analyzing trace with hash -472199073, now seen corresponding path program 1 times [2022-07-21 01:58:15,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:58:15,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [512177899] [2022-07-21 01:58:15,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:58:15,319 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:58:15,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:58:15,320 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 01:58:15,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-07-21 01:58:15,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:58:15,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-21 01:58:15,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 01:58:15,537 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 01:58:15,537 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 01:58:15,537 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 01:58:15,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [512177899] [2022-07-21 01:58:15,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [512177899] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:58:15,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:58:15,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-21 01:58:15,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531164940] [2022-07-21 01:58:15,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:58:15,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 01:58:15,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 01:58:15,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 01:58:15,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-07-21 01:58:15,538 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-21 01:58:15,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:58:15,812 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2022-07-21 01:58:15,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 01:58:15,813 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 64 [2022-07-21 01:58:15,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:58:15,814 INFO L225 Difference]: With dead ends: 75 [2022-07-21 01:58:15,814 INFO L226 Difference]: Without dead ends: 56 [2022-07-21 01:58:15,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-07-21 01:58:15,815 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 34 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 01:58:15,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 257 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 169 Invalid, 0 Unknown, 24 Unchecked, 0.2s Time] [2022-07-21 01:58:15,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-07-21 01:58:15,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2022-07-21 01:58:15,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 41 states have internal predecessors, (44), 9 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (13), 10 states have call predecessors, (13), 9 states have call successors, (13) [2022-07-21 01:58:15,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2022-07-21 01:58:15,820 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 64 [2022-07-21 01:58:15,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:58:15,820 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2022-07-21 01:58:15,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-21 01:58:15,820 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2022-07-21 01:58:15,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-21 01:58:15,821 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:58:15,821 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:58:15,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-07-21 01:58:16,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 01:58:16,031 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:58:16,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:58:16,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1512938488, now seen corresponding path program 1 times [2022-07-21 01:58:16,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:58:16,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1429641135] [2022-07-21 01:58:16,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:58:16,033 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:58:16,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:58:16,034 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 01:58:16,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-07-21 01:58:16,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:58:16,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-21 01:58:16,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 01:58:16,415 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-21 01:58:16,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 01:58:16,530 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-21 01:58:16,531 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 01:58:16,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1429641135] [2022-07-21 01:58:16,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1429641135] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 01:58:16,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-21 01:58:16,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-07-21 01:58:16,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740278071] [2022-07-21 01:58:16,532 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-21 01:58:16,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-21 01:58:16,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 01:58:16,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-21 01:58:16,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-07-21 01:58:16,533 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 13 states have internal predecessors, (50), 6 states have call successors, (13), 1 states have call predecessors, (13), 3 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) [2022-07-21 01:58:16,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:58:16,787 INFO L93 Difference]: Finished difference Result 68 states and 82 transitions. [2022-07-21 01:58:16,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 01:58:16,787 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 13 states have internal predecessors, (50), 6 states have call successors, (13), 1 states have call predecessors, (13), 3 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) Word has length 64 [2022-07-21 01:58:16,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:58:16,788 INFO L225 Difference]: With dead ends: 68 [2022-07-21 01:58:16,788 INFO L226 Difference]: Without dead ends: 55 [2022-07-21 01:58:16,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2022-07-21 01:58:16,789 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 112 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 01:58:16,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 229 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 01:58:16,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-21 01:58:16,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2022-07-21 01:58:16,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 38 states have internal predecessors, (40), 8 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-07-21 01:58:16,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 58 transitions. [2022-07-21 01:58:16,791 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 58 transitions. Word has length 64 [2022-07-21 01:58:16,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:58:16,791 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 58 transitions. [2022-07-21 01:58:16,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 13 states have internal predecessors, (50), 6 states have call successors, (13), 1 states have call predecessors, (13), 3 states have return successors, (14), 7 states have call predecessors, (14), 6 states have call successors, (14) [2022-07-21 01:58:16,791 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 58 transitions. [2022-07-21 01:58:16,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-21 01:58:16,792 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:58:16,792 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:58:16,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-07-21 01:58:16,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 01:58:17,000 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:58:17,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:58:17,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1283662981, now seen corresponding path program 1 times [2022-07-21 01:58:17,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:58:17,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [17723989] [2022-07-21 01:58:17,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:58:17,001 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:58:17,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:58:17,002 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 01:58:17,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-07-21 01:58:17,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:58:17,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-21 01:58:17,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 01:58:17,190 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 01:58:17,190 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 01:58:17,190 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 01:58:17,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [17723989] [2022-07-21 01:58:17,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [17723989] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:58:17,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:58:17,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-21 01:58:17,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036433847] [2022-07-21 01:58:17,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:58:17,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 01:58:17,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 01:58:17,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 01:58:17,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-07-21 01:58:17,191 INFO L87 Difference]: Start difference. First operand 49 states and 58 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-21 01:58:17,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:58:17,513 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2022-07-21 01:58:17,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 01:58:17,514 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 65 [2022-07-21 01:58:17,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:58:17,514 INFO L225 Difference]: With dead ends: 68 [2022-07-21 01:58:17,514 INFO L226 Difference]: Without dead ends: 49 [2022-07-21 01:58:17,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-07-21 01:58:17,515 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 32 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 01:58:17,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 249 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 01:58:17,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-21 01:58:17,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2022-07-21 01:58:17,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 36 states have internal predecessors, (39), 8 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-21 01:58:17,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-07-21 01:58:17,517 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 65 [2022-07-21 01:58:17,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:58:17,517 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-07-21 01:58:17,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-21 01:58:17,517 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-07-21 01:58:17,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-21 01:58:17,517 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 01:58:17,518 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:58:17,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2022-07-21 01:58:17,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 01:58:17,718 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 01:58:17,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 01:58:17,718 INFO L85 PathProgramCache]: Analyzing trace with hash -322048964, now seen corresponding path program 1 times [2022-07-21 01:58:17,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-21 01:58:17,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [800999308] [2022-07-21 01:58:17,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 01:58:17,719 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-21 01:58:17,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-21 01:58:17,720 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-21 01:58:17,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-07-21 01:58:17,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 01:58:17,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 01:58:17,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 01:58:17,818 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-21 01:58:17,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 01:58:17,818 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-21 01:58:17,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [800999308] [2022-07-21 01:58:17,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [800999308] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 01:58:17,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 01:58:17,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-21 01:58:17,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5908854] [2022-07-21 01:58:17,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 01:58:17,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-21 01:58:17,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-21 01:58:17,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-21 01:58:17,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-21 01:58:17,820 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-21 01:58:17,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 01:58:17,832 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2022-07-21 01:58:17,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-21 01:58:17,833 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 65 [2022-07-21 01:58:17,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 01:58:17,833 INFO L225 Difference]: With dead ends: 50 [2022-07-21 01:58:17,833 INFO L226 Difference]: Without dead ends: 0 [2022-07-21 01:58:17,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 62 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 01:58:17,834 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 01:58:17,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 102 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 01:58:17,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-21 01:58:17,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-21 01:58:17,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 01:58:17,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-21 01:58:17,835 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 65 [2022-07-21 01:58:17,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 01:58:17,836 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-21 01:58:17,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-21 01:58:17,836 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-21 01:58:17,836 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-21 01:58:17,838 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2022-07-21 01:58:17,838 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-07-21 01:58:17,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-07-21 01:58:18,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-21 01:58:18,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-07-21 01:58:18,682 INFO L899 garLoopResultBuilder]: For program point isnan_floatFINAL(line 57) no Hoare annotation was computed. [2022-07-21 01:58:18,682 INFO L902 garLoopResultBuilder]: At program point isnan_floatENTRY(line 57) the Hoare annotation is: true [2022-07-21 01:58:18,682 INFO L899 garLoopResultBuilder]: For program point isnan_floatEXIT(line 57) no Hoare annotation was computed. [2022-07-21 01:58:18,682 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 82) no Hoare annotation was computed. [2022-07-21 01:58:18,682 INFO L895 garLoopResultBuilder]: At program point L81(line 81) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_main_~y~0#1|))) (or (and .cse0 (not (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|))) (and (= |ULTIMATE.start_fmax_float_#res#1| |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_~res~0#1| |ULTIMATE.start_main_~x~0#1|) .cse0 (= |ULTIMATE.start_fmax_float_~x#1| |ULTIMATE.start_main_~x~0#1|) (not (fp.eq |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_fmax_float_~y#1|))))) [2022-07-21 01:58:18,682 INFO L899 garLoopResultBuilder]: For program point L81-1(line 81) no Hoare annotation was computed. [2022-07-21 01:58:18,683 INFO L899 garLoopResultBuilder]: For program point L81-2(line 81) no Hoare annotation was computed. [2022-07-21 01:58:18,683 INFO L895 garLoopResultBuilder]: At program point L81-3(line 81) the Hoare annotation is: (and (= |ULTIMATE.start_fmax_float_#res#1| |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_~res~0#1| |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_main_~y~0#1|) (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_fmax_float_~x#1| |ULTIMATE.start_main_~x~0#1|) (not (fp.eq |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_fmax_float_~y#1|))) [2022-07-21 01:58:18,683 INFO L899 garLoopResultBuilder]: For program point L81-4(line 81) no Hoare annotation was computed. [2022-07-21 01:58:18,683 INFO L899 garLoopResultBuilder]: For program point L81-6(lines 81 84) no Hoare annotation was computed. [2022-07-21 01:58:18,683 INFO L902 garLoopResultBuilder]: At program point L69(line 69) the Hoare annotation is: true [2022-07-21 01:58:18,683 INFO L899 garLoopResultBuilder]: For program point L69-1(line 69) no Hoare annotation was computed. [2022-07-21 01:58:18,683 INFO L899 garLoopResultBuilder]: For program point L69-2(line 69) no Hoare annotation was computed. [2022-07-21 01:58:18,683 INFO L895 garLoopResultBuilder]: At program point L69-3(line 69) the Hoare annotation is: (and (= |ULTIMATE.start_main_#t~ret10#1| (_ bv1 32)) |ULTIMATE.start_main_#t~short12#1| (not (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|))) [2022-07-21 01:58:18,683 INFO L899 garLoopResultBuilder]: For program point L69-4(line 69) no Hoare annotation was computed. [2022-07-21 01:58:18,683 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-07-21 01:58:18,683 INFO L899 garLoopResultBuilder]: For program point L69-6(line 69) no Hoare annotation was computed. [2022-07-21 01:58:18,683 INFO L899 garLoopResultBuilder]: For program point L69-7(lines 69 70) no Hoare annotation was computed. [2022-07-21 01:58:18,683 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2022-07-21 01:58:18,683 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-07-21 01:58:18,683 INFO L899 garLoopResultBuilder]: For program point L69-9(lines 69 85) no Hoare annotation was computed. [2022-07-21 01:58:18,683 INFO L899 garLoopResultBuilder]: For program point L69-11(lines 69 85) no Hoare annotation was computed. [2022-07-21 01:58:18,683 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 76) no Hoare annotation was computed. [2022-07-21 01:58:18,683 INFO L899 garLoopResultBuilder]: For program point L53(line 53) no Hoare annotation was computed. [2022-07-21 01:58:18,683 INFO L899 garLoopResultBuilder]: For program point L53-2(line 53) no Hoare annotation was computed. [2022-07-21 01:58:18,683 INFO L895 garLoopResultBuilder]: At program point L53-3(lines 45 54) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_main_~y~0#1|)) (.cse1 (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|))) (or (and .cse0 (not (fp.eq |ULTIMATE.start_fmax_float_~x#1| |ULTIMATE.start_fmax_float_~x#1|)) (not .cse1) (= |ULTIMATE.start_fmax_float_#res#1| |ULTIMATE.start_main_~y~0#1|) (fp.eq |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (and (= |ULTIMATE.start_fmax_float_#res#1| |ULTIMATE.start_main_~x~0#1|) .cse0 .cse1 (= |ULTIMATE.start_fmax_float_~x#1| |ULTIMATE.start_main_~x~0#1|) (not (fp.eq |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_fmax_float_~y#1|))))) [2022-07-21 01:58:18,683 INFO L899 garLoopResultBuilder]: For program point L82(line 82) no Hoare annotation was computed. [2022-07-21 01:58:18,683 INFO L895 garLoopResultBuilder]: At program point L70(line 70) the Hoare annotation is: (let ((.cse0 (not |ULTIMATE.start_main_#t~short12#1|)) (.cse1 (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|)) (.cse2 (not |ULTIMATE.start_main_#t~short16#1|))) (or (and .cse0 (= |ULTIMATE.start_main_#t~ret10#1| (_ bv1 32)) (= |ULTIMATE.start_main_#t~ret11#1| (_ bv1 32)) (not (fp.eq |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (not .cse1) .cse2) (and .cse0 (= |ULTIMATE.start_main_#t~ret10#1| (_ bv0 32)) .cse1 .cse2))) [2022-07-21 01:58:18,683 INFO L899 garLoopResultBuilder]: For program point L70-1(line 70) no Hoare annotation was computed. [2022-07-21 01:58:18,683 INFO L899 garLoopResultBuilder]: For program point L70-2(line 70) no Hoare annotation was computed. [2022-07-21 01:58:18,684 INFO L895 garLoopResultBuilder]: At program point L70-3(line 70) the Hoare annotation is: (and (not |ULTIMATE.start_main_#t~short12#1|) |ULTIMATE.start_main_#t~short15#1| (= |ULTIMATE.start_main_#t~ret13#1| (_ bv0 32)) (= |ULTIMATE.start_main_#t~ret10#1| (_ bv0 32)) (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|) (not |ULTIMATE.start_main_#t~short16#1|)) [2022-07-21 01:58:18,684 INFO L899 garLoopResultBuilder]: For program point L70-4(line 70) no Hoare annotation was computed. [2022-07-21 01:58:18,684 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-07-21 01:58:18,684 INFO L899 garLoopResultBuilder]: For program point L70-6(line 70) no Hoare annotation was computed. [2022-07-21 01:58:18,684 INFO L902 garLoopResultBuilder]: At program point L87(lines 59 88) the Hoare annotation is: true [2022-07-21 01:58:18,684 INFO L895 garLoopResultBuilder]: At program point L50(line 50) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_main_~y~0#1|)) (.cse1 (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|)) (.cse2 (fp.eq |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_fmax_float_~y#1|))) (or (and .cse0 (not (fp.eq |ULTIMATE.start_fmax_float_~x#1| |ULTIMATE.start_fmax_float_~x#1|)) (not .cse1) .cse2) (and .cse0 .cse1 (= |ULTIMATE.start_fmax_float_~x#1| |ULTIMATE.start_main_~x~0#1|) (not .cse2)))) [2022-07-21 01:58:18,684 INFO L899 garLoopResultBuilder]: For program point L50-1(lines 50 52) no Hoare annotation was computed. [2022-07-21 01:58:18,684 INFO L895 garLoopResultBuilder]: At program point L46(line 46) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_main_~y~0#1|)) (.cse1 (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|)) (.cse2 (fp.eq |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_fmax_float_~y#1|))) (or (and .cse0 (not (fp.eq |ULTIMATE.start_fmax_float_~x#1| |ULTIMATE.start_fmax_float_~x#1|)) (not .cse1) .cse2) (and .cse0 .cse1 (= |ULTIMATE.start_fmax_float_~x#1| |ULTIMATE.start_main_~x~0#1|) (not .cse2)))) [2022-07-21 01:58:18,684 INFO L899 garLoopResultBuilder]: For program point L46-1(lines 46 48) no Hoare annotation was computed. [2022-07-21 01:58:18,684 INFO L895 garLoopResultBuilder]: At program point L75(line 75) the Hoare annotation is: (let ((.cse0 (= |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_main_~y~0#1|)) (.cse1 (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|))) (or (and (= |ULTIMATE.start_fmax_float_#res#1| |ULTIMATE.start_main_~x~0#1|) (= |ULTIMATE.start_main_~res~0#1| |ULTIMATE.start_main_~x~0#1|) .cse0 .cse1 (= |ULTIMATE.start_fmax_float_~x#1| |ULTIMATE.start_main_~x~0#1|) (not (fp.eq |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_fmax_float_~y#1|))) (and .cse0 (not (fp.eq |ULTIMATE.start_fmax_float_~x#1| |ULTIMATE.start_fmax_float_~x#1|)) (= |ULTIMATE.start_main_~res~0#1| |ULTIMATE.start_main_~y~0#1|) (not .cse1) (= |ULTIMATE.start_fmax_float_#res#1| |ULTIMATE.start_main_~y~0#1|) (fp.eq |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)))) [2022-07-21 01:58:18,684 INFO L899 garLoopResultBuilder]: For program point L75-1(line 75) no Hoare annotation was computed. [2022-07-21 01:58:18,684 INFO L899 garLoopResultBuilder]: For program point L75-2(line 75) no Hoare annotation was computed. [2022-07-21 01:58:18,684 INFO L895 garLoopResultBuilder]: At program point L75-3(line 75) the Hoare annotation is: (and |ULTIMATE.start_main_#t~short20#1| (= |ULTIMATE.start_fmax_float_~y#1| |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start_main_~res~0#1| |ULTIMATE.start_main_~y~0#1|) (not (fp.eq |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~x~0#1|)) (= |ULTIMATE.start_fmax_float_#res#1| |ULTIMATE.start_main_~y~0#1|) (fp.eq |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) [2022-07-21 01:58:18,684 INFO L899 garLoopResultBuilder]: For program point L75-4(line 75) no Hoare annotation was computed. [2022-07-21 01:58:18,684 INFO L899 garLoopResultBuilder]: For program point L75-6(lines 75 78) no Hoare annotation was computed. [2022-07-21 01:58:18,684 INFO L899 garLoopResultBuilder]: For program point L76(line 76) no Hoare annotation was computed. [2022-07-21 01:58:18,684 INFO L899 garLoopResultBuilder]: For program point L33(lines 33 42) no Hoare annotation was computed. [2022-07-21 01:58:18,684 INFO L899 garLoopResultBuilder]: For program point __fpclassify_floatFINAL(lines 22 43) no Hoare annotation was computed. [2022-07-21 01:58:18,684 INFO L899 garLoopResultBuilder]: For program point L25-1(lines 25 29) no Hoare annotation was computed. [2022-07-21 01:58:18,684 INFO L895 garLoopResultBuilder]: At program point L25-2(lines 25 29) the Hoare annotation is: (= |__fpclassify_float_#in~x| __fpclassify_float_~x) [2022-07-21 01:58:18,684 INFO L899 garLoopResultBuilder]: For program point L25-3(lines 22 43) no Hoare annotation was computed. [2022-07-21 01:58:18,684 INFO L899 garLoopResultBuilder]: For program point L36(lines 36 42) no Hoare annotation was computed. [2022-07-21 01:58:18,684 INFO L902 garLoopResultBuilder]: At program point __fpclassify_floatENTRY(lines 22 43) the Hoare annotation is: true [2022-07-21 01:58:18,684 INFO L899 garLoopResultBuilder]: For program point __fpclassify_floatEXIT(lines 22 43) no Hoare annotation was computed. [2022-07-21 01:58:18,684 INFO L899 garLoopResultBuilder]: For program point L39(lines 39 42) no Hoare annotation was computed. [2022-07-21 01:58:18,687 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 01:58:18,690 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-21 01:58:18,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:58:18 BoogieIcfgContainer [2022-07-21 01:58:18,715 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-21 01:58:18,716 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-21 01:58:18,716 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-21 01:58:18,716 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-21 01:58:18,716 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:57:54" (3/4) ... [2022-07-21 01:58:18,718 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-07-21 01:58:18,722 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure isnan_float [2022-07-21 01:58:18,722 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __fpclassify_float [2022-07-21 01:58:18,743 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 18 nodes and edges [2022-07-21 01:58:18,743 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2022-07-21 01:58:18,743 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-07-21 01:58:18,744 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-07-21 01:58:18,776 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: \old(x) == x [2022-07-21 01:58:18,777 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((y == y && !~fp.eq~FLOAT(x, x)) && !~fp.eq~FLOAT(x, x)) && \result == y) && ~fp.eq~FLOAT(y, y)) || ((((\result == x && y == y) && ~fp.eq~FLOAT(x, x)) && x == x) && !~fp.eq~FLOAT(y, y)) [2022-07-21 01:58:18,795 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-21 01:58:18,795 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-21 01:58:18,796 INFO L158 Benchmark]: Toolchain (without parser) took 24891.01ms. Allocated memory was 58.7MB in the beginning and 117.4MB in the end (delta: 58.7MB). Free memory was 37.6MB in the beginning and 79.1MB in the end (delta: -41.5MB). Peak memory consumption was 15.6MB. Max. memory is 16.1GB. [2022-07-21 01:58:18,796 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 58.7MB. Free memory was 40.8MB in the beginning and 40.8MB in the end (delta: 43.7kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 01:58:18,797 INFO L158 Benchmark]: CACSL2BoogieTranslator took 202.45ms. Allocated memory is still 58.7MB. Free memory was 37.4MB in the beginning and 40.8MB in the end (delta: -3.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-21 01:58:18,800 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.95ms. Allocated memory is still 58.7MB. Free memory was 40.8MB in the beginning and 39.1MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-21 01:58:18,800 INFO L158 Benchmark]: Boogie Preprocessor took 49.36ms. Allocated memory is still 58.7MB. Free memory was 39.1MB in the beginning and 37.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-21 01:58:18,800 INFO L158 Benchmark]: RCFGBuilder took 421.62ms. Allocated memory was 58.7MB in the beginning and 83.9MB in the end (delta: 25.2MB). Free memory was 37.6MB in the beginning and 64.7MB in the end (delta: -27.1MB). Peak memory consumption was 16.3MB. Max. memory is 16.1GB. [2022-07-21 01:58:18,805 INFO L158 Benchmark]: TraceAbstraction took 24086.87ms. Allocated memory was 83.9MB in the beginning and 117.4MB in the end (delta: 33.6MB). Free memory was 64.0MB in the beginning and 83.3MB in the end (delta: -19.3MB). Peak memory consumption was 67.8MB. Max. memory is 16.1GB. [2022-07-21 01:58:18,805 INFO L158 Benchmark]: Witness Printer took 79.90ms. Allocated memory is still 117.4MB. Free memory was 82.2MB in the beginning and 79.1MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-21 01:58:18,807 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 58.7MB. Free memory was 40.8MB in the beginning and 40.8MB in the end (delta: 43.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 202.45ms. Allocated memory is still 58.7MB. Free memory was 37.4MB in the beginning and 40.8MB in the end (delta: -3.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 44.95ms. Allocated memory is still 58.7MB. Free memory was 40.8MB in the beginning and 39.1MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 49.36ms. Allocated memory is still 58.7MB. Free memory was 39.1MB in the beginning and 37.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 421.62ms. Allocated memory was 58.7MB in the beginning and 83.9MB in the end (delta: 25.2MB). Free memory was 37.6MB in the beginning and 64.7MB in the end (delta: -27.1MB). Peak memory consumption was 16.3MB. Max. memory is 16.1GB. * TraceAbstraction took 24086.87ms. Allocated memory was 83.9MB in the beginning and 117.4MB in the end (delta: 33.6MB). Free memory was 64.0MB in the beginning and 83.3MB in the end (delta: -19.3MB). Peak memory consumption was 67.8MB. Max. memory is 16.1GB. * Witness Printer took 79.90ms. Allocated memory is still 117.4MB. Free memory was 82.2MB in the beginning and 79.1MB in the end (delta: 3.1MB). 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 - PositiveResult [Line: 76]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 82]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 55 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 24.0s, OverallIterations: 30, TraceHistogramMax: 6, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 7.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1332 SdHoareTripleChecker+Valid, 5.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1257 mSDsluCounter, 9173 SdHoareTripleChecker+Invalid, 4.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 108 IncrementalHoareTripleChecker+Unchecked, 7355 mSDsCounter, 334 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4147 IncrementalHoareTripleChecker+Invalid, 4589 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 334 mSolverCounterUnsat, 1818 mSDtfsCounter, 4147 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2044 GetRequests, 1738 SyntacticMatches, 2 SemanticMatches, 304 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 4.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=100occurred in iteration=14, InterpolantAutomatonStates: 243, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 30 MinimizatonAttempts, 209 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 15 LocationsWithAnnotation, 137 PreInvPairs, 163 NumberOfFragments, 264 HoareAnnotationTreeSize, 137 FomulaSimplifications, 1064 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 15 FomulaSimplificationsInter, 1513 FormulaSimplificationTreeSizeReductionInter, 0.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 7.1s InterpolantComputationTime, 1490 NumberOfCodeBlocks, 1490 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 1902 ConstructedInterpolants, 9 QuantifiedInterpolants, 5667 SizeOfPredicates, 152 NumberOfNonLiveVariables, 3436 ConjunctsInSsa, 301 ConjunctsInUnsatCore, 40 InterpolantComputations, 20 PerfectInterpolantSequences, 1033/1145 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 - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 45]: Loop Invariant Derived loop invariant: ((((y == y && !~fp.eq~FLOAT(x, x)) && !~fp.eq~FLOAT(x, x)) && \result == y) && ~fp.eq~FLOAT(y, y)) || ((((\result == x && y == y) && ~fp.eq~FLOAT(x, x)) && x == x) && !~fp.eq~FLOAT(y, y)) - InvariantResult [Line: 59]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: \old(x) == x RESULT: Ultimate proved your program to be correct! [2022-07-21 01:58:18,844 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 Result: TRUE