./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem19_label19.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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/eca-rers2012/Problem19_label19.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 497507965304fa3958b4d8590ba6d10980c500d31bff8080fc78d47954487eca --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 12:54:26,694 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 12:54:26,720 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 12:54:26,748 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 12:54:26,748 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 12:54:26,749 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 12:54:26,750 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 12:54:26,751 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 12:54:26,752 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 12:54:26,753 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 12:54:26,754 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 12:54:26,754 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 12:54:26,755 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 12:54:26,755 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 12:54:26,756 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 12:54:26,757 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 12:54:26,758 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 12:54:26,758 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 12:54:26,759 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 12:54:26,761 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 12:54:26,762 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 12:54:26,765 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 12:54:26,767 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 12:54:26,769 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 12:54:26,771 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 12:54:26,775 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 12:54:26,775 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 12:54:26,776 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 12:54:26,777 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 12:54:26,777 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 12:54:26,778 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 12:54:26,778 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 12:54:26,779 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 12:54:26,780 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 12:54:26,781 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 12:54:26,781 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 12:54:26,782 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 12:54:26,782 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 12:54:26,782 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 12:54:26,783 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 12:54:26,785 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 12:54:26,785 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 12:54:26,805 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 12:54:26,815 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 12:54:26,815 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 12:54:26,815 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 12:54:26,816 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 12:54:26,816 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 12:54:26,816 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 12:54:26,817 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 12:54:26,817 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 12:54:26,817 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 12:54:26,817 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 12:54:26,817 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 12:54:26,817 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 12:54:26,817 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 12:54:26,817 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 12:54:26,817 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 12:54:26,817 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 12:54:26,817 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 12:54:26,817 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 12:54:26,818 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 12:54:26,818 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 12:54:26,818 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 12:54:26,818 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 12:54:26,818 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 12:54:26,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 12:54:26,818 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 12:54:26,818 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 12:54:26,818 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 12:54:26,818 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 12:54:26,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 12:54:26,819 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 12:54:26,819 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 12:54:26,819 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 12:54:26,819 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 12:54:26,819 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 497507965304fa3958b4d8590ba6d10980c500d31bff8080fc78d47954487eca [2021-12-14 12:54:26,992 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 12:54:27,007 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 12:54:27,008 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 12:54:27,009 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 12:54:27,010 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 12:54:27,010 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label19.c [2021-12-14 12:54:27,047 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36dbc8b54/b9b4f78986434dfc9c1222d57754ef13/FLAGf862d9cdb [2021-12-14 12:54:27,689 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 12:54:27,690 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label19.c [2021-12-14 12:54:27,717 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36dbc8b54/b9b4f78986434dfc9c1222d57754ef13/FLAGf862d9cdb [2021-12-14 12:54:28,080 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36dbc8b54/b9b4f78986434dfc9c1222d57754ef13 [2021-12-14 12:54:28,082 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 12:54:28,083 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 12:54:28,083 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 12:54:28,083 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 12:54:28,086 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 12:54:28,086 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:54:28" (1/1) ... [2021-12-14 12:54:28,087 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@570fe4bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:54:28, skipping insertion in model container [2021-12-14 12:54:28,087 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:54:28" (1/1) ... [2021-12-14 12:54:28,091 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 12:54:28,222 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 12:54:28,491 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/eca-rers2012/Problem19_label19.c[3491,3504] [2021-12-14 12:54:29,322 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 12:54:29,328 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 12:54:29,362 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/eca-rers2012/Problem19_label19.c[3491,3504] [2021-12-14 12:54:30,041 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 12:54:30,070 INFO L208 MainTranslator]: Completed translation [2021-12-14 12:54:30,083 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:54:30 WrapperNode [2021-12-14 12:54:30,083 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 12:54:30,084 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 12:54:30,085 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 12:54:30,085 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 12:54:30,106 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:54:30" (1/1) ... [2021-12-14 12:54:30,185 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:54:30" (1/1) ... [2021-12-14 12:54:30,984 INFO L137 Inliner]: procedures = 19, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 9425 [2021-12-14 12:54:30,984 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 12:54:30,985 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 12:54:30,985 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 12:54:30,985 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 12:54:30,991 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:54:30" (1/1) ... [2021-12-14 12:54:30,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:54:30" (1/1) ... [2021-12-14 12:54:31,135 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:54:30" (1/1) ... [2021-12-14 12:54:31,135 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:54:30" (1/1) ... [2021-12-14 12:54:31,511 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:54:30" (1/1) ... [2021-12-14 12:54:31,533 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:54:30" (1/1) ... [2021-12-14 12:54:31,609 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:54:30" (1/1) ... [2021-12-14 12:54:31,863 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 12:54:31,880 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 12:54:31,880 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 12:54:31,880 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 12:54:31,896 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:54:30" (1/1) ... [2021-12-14 12:54:31,908 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 12:54:31,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 12:54:31,956 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) [2021-12-14 12:54:32,017 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 [2021-12-14 12:54:32,026 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 12:54:32,026 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 12:54:32,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 12:54:32,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 12:54:32,086 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 12:54:32,087 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 12:54:37,230 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 12:54:37,253 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 12:54:37,254 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-14 12:54:37,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:54:37 BoogieIcfgContainer [2021-12-14 12:54:37,258 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 12:54:37,260 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 12:54:37,260 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 12:54:37,263 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 12:54:37,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 12:54:28" (1/3) ... [2021-12-14 12:54:37,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52f8fb43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:54:37, skipping insertion in model container [2021-12-14 12:54:37,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:54:30" (2/3) ... [2021-12-14 12:54:37,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52f8fb43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:54:37, skipping insertion in model container [2021-12-14 12:54:37,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:54:37" (3/3) ... [2021-12-14 12:54:37,266 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label19.c [2021-12-14 12:54:37,270 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 12:54:37,271 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 12:54:37,324 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 12:54:37,330 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 12:54:37,331 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 12:54:37,362 INFO L276 IsEmpty]: Start isEmpty. Operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 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) [2021-12-14 12:54:37,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-14 12:54:37,372 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:54:37,372 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:54:37,373 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:54:37,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:54:37,376 INFO L85 PathProgramCache]: Analyzing trace with hash -593706766, now seen corresponding path program 1 times [2021-12-14 12:54:37,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:54:37,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337824812] [2021-12-14 12:54:37,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:54:37,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:54:37,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:54:37,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 12:54:37,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:54:37,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337824812] [2021-12-14 12:54:37,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337824812] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:54:37,563 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:54:37,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 12:54:37,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647858118] [2021-12-14 12:54:37,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:54:37,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:54:37,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:54:37,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:54:37,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:54:37,606 INFO L87 Difference]: Start difference. First operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 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) Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 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) [2021-12-14 12:54:43,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:54:43,086 INFO L93 Difference]: Finished difference Result 4919 states and 9313 transitions. [2021-12-14 12:54:43,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:54:43,088 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 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) Word has length 24 [2021-12-14 12:54:43,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:54:43,119 INFO L225 Difference]: With dead ends: 4919 [2021-12-14 12:54:43,119 INFO L226 Difference]: Without dead ends: 3107 [2021-12-14 12:54:43,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:54:43,131 INFO L933 BasicCegarLoop]: 1276 mSDtfsCounter, 1529 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 4638 mSolverCounterSat, 1110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1529 SdHoareTripleChecker+Valid, 1457 SdHoareTripleChecker+Invalid, 5748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1110 IncrementalHoareTripleChecker+Valid, 4638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-12-14 12:54:43,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1529 Valid, 1457 Invalid, 5748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1110 Valid, 4638 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2021-12-14 12:54:43,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3107 states. [2021-12-14 12:54:43,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3107 to 3106. [2021-12-14 12:54:43,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3106 states, 3105 states have (on average 1.652818035426731) internal successors, (5132), 3105 states have internal predecessors, (5132), 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) [2021-12-14 12:54:43,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3106 states to 3106 states and 5132 transitions. [2021-12-14 12:54:43,238 INFO L78 Accepts]: Start accepts. Automaton has 3106 states and 5132 transitions. Word has length 24 [2021-12-14 12:54:43,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:54:43,238 INFO L470 AbstractCegarLoop]: Abstraction has 3106 states and 5132 transitions. [2021-12-14 12:54:43,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 2 states have internal predecessors, (24), 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) [2021-12-14 12:54:43,239 INFO L276 IsEmpty]: Start isEmpty. Operand 3106 states and 5132 transitions. [2021-12-14 12:54:43,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-14 12:54:43,242 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:54:43,242 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:54:43,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 12:54:43,243 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:54:43,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:54:43,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1090988298, now seen corresponding path program 1 times [2021-12-14 12:54:43,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:54:43,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148044060] [2021-12-14 12:54:43,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:54:43,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:54:43,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:54:43,432 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 12:54:43,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:54:43,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148044060] [2021-12-14 12:54:43,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148044060] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:54:43,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:54:43,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 12:54:43,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697279395] [2021-12-14 12:54:43,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:54:43,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 12:54:43,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:54:43,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 12:54:43,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 12:54:43,438 INFO L87 Difference]: Start difference. First operand 3106 states and 5132 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 3 states have internal predecessors, (93), 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) [2021-12-14 12:54:53,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:54:53,683 INFO L93 Difference]: Finished difference Result 10391 states and 16943 transitions. [2021-12-14 12:54:53,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 12:54:53,684 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 3 states have internal predecessors, (93), 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) Word has length 93 [2021-12-14 12:54:53,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:54:53,720 INFO L225 Difference]: With dead ends: 10391 [2021-12-14 12:54:53,720 INFO L226 Difference]: Without dead ends: 7287 [2021-12-14 12:54:53,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 12:54:53,728 INFO L933 BasicCegarLoop]: 1842 mSDtfsCounter, 4206 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 11121 mSolverCounterSat, 1406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4206 SdHoareTripleChecker+Valid, 2105 SdHoareTripleChecker+Invalid, 12527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1406 IncrementalHoareTripleChecker+Valid, 11121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2021-12-14 12:54:53,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4206 Valid, 2105 Invalid, 12527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1406 Valid, 11121 Invalid, 0 Unknown, 0 Unchecked, 10.0s Time] [2021-12-14 12:54:53,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7287 states. [2021-12-14 12:54:53,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7287 to 7236. [2021-12-14 12:54:53,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7236 states, 7235 states have (on average 1.5213545266067727) internal successors, (11007), 7235 states have internal predecessors, (11007), 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) [2021-12-14 12:54:53,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7236 states to 7236 states and 11007 transitions. [2021-12-14 12:54:53,847 INFO L78 Accepts]: Start accepts. Automaton has 7236 states and 11007 transitions. Word has length 93 [2021-12-14 12:54:53,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:54:53,848 INFO L470 AbstractCegarLoop]: Abstraction has 7236 states and 11007 transitions. [2021-12-14 12:54:53,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 3 states have internal predecessors, (93), 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) [2021-12-14 12:54:53,849 INFO L276 IsEmpty]: Start isEmpty. Operand 7236 states and 11007 transitions. [2021-12-14 12:54:53,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-12-14 12:54:53,852 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:54:53,852 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:54:53,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 12:54:53,853 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:54:53,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:54:53,853 INFO L85 PathProgramCache]: Analyzing trace with hash -366703381, now seen corresponding path program 1 times [2021-12-14 12:54:53,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:54:53,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765785268] [2021-12-14 12:54:53,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:54:53,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:54:53,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:54:54,028 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 12:54:54,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:54:54,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765785268] [2021-12-14 12:54:54,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765785268] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:54:54,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:54:54,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 12:54:54,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785420545] [2021-12-14 12:54:54,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:54:54,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:54:54,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:54:54,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:54:54,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:54:54,030 INFO L87 Difference]: Start difference. First operand 7236 states and 11007 transitions. Second operand has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 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) [2021-12-14 12:54:59,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:54:59,108 INFO L93 Difference]: Finished difference Result 15858 states and 25893 transitions. [2021-12-14 12:54:59,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:54:59,108 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 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) Word has length 259 [2021-12-14 12:54:59,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:54:59,152 INFO L225 Difference]: With dead ends: 15858 [2021-12-14 12:54:59,167 INFO L226 Difference]: Without dead ends: 9989 [2021-12-14 12:54:59,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:54:59,186 INFO L933 BasicCegarLoop]: 2905 mSDtfsCounter, 1587 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 3684 mSolverCounterSat, 1906 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1587 SdHoareTripleChecker+Valid, 3095 SdHoareTripleChecker+Invalid, 5590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1906 IncrementalHoareTripleChecker+Valid, 3684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-12-14 12:54:59,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1587 Valid, 3095 Invalid, 5590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1906 Valid, 3684 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2021-12-14 12:54:59,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9989 states. [2021-12-14 12:54:59,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9989 to 9987. [2021-12-14 12:54:59,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9987 states, 9986 states have (on average 1.426096535149209) internal successors, (14241), 9986 states have internal predecessors, (14241), 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) [2021-12-14 12:54:59,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9987 states to 9987 states and 14241 transitions. [2021-12-14 12:54:59,310 INFO L78 Accepts]: Start accepts. Automaton has 9987 states and 14241 transitions. Word has length 259 [2021-12-14 12:54:59,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:54:59,312 INFO L470 AbstractCegarLoop]: Abstraction has 9987 states and 14241 transitions. [2021-12-14 12:54:59,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 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) [2021-12-14 12:54:59,312 INFO L276 IsEmpty]: Start isEmpty. Operand 9987 states and 14241 transitions. [2021-12-14 12:54:59,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2021-12-14 12:54:59,318 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:54:59,318 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:54:59,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 12:54:59,319 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:54:59,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:54:59,319 INFO L85 PathProgramCache]: Analyzing trace with hash -509510883, now seen corresponding path program 1 times [2021-12-14 12:54:59,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:54:59,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647378411] [2021-12-14 12:54:59,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:54:59,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:54:59,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:54:59,535 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 12:54:59,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:54:59,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647378411] [2021-12-14 12:54:59,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647378411] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:54:59,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:54:59,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 12:54:59,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660897422] [2021-12-14 12:54:59,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:54:59,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 12:54:59,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:54:59,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 12:54:59,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 12:54:59,538 INFO L87 Difference]: Start difference. First operand 9987 states and 14241 transitions. Second operand has 4 states, 4 states have (on average 81.5) internal successors, (326), 3 states have internal predecessors, (326), 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) [2021-12-14 12:55:05,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:55:05,488 INFO L93 Difference]: Finished difference Result 18638 states and 27134 transitions. [2021-12-14 12:55:05,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 12:55:05,488 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 81.5) internal successors, (326), 3 states have internal predecessors, (326), 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) Word has length 326 [2021-12-14 12:55:05,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:55:05,526 INFO L225 Difference]: With dead ends: 18638 [2021-12-14 12:55:05,527 INFO L226 Difference]: Without dead ends: 9987 [2021-12-14 12:55:05,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 12:55:05,553 INFO L933 BasicCegarLoop]: 1764 mSDtfsCounter, 1140 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 7313 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1140 SdHoareTripleChecker+Valid, 2106 SdHoareTripleChecker+Invalid, 7321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 7313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-12-14 12:55:05,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1140 Valid, 2106 Invalid, 7321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 7313 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2021-12-14 12:55:05,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9987 states. [2021-12-14 12:55:05,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9987 to 9987. [2021-12-14 12:55:05,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9987 states, 9986 states have (on average 1.4251952733827358) internal successors, (14232), 9986 states have internal predecessors, (14232), 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) [2021-12-14 12:55:05,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9987 states to 9987 states and 14232 transitions. [2021-12-14 12:55:05,674 INFO L78 Accepts]: Start accepts. Automaton has 9987 states and 14232 transitions. Word has length 326 [2021-12-14 12:55:05,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:55:05,674 INFO L470 AbstractCegarLoop]: Abstraction has 9987 states and 14232 transitions. [2021-12-14 12:55:05,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.5) internal successors, (326), 3 states have internal predecessors, (326), 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) [2021-12-14 12:55:05,675 INFO L276 IsEmpty]: Start isEmpty. Operand 9987 states and 14232 transitions. [2021-12-14 12:55:05,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 588 [2021-12-14 12:55:05,681 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:55:05,681 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:55:05,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 12:55:05,682 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:55:05,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:55:05,682 INFO L85 PathProgramCache]: Analyzing trace with hash -893427766, now seen corresponding path program 1 times [2021-12-14 12:55:05,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:55:05,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613745950] [2021-12-14 12:55:05,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:55:05,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:55:05,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:55:05,933 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-14 12:55:05,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:55:05,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613745950] [2021-12-14 12:55:05,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613745950] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:55:05,934 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:55:05,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 12:55:05,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429572197] [2021-12-14 12:55:05,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:55:05,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:55:05,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:55:05,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:55:05,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:55:05,938 INFO L87 Difference]: Start difference. First operand 9987 states and 14232 transitions. Second operand has 3 states, 3 states have (on average 168.0) internal successors, (504), 2 states have internal predecessors, (504), 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) [2021-12-14 12:55:10,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:55:10,287 INFO L93 Difference]: Finished difference Result 21345 states and 30939 transitions. [2021-12-14 12:55:10,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:55:10,304 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 168.0) internal successors, (504), 2 states have internal predecessors, (504), 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) Word has length 587 [2021-12-14 12:55:10,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:55:10,333 INFO L225 Difference]: With dead ends: 21345 [2021-12-14 12:55:10,345 INFO L226 Difference]: Without dead ends: 12725 [2021-12-14 12:55:10,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:55:10,361 INFO L933 BasicCegarLoop]: 704 mSDtfsCounter, 1395 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 3925 mSolverCounterSat, 1669 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1395 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 5594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1669 IncrementalHoareTripleChecker+Valid, 3925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-12-14 12:55:10,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1395 Valid, 754 Invalid, 5594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1669 Valid, 3925 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-12-14 12:55:10,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12725 states. [2021-12-14 12:55:10,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12725 to 12721. [2021-12-14 12:55:10,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12721 states, 12720 states have (on average 1.3437106918238995) internal successors, (17092), 12720 states have internal predecessors, (17092), 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) [2021-12-14 12:55:10,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12721 states to 12721 states and 17092 transitions. [2021-12-14 12:55:10,632 INFO L78 Accepts]: Start accepts. Automaton has 12721 states and 17092 transitions. Word has length 587 [2021-12-14 12:55:10,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:55:10,634 INFO L470 AbstractCegarLoop]: Abstraction has 12721 states and 17092 transitions. [2021-12-14 12:55:10,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.0) internal successors, (504), 2 states have internal predecessors, (504), 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) [2021-12-14 12:55:10,637 INFO L276 IsEmpty]: Start isEmpty. Operand 12721 states and 17092 transitions. [2021-12-14 12:55:10,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 647 [2021-12-14 12:55:10,645 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:55:10,645 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:55:10,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 12:55:10,646 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:55:10,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:55:10,647 INFO L85 PathProgramCache]: Analyzing trace with hash -848627556, now seen corresponding path program 1 times [2021-12-14 12:55:10,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:55:10,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615220519] [2021-12-14 12:55:10,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:55:10,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:55:10,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:55:10,836 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 172 proven. 0 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2021-12-14 12:55:10,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:55:10,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615220519] [2021-12-14 12:55:10,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615220519] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:55:10,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:55:10,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 12:55:10,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980838525] [2021-12-14 12:55:10,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:55:10,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:55:10,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:55:10,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:55:10,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:55:10,838 INFO L87 Difference]: Start difference. First operand 12721 states and 17092 transitions. Second operand has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 2 states have internal predecessors, (550), 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) [2021-12-14 12:55:16,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:55:16,528 INFO L93 Difference]: Finished difference Result 35169 states and 48194 transitions. [2021-12-14 12:55:16,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:55:16,529 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 2 states have internal predecessors, (550), 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) Word has length 646 [2021-12-14 12:55:16,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:55:16,595 INFO L225 Difference]: With dead ends: 35169 [2021-12-14 12:55:16,610 INFO L226 Difference]: Without dead ends: 23815 [2021-12-14 12:55:16,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:55:16,641 INFO L933 BasicCegarLoop]: 711 mSDtfsCounter, 2119 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 5111 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2119 SdHoareTripleChecker+Valid, 980 SdHoareTripleChecker+Invalid, 5545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 5111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-12-14 12:55:16,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2119 Valid, 980 Invalid, 5545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [434 Valid, 5111 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2021-12-14 12:55:16,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23815 states. [2021-12-14 12:55:17,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23815 to 23813. [2021-12-14 12:55:17,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23813 states, 23812 states have (on average 1.3270199899210482) internal successors, (31599), 23812 states have internal predecessors, (31599), 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) [2021-12-14 12:55:17,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23813 states to 23813 states and 31599 transitions. [2021-12-14 12:55:17,117 INFO L78 Accepts]: Start accepts. Automaton has 23813 states and 31599 transitions. Word has length 646 [2021-12-14 12:55:17,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:55:17,117 INFO L470 AbstractCegarLoop]: Abstraction has 23813 states and 31599 transitions. [2021-12-14 12:55:17,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 2 states have internal predecessors, (550), 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) [2021-12-14 12:55:17,118 INFO L276 IsEmpty]: Start isEmpty. Operand 23813 states and 31599 transitions. [2021-12-14 12:55:17,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 661 [2021-12-14 12:55:17,139 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:55:17,139 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:55:17,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 12:55:17,140 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:55:17,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:55:17,140 INFO L85 PathProgramCache]: Analyzing trace with hash 558703373, now seen corresponding path program 1 times [2021-12-14 12:55:17,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:55:17,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934042084] [2021-12-14 12:55:17,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:55:17,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:55:17,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:55:17,798 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 172 proven. 90 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-14 12:55:17,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:55:17,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934042084] [2021-12-14 12:55:17,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934042084] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 12:55:17,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265870722] [2021-12-14 12:55:17,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:55:17,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 12:55:17,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 12:55:17,800 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 12:55:17,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 12:55:17,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:55:17,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 806 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 12:55:17,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 12:55:18,750 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 194 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-14 12:55:18,751 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 12:55:18,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265870722] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:55:18,751 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 12:55:18,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-14 12:55:18,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297161858] [2021-12-14 12:55:18,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:55:18,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:55:18,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:55:18,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:55:18,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-14 12:55:18,754 INFO L87 Difference]: Start difference. First operand 23813 states and 31599 transitions. Second operand has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 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) [2021-12-14 12:55:24,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:55:24,464 INFO L93 Difference]: Finished difference Result 68132 states and 91312 transitions. [2021-12-14 12:55:24,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:55:24,464 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 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) Word has length 660 [2021-12-14 12:55:24,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:55:24,507 INFO L225 Difference]: With dead ends: 68132 [2021-12-14 12:55:24,508 INFO L226 Difference]: Without dead ends: 45686 [2021-12-14 12:55:24,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 666 GetRequests, 660 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-14 12:55:24,522 INFO L933 BasicCegarLoop]: 1955 mSDtfsCounter, 1654 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 4891 mSolverCounterSat, 1117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1654 SdHoareTripleChecker+Valid, 2060 SdHoareTripleChecker+Invalid, 6008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1117 IncrementalHoareTripleChecker+Valid, 4891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-12-14 12:55:24,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1654 Valid, 2060 Invalid, 6008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1117 Valid, 4891 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2021-12-14 12:55:24,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45686 states. [2021-12-14 12:55:24,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45686 to 45663. [2021-12-14 12:55:24,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45663 states, 45662 states have (on average 1.3033813674390085) internal successors, (59515), 45662 states have internal predecessors, (59515), 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) [2021-12-14 12:55:24,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45663 states to 45663 states and 59515 transitions. [2021-12-14 12:55:24,906 INFO L78 Accepts]: Start accepts. Automaton has 45663 states and 59515 transitions. Word has length 660 [2021-12-14 12:55:24,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:55:24,907 INFO L470 AbstractCegarLoop]: Abstraction has 45663 states and 59515 transitions. [2021-12-14 12:55:24,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 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) [2021-12-14 12:55:24,907 INFO L276 IsEmpty]: Start isEmpty. Operand 45663 states and 59515 transitions. [2021-12-14 12:55:24,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 668 [2021-12-14 12:55:24,911 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:55:24,911 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:55:24,928 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-14 12:55:25,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 12:55:25,128 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:55:25,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:55:25,128 INFO L85 PathProgramCache]: Analyzing trace with hash 323154289, now seen corresponding path program 1 times [2021-12-14 12:55:25,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:55:25,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436635380] [2021-12-14 12:55:25,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:55:25,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:55:25,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:55:25,338 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 172 proven. 0 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2021-12-14 12:55:25,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:55:25,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436635380] [2021-12-14 12:55:25,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436635380] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:55:25,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 12:55:25,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 12:55:25,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472320931] [2021-12-14 12:55:25,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:55:25,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:55:25,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:55:25,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:55:25,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:55:25,341 INFO L87 Difference]: Start difference. First operand 45663 states and 59515 transitions. Second operand has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 2 states have internal predecessors, (550), 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) [2021-12-14 12:55:30,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 12:55:30,052 INFO L93 Difference]: Finished difference Result 131113 states and 171481 transitions. [2021-12-14 12:55:30,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 12:55:30,053 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 2 states have internal predecessors, (550), 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) Word has length 667 [2021-12-14 12:55:30,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 12:55:30,174 INFO L225 Difference]: With dead ends: 131113 [2021-12-14 12:55:30,174 INFO L226 Difference]: Without dead ends: 86817 [2021-12-14 12:55:30,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 12:55:30,214 INFO L933 BasicCegarLoop]: 1479 mSDtfsCounter, 1353 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 4228 mSolverCounterSat, 1424 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1353 SdHoareTripleChecker+Valid, 1743 SdHoareTripleChecker+Invalid, 5652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1424 IncrementalHoareTripleChecker+Valid, 4228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-14 12:55:30,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1353 Valid, 1743 Invalid, 5652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1424 Valid, 4228 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-12-14 12:55:30,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86817 states. [2021-12-14 12:55:31,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86817 to 78608. [2021-12-14 12:55:31,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78608 states, 78607 states have (on average 1.211953133944814) internal successors, (95268), 78607 states have internal predecessors, (95268), 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) [2021-12-14 12:55:31,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78608 states to 78608 states and 95268 transitions. [2021-12-14 12:55:31,729 INFO L78 Accepts]: Start accepts. Automaton has 78608 states and 95268 transitions. Word has length 667 [2021-12-14 12:55:31,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 12:55:31,729 INFO L470 AbstractCegarLoop]: Abstraction has 78608 states and 95268 transitions. [2021-12-14 12:55:31,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 2 states have internal predecessors, (550), 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) [2021-12-14 12:55:31,730 INFO L276 IsEmpty]: Start isEmpty. Operand 78608 states and 95268 transitions. [2021-12-14 12:55:31,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 885 [2021-12-14 12:55:31,742 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 12:55:31,743 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 12:55:31,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 12:55:31,744 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 12:55:31,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 12:55:31,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1779767841, now seen corresponding path program 1 times [2021-12-14 12:55:31,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 12:55:31,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987359134] [2021-12-14 12:55:31,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:55:31,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 12:55:32,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:55:32,493 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 217 proven. 366 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-12-14 12:55:32,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 12:55:32,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987359134] [2021-12-14 12:55:32,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987359134] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 12:55:32,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255389709] [2021-12-14 12:55:32,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 12:55:32,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 12:55:32,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 12:55:32,502 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 12:55:32,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 12:55:32,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 12:55:32,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 12:55:32,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 12:55:33,607 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-12-14 12:55:33,608 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 12:55:33,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255389709] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 12:55:33,608 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 12:55:33,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-14 12:55:33,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931186217] [2021-12-14 12:55:33,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 12:55:33,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 12:55:33,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 12:55:33,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 12:55:33,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 12:55:33,610 INFO L87 Difference]: Start difference. First operand 78608 states and 95268 transitions. Second operand has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 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)