./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label41.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem13_label41.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 cd32d11e922bf190beba4edd20222f6e5b4dfc210b3394b8307f2a4d7f2efc9e --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 23:55:33,757 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 23:55:33,759 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 23:55:33,798 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 23:55:33,798 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 23:55:33,799 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 23:55:33,802 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 23:55:33,804 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 23:55:33,806 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 23:55:33,809 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 23:55:33,810 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 23:55:33,813 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 23:55:33,814 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 23:55:33,815 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 23:55:33,816 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 23:55:33,818 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 23:55:33,818 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 23:55:33,819 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 23:55:33,821 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 23:55:33,825 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 23:55:33,825 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 23:55:33,827 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 23:55:33,828 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 23:55:33,828 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 23:55:33,830 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 23:55:33,835 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 23:55:33,835 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 23:55:33,835 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 23:55:33,836 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 23:55:33,836 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 23:55:33,837 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 23:55:33,837 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 23:55:33,838 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 23:55:33,839 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 23:55:33,840 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 23:55:33,840 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 23:55:33,840 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 23:55:33,841 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 23:55:33,841 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 23:55:33,841 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 23:55:33,842 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 23:55:33,843 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 23:55:33,847 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 23:55:33,872 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 23:55:33,873 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 23:55:33,873 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 23:55:33,873 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 23:55:33,874 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 23:55:33,874 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 23:55:33,874 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 23:55:33,875 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 23:55:33,875 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 23:55:33,875 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 23:55:33,876 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 23:55:33,876 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 23:55:33,876 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 23:55:33,876 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 23:55:33,876 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 23:55:33,877 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 23:55:33,877 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 23:55:33,877 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 23:55:33,877 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 23:55:33,877 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 23:55:33,877 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 23:55:33,877 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 23:55:33,878 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 23:55:33,878 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 23:55:33,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 23:55:33,878 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 23:55:33,878 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 23:55:33,878 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 23:55:33,879 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 23:55:33,879 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 23:55:33,879 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 23:55:33,879 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 23:55:33,879 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 23:55:33,880 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cd32d11e922bf190beba4edd20222f6e5b4dfc210b3394b8307f2a4d7f2efc9e [2022-07-20 23:55:34,266 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 23:55:34,283 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 23:55:34,285 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 23:55:34,285 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 23:55:34,286 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 23:55:34,286 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label41.c [2022-07-20 23:55:34,326 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34eb43138/40c756a969ae4422b4d6e657f9f27aff/FLAG0fe49cf05 [2022-07-20 23:55:34,818 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 23:55:34,819 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label41.c [2022-07-20 23:55:34,840 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34eb43138/40c756a969ae4422b4d6e657f9f27aff/FLAG0fe49cf05 [2022-07-20 23:55:35,310 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/34eb43138/40c756a969ae4422b4d6e657f9f27aff [2022-07-20 23:55:35,312 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 23:55:35,313 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 23:55:35,315 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 23:55:35,315 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 23:55:35,317 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 23:55:35,318 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:55:35" (1/1) ... [2022-07-20 23:55:35,318 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c3e3e0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:55:35, skipping insertion in model container [2022-07-20 23:55:35,318 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:55:35" (1/1) ... [2022-07-20 23:55:35,323 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 23:55:35,425 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 23:55:35,634 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/Problem13_label41.c[6347,6360] [2022-07-20 23:55:36,318 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 23:55:36,324 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 23:55:36,351 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/Problem13_label41.c[6347,6360] [2022-07-20 23:55:36,822 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 23:55:36,840 INFO L208 MainTranslator]: Completed translation [2022-07-20 23:55:36,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:55:36 WrapperNode [2022-07-20 23:55:36,841 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 23:55:36,842 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 23:55:36,842 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 23:55:36,842 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 23:55:36,847 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:55:36" (1/1) ... [2022-07-20 23:55:36,903 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:55:36" (1/1) ... [2022-07-20 23:55:37,500 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2022-07-20 23:55:37,501 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 23:55:37,502 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 23:55:37,502 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 23:55:37,502 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 23:55:37,507 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:55:36" (1/1) ... [2022-07-20 23:55:37,523 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:55:36" (1/1) ... [2022-07-20 23:55:37,637 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:55:36" (1/1) ... [2022-07-20 23:55:37,638 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:55:36" (1/1) ... [2022-07-20 23:55:37,823 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:55:36" (1/1) ... [2022-07-20 23:55:37,846 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:55:36" (1/1) ... [2022-07-20 23:55:37,912 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:55:36" (1/1) ... [2022-07-20 23:55:37,976 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 23:55:37,979 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 23:55:37,979 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 23:55:37,979 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 23:55:37,980 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:55:36" (1/1) ... [2022-07-20 23:55:37,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 23:55:37,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 23:55:38,009 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-20 23:55:38,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-20 23:55:38,165 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 23:55:38,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 23:55:38,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 23:55:38,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 23:55:38,228 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 23:55:38,229 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 23:55:41,495 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 23:55:41,512 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 23:55:41,512 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-20 23:55:41,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:55:41 BoogieIcfgContainer [2022-07-20 23:55:41,514 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 23:55:41,516 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 23:55:41,516 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 23:55:41,517 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 23:55:41,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:55:35" (1/3) ... [2022-07-20 23:55:41,518 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c5b3fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:55:41, skipping insertion in model container [2022-07-20 23:55:41,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:55:36" (2/3) ... [2022-07-20 23:55:41,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c5b3fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:55:41, skipping insertion in model container [2022-07-20 23:55:41,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:55:41" (3/3) ... [2022-07-20 23:55:41,519 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label41.c [2022-07-20 23:55:41,528 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 23:55:41,528 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 23:55:41,582 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 23:55:41,588 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2169c48b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2f901139 [2022-07-20 23:55:41,588 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 23:55:41,600 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:55:41,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-20 23:55:41,607 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:55:41,607 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:55:41,608 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:55:41,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:55:41,612 INFO L85 PathProgramCache]: Analyzing trace with hash 626000386, now seen corresponding path program 1 times [2022-07-20 23:55:41,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:55:41,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303190835] [2022-07-20 23:55:41,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:55:41,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:55:41,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:55:41,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 23:55:41,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:55:41,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303190835] [2022-07-20 23:55:41,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303190835] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:55:41,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:55:41,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:55:41,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658158893] [2022-07-20 23:55:41,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:55:41,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 23:55:41,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:55:41,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 23:55:41,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 23:55:41,823 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 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 4 states, 4 states have (on average 11.0) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:55:47,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:55:47,663 INFO L93 Difference]: Finished difference Result 3829 states and 7206 transitions. [2022-07-20 23:55:47,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 23:55:47,665 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 3 states have internal predecessors, (44), 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 44 [2022-07-20 23:55:47,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:55:47,690 INFO L225 Difference]: With dead ends: 3829 [2022-07-20 23:55:47,692 INFO L226 Difference]: Without dead ends: 2664 [2022-07-20 23:55:47,699 INFO L412 NwaCegarLoop]: 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 [2022-07-20 23:55:47,705 INFO L413 NwaCegarLoop]: 761 mSDtfsCounter, 2702 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 4246 mSolverCounterSat, 1610 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2702 SdHoareTripleChecker+Valid, 1067 SdHoareTripleChecker+Invalid, 5856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1610 IncrementalHoareTripleChecker+Valid, 4246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-07-20 23:55:47,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2702 Valid, 1067 Invalid, 5856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1610 Valid, 4246 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-07-20 23:55:47,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2664 states. [2022-07-20 23:55:47,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2664 to 2663. [2022-07-20 23:55:47,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2663 states, 2662 states have (on average 1.460931630353118) internal successors, (3889), 2662 states have internal predecessors, (3889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:55:47,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2663 states to 2663 states and 3889 transitions. [2022-07-20 23:55:47,828 INFO L78 Accepts]: Start accepts. Automaton has 2663 states and 3889 transitions. Word has length 44 [2022-07-20 23:55:47,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:55:47,828 INFO L495 AbstractCegarLoop]: Abstraction has 2663 states and 3889 transitions. [2022-07-20 23:55:47,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:55:47,829 INFO L276 IsEmpty]: Start isEmpty. Operand 2663 states and 3889 transitions. [2022-07-20 23:55:47,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-07-20 23:55:47,837 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:55:47,838 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-20 23:55:47,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 23:55:47,838 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:55:47,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:55:47,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1750802861, now seen corresponding path program 1 times [2022-07-20 23:55:47,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:55:47,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020458412] [2022-07-20 23:55:47,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:55:47,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:55:47,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:55:48,001 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 23:55:48,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:55:48,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020458412] [2022-07-20 23:55:48,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020458412] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:55:48,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:55:48,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:55:48,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354509163] [2022-07-20 23:55:48,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:55:48,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 23:55:48,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:55:48,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 23:55:48,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 23:55:48,005 INFO L87 Difference]: Start difference. First operand 2663 states and 3889 transitions. Second operand has 4 states, 4 states have (on average 42.25) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:55:53,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:55:53,757 INFO L93 Difference]: Finished difference Result 7864 states and 12669 transitions. [2022-07-20 23:55:53,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 23:55:53,758 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 3 states have internal predecessors, (169), 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 169 [2022-07-20 23:55:53,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:55:53,794 INFO L225 Difference]: With dead ends: 7864 [2022-07-20 23:55:53,794 INFO L226 Difference]: Without dead ends: 5990 [2022-07-20 23:55:53,802 INFO L412 NwaCegarLoop]: 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 [2022-07-20 23:55:53,804 INFO L413 NwaCegarLoop]: 894 mSDtfsCounter, 1635 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 6333 mSolverCounterSat, 831 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1635 SdHoareTripleChecker+Valid, 1191 SdHoareTripleChecker+Invalid, 7164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 831 IncrementalHoareTripleChecker+Valid, 6333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-07-20 23:55:53,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1635 Valid, 1191 Invalid, 7164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [831 Valid, 6333 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-07-20 23:55:53,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5990 states. [2022-07-20 23:55:53,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5990 to 5859. [2022-07-20 23:55:53,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5859 states, 5858 states have (on average 1.4452031410037556) internal successors, (8466), 5858 states have internal predecessors, (8466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:55:53,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5859 states to 5859 states and 8466 transitions. [2022-07-20 23:55:53,909 INFO L78 Accepts]: Start accepts. Automaton has 5859 states and 8466 transitions. Word has length 169 [2022-07-20 23:55:53,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:55:53,912 INFO L495 AbstractCegarLoop]: Abstraction has 5859 states and 8466 transitions. [2022-07-20 23:55:53,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 3 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:55:53,912 INFO L276 IsEmpty]: Start isEmpty. Operand 5859 states and 8466 transitions. [2022-07-20 23:55:53,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-07-20 23:55:53,917 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:55:53,917 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:55:53,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 23:55:53,919 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:55:53,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:55:53,926 INFO L85 PathProgramCache]: Analyzing trace with hash 459734874, now seen corresponding path program 1 times [2022-07-20 23:55:53,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:55:53,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005571139] [2022-07-20 23:55:53,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:55:53,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:55:54,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:55:54,111 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-07-20 23:55:54,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:55:54,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005571139] [2022-07-20 23:55:54,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005571139] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:55:54,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:55:54,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 23:55:54,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708105534] [2022-07-20 23:55:54,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:55:54,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:55:54,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:55:54,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:55:54,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:55:54,115 INFO L87 Difference]: Start difference. First operand 5859 states and 8466 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:55:57,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:55:57,315 INFO L93 Difference]: Finished difference Result 15687 states and 23390 transitions. [2022-07-20 23:55:57,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:55:57,315 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 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 211 [2022-07-20 23:55:57,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:55:57,342 INFO L225 Difference]: With dead ends: 15687 [2022-07-20 23:55:57,342 INFO L226 Difference]: Without dead ends: 10617 [2022-07-20 23:55:57,349 INFO L412 NwaCegarLoop]: 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 [2022-07-20 23:55:57,350 INFO L413 NwaCegarLoop]: 785 mSDtfsCounter, 919 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 2554 mSolverCounterSat, 756 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 919 SdHoareTripleChecker+Valid, 918 SdHoareTripleChecker+Invalid, 3310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 756 IncrementalHoareTripleChecker+Valid, 2554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-20 23:55:57,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [919 Valid, 918 Invalid, 3310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [756 Valid, 2554 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-20 23:55:57,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10617 states. [2022-07-20 23:55:57,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10617 to 10608. [2022-07-20 23:55:57,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10608 states, 10607 states have (on average 1.3551428302064674) internal successors, (14374), 10607 states have internal predecessors, (14374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:55:57,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10608 states to 10608 states and 14374 transitions. [2022-07-20 23:55:57,506 INFO L78 Accepts]: Start accepts. Automaton has 10608 states and 14374 transitions. Word has length 211 [2022-07-20 23:55:57,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:55:57,507 INFO L495 AbstractCegarLoop]: Abstraction has 10608 states and 14374 transitions. [2022-07-20 23:55:57,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:55:57,508 INFO L276 IsEmpty]: Start isEmpty. Operand 10608 states and 14374 transitions. [2022-07-20 23:55:57,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-07-20 23:55:57,511 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:55:57,511 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-07-20 23:55:57,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-20 23:55:57,511 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:55:57,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:55:57,512 INFO L85 PathProgramCache]: Analyzing trace with hash -2137410665, now seen corresponding path program 1 times [2022-07-20 23:55:57,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:55:57,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755597588] [2022-07-20 23:55:57,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:55:57,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:55:57,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:55:57,655 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-20 23:55:57,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:55:57,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755597588] [2022-07-20 23:55:57,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755597588] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:55:57,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:55:57,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 23:55:57,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935356696] [2022-07-20 23:55:57,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:55:57,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:55:57,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:55:57,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:55:57,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:55:57,658 INFO L87 Difference]: Start difference. First operand 10608 states and 14374 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:00,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:56:00,535 INFO L93 Difference]: Finished difference Result 28351 states and 39240 transitions. [2022-07-20 23:56:00,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:56:00,536 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 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 225 [2022-07-20 23:56:00,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:56:00,586 INFO L225 Difference]: With dead ends: 28351 [2022-07-20 23:56:00,590 INFO L226 Difference]: Without dead ends: 18532 [2022-07-20 23:56:00,599 INFO L412 NwaCegarLoop]: 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 [2022-07-20 23:56:00,605 INFO L413 NwaCegarLoop]: 448 mSDtfsCounter, 909 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 2872 mSolverCounterSat, 544 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 909 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 3416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 544 IncrementalHoareTripleChecker+Valid, 2872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-20 23:56:00,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [909 Valid, 613 Invalid, 3416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [544 Valid, 2872 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-20 23:56:00,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18532 states. [2022-07-20 23:56:00,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18532 to 18523. [2022-07-20 23:56:00,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18523 states, 18522 states have (on average 1.3251268761472843) internal successors, (24544), 18522 states have internal predecessors, (24544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:00,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18523 states to 18523 states and 24544 transitions. [2022-07-20 23:56:00,843 INFO L78 Accepts]: Start accepts. Automaton has 18523 states and 24544 transitions. Word has length 225 [2022-07-20 23:56:00,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:56:00,844 INFO L495 AbstractCegarLoop]: Abstraction has 18523 states and 24544 transitions. [2022-07-20 23:56:00,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:00,845 INFO L276 IsEmpty]: Start isEmpty. Operand 18523 states and 24544 transitions. [2022-07-20 23:56:00,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-07-20 23:56:00,847 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:56:00,847 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-07-20 23:56:00,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-20 23:56:00,848 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:56:00,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:56:00,848 INFO L85 PathProgramCache]: Analyzing trace with hash 253132810, now seen corresponding path program 1 times [2022-07-20 23:56:00,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:56:00,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203024178] [2022-07-20 23:56:00,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:56:00,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:56:00,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:56:00,940 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 178 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 23:56:00,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:56:00,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203024178] [2022-07-20 23:56:00,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203024178] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:56:00,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:56:00,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:56:00,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260260591] [2022-07-20 23:56:00,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:56:00,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:56:00,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:56:00,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:56:00,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:56:00,944 INFO L87 Difference]: Start difference. First operand 18523 states and 24544 transitions. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:03,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:56:03,745 INFO L93 Difference]: Finished difference Result 52015 states and 69799 transitions. [2022-07-20 23:56:03,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:56:03,749 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 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 243 [2022-07-20 23:56:03,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:56:03,808 INFO L225 Difference]: With dead ends: 52015 [2022-07-20 23:56:03,808 INFO L226 Difference]: Without dead ends: 34281 [2022-07-20 23:56:03,828 INFO L412 NwaCegarLoop]: 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 [2022-07-20 23:56:03,829 INFO L413 NwaCegarLoop]: 833 mSDtfsCounter, 852 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 2393 mSolverCounterSat, 915 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 951 SdHoareTripleChecker+Invalid, 3308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 915 IncrementalHoareTripleChecker+Valid, 2393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-20 23:56:03,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [852 Valid, 951 Invalid, 3308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [915 Valid, 2393 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-20 23:56:03,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34281 states. [2022-07-20 23:56:04,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34281 to 34271. [2022-07-20 23:56:04,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34271 states, 34270 states have (on average 1.25503355704698) internal successors, (43010), 34270 states have internal predecessors, (43010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:04,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34271 states to 34271 states and 43010 transitions. [2022-07-20 23:56:04,230 INFO L78 Accepts]: Start accepts. Automaton has 34271 states and 43010 transitions. Word has length 243 [2022-07-20 23:56:04,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:56:04,231 INFO L495 AbstractCegarLoop]: Abstraction has 34271 states and 43010 transitions. [2022-07-20 23:56:04,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:04,234 INFO L276 IsEmpty]: Start isEmpty. Operand 34271 states and 43010 transitions. [2022-07-20 23:56:04,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2022-07-20 23:56:04,237 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:56:04,237 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-07-20 23:56:04,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-20 23:56:04,238 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:56:04,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:56:04,238 INFO L85 PathProgramCache]: Analyzing trace with hash -984622565, now seen corresponding path program 1 times [2022-07-20 23:56:04,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:56:04,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782300058] [2022-07-20 23:56:04,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:56:04,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:56:04,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:56:04,344 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-07-20 23:56:04,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:56:04,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782300058] [2022-07-20 23:56:04,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782300058] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:56:04,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:56:04,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 23:56:04,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382995689] [2022-07-20 23:56:04,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:56:04,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:56:04,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:56:04,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:56:04,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:56:04,346 INFO L87 Difference]: Start difference. First operand 34271 states and 43010 transitions. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:07,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:56:07,284 INFO L93 Difference]: Finished difference Result 92929 states and 117620 transitions. [2022-07-20 23:56:07,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:56:07,289 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 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 274 [2022-07-20 23:56:07,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:56:07,360 INFO L225 Difference]: With dead ends: 92929 [2022-07-20 23:56:07,360 INFO L226 Difference]: Without dead ends: 59447 [2022-07-20 23:56:07,385 INFO L412 NwaCegarLoop]: 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 [2022-07-20 23:56:07,387 INFO L413 NwaCegarLoop]: 839 mSDtfsCounter, 857 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2308 mSolverCounterSat, 869 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 986 SdHoareTripleChecker+Invalid, 3177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 869 IncrementalHoareTripleChecker+Valid, 2308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-20 23:56:07,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [857 Valid, 986 Invalid, 3177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [869 Valid, 2308 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-20 23:56:07,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59447 states. [2022-07-20 23:56:07,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59447 to 57869. [2022-07-20 23:56:07,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57869 states, 57868 states have (on average 1.1960496301928527) internal successors, (69213), 57868 states have internal predecessors, (69213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:07,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57869 states to 57869 states and 69213 transitions. [2022-07-20 23:56:07,891 INFO L78 Accepts]: Start accepts. Automaton has 57869 states and 69213 transitions. Word has length 274 [2022-07-20 23:56:07,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:56:07,893 INFO L495 AbstractCegarLoop]: Abstraction has 57869 states and 69213 transitions. [2022-07-20 23:56:07,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:07,894 INFO L276 IsEmpty]: Start isEmpty. Operand 57869 states and 69213 transitions. [2022-07-20 23:56:07,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2022-07-20 23:56:07,898 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:56:07,898 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:56:07,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-20 23:56:07,898 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:56:07,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:56:07,899 INFO L85 PathProgramCache]: Analyzing trace with hash 2026738478, now seen corresponding path program 1 times [2022-07-20 23:56:07,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:56:07,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169975293] [2022-07-20 23:56:07,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:56:07,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:56:07,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:56:07,985 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 319 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-20 23:56:07,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:56:07,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169975293] [2022-07-20 23:56:07,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169975293] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:56:07,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:56:07,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:56:07,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475815550] [2022-07-20 23:56:07,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:56:07,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 23:56:07,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:56:07,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 23:56:07,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 23:56:07,987 INFO L87 Difference]: Start difference. First operand 57869 states and 69213 transitions. Second operand has 4 states, 4 states have (on average 67.75) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:13,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:56:13,937 INFO L93 Difference]: Finished difference Result 156096 states and 188759 transitions. [2022-07-20 23:56:13,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 23:56:13,938 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 67.75) internal successors, (271), 3 states have internal predecessors, (271), 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 312 [2022-07-20 23:56:13,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:56:14,056 INFO L225 Difference]: With dead ends: 156096 [2022-07-20 23:56:14,056 INFO L226 Difference]: Without dead ends: 99016 [2022-07-20 23:56:14,080 INFO L412 NwaCegarLoop]: 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 [2022-07-20 23:56:14,080 INFO L413 NwaCegarLoop]: 500 mSDtfsCounter, 1733 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 6695 mSolverCounterSat, 1119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1733 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 7814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1119 IncrementalHoareTripleChecker+Valid, 6695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-07-20 23:56:14,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1733 Valid, 742 Invalid, 7814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1119 Valid, 6695 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-07-20 23:56:14,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99016 states. [2022-07-20 23:56:14,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99016 to 97314. [2022-07-20 23:56:14,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97314 states, 97313 states have (on average 1.1924511627429017) internal successors, (116041), 97313 states have internal predecessors, (116041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:14,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97314 states to 97314 states and 116041 transitions. [2022-07-20 23:56:14,946 INFO L78 Accepts]: Start accepts. Automaton has 97314 states and 116041 transitions. Word has length 312 [2022-07-20 23:56:14,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:56:14,946 INFO L495 AbstractCegarLoop]: Abstraction has 97314 states and 116041 transitions. [2022-07-20 23:56:14,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 67.75) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:14,947 INFO L276 IsEmpty]: Start isEmpty. Operand 97314 states and 116041 transitions. [2022-07-20 23:56:14,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2022-07-20 23:56:14,951 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:56:14,951 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:56:14,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-20 23:56:14,951 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:56:14,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:56:14,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1403591816, now seen corresponding path program 1 times [2022-07-20 23:56:14,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:56:14,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812893840] [2022-07-20 23:56:14,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:56:14,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:56:15,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:56:15,449 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 224 proven. 0 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-07-20 23:56:15,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:56:15,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812893840] [2022-07-20 23:56:15,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812893840] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:56:15,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:56:15,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 23:56:15,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154287117] [2022-07-20 23:56:15,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:56:15,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:56:15,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:56:15,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:56:15,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:56:15,451 INFO L87 Difference]: Start difference. First operand 97314 states and 116041 transitions. Second operand has 3 states, 3 states have (on average 64.0) internal successors, (192), 2 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:18,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:56:18,658 INFO L93 Difference]: Finished difference Result 179673 states and 215982 transitions. [2022-07-20 23:56:18,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:56:18,658 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 2 states have internal predecessors, (192), 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 327 [2022-07-20 23:56:18,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:56:18,788 INFO L225 Difference]: With dead ends: 179673 [2022-07-20 23:56:18,789 INFO L226 Difference]: Without dead ends: 97326 [2022-07-20 23:56:18,964 INFO L412 NwaCegarLoop]: 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 [2022-07-20 23:56:18,973 INFO L413 NwaCegarLoop]: 1021 mSDtfsCounter, 730 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 2706 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 1202 SdHoareTripleChecker+Invalid, 2710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 2706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-20 23:56:18,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [730 Valid, 1202 Invalid, 2710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 2706 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-20 23:56:19,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97326 states. [2022-07-20 23:56:19,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97326 to 97314. [2022-07-20 23:56:19,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97314 states, 97313 states have (on average 1.191526312003535) internal successors, (115951), 97313 states have internal predecessors, (115951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:19,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97314 states to 97314 states and 115951 transitions. [2022-07-20 23:56:20,000 INFO L78 Accepts]: Start accepts. Automaton has 97314 states and 115951 transitions. Word has length 327 [2022-07-20 23:56:20,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:56:20,000 INFO L495 AbstractCegarLoop]: Abstraction has 97314 states and 115951 transitions. [2022-07-20 23:56:20,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 2 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:20,001 INFO L276 IsEmpty]: Start isEmpty. Operand 97314 states and 115951 transitions. [2022-07-20 23:56:20,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2022-07-20 23:56:20,005 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:56:20,005 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:56:20,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-20 23:56:20,006 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:56:20,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:56:20,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1888810318, now seen corresponding path program 1 times [2022-07-20 23:56:20,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:56:20,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787215722] [2022-07-20 23:56:20,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:56:20,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:56:20,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:56:20,429 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 227 proven. 110 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-20 23:56:20,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:56:20,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787215722] [2022-07-20 23:56:20,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787215722] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 23:56:20,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762093790] [2022-07-20 23:56:20,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:56:20,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 23:56:20,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 23:56:20,436 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) [2022-07-20 23:56:20,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 23:56:20,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:56:20,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 23:56:20,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 23:56:20,667 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 266 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-07-20 23:56:20,668 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 23:56:20,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762093790] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:56:20,668 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 23:56:20,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2022-07-20 23:56:20,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784917467] [2022-07-20 23:56:20,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:56:20,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:56:20,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:56:20,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:56:20,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-20 23:56:20,670 INFO L87 Difference]: Start difference. First operand 97314 states and 115951 transitions. Second operand has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:23,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:56:23,800 INFO L93 Difference]: Finished difference Result 193050 states and 229955 transitions. [2022-07-20 23:56:23,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:56:23,800 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 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 356 [2022-07-20 23:56:23,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:56:23,916 INFO L225 Difference]: With dead ends: 193050 [2022-07-20 23:56:23,917 INFO L226 Difference]: Without dead ends: 96525 [2022-07-20 23:56:23,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 355 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-20 23:56:23,947 INFO L413 NwaCegarLoop]: 1366 mSDtfsCounter, 1138 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2467 mSolverCounterSat, 451 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1138 SdHoareTripleChecker+Valid, 1448 SdHoareTripleChecker+Invalid, 2918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 451 IncrementalHoareTripleChecker+Valid, 2467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-20 23:56:23,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1138 Valid, 1448 Invalid, 2918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [451 Valid, 2467 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-20 23:56:24,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96525 states. [2022-07-20 23:56:24,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96525 to 96524. [2022-07-20 23:56:24,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96524 states, 96523 states have (on average 1.1407850978523253) internal successors, (110112), 96523 states have internal predecessors, (110112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:25,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96524 states to 96524 states and 110112 transitions. [2022-07-20 23:56:25,113 INFO L78 Accepts]: Start accepts. Automaton has 96524 states and 110112 transitions. Word has length 356 [2022-07-20 23:56:25,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:56:25,114 INFO L495 AbstractCegarLoop]: Abstraction has 96524 states and 110112 transitions. [2022-07-20 23:56:25,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:25,114 INFO L276 IsEmpty]: Start isEmpty. Operand 96524 states and 110112 transitions. [2022-07-20 23:56:25,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2022-07-20 23:56:25,118 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:56:25,118 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:56:25,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-20 23:56:25,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 23:56:25,326 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:56:25,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:56:25,326 INFO L85 PathProgramCache]: Analyzing trace with hash 171285418, now seen corresponding path program 1 times [2022-07-20 23:56:25,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:56:25,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950248580] [2022-07-20 23:56:25,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:56:25,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:56:25,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:56:25,420 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 362 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-20 23:56:25,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:56:25,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950248580] [2022-07-20 23:56:25,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950248580] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:56:25,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:56:25,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:56:25,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523790786] [2022-07-20 23:56:25,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:56:25,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:56:25,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:56:25,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:56:25,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:56:25,422 INFO L87 Difference]: Start difference. First operand 96524 states and 110112 transitions. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:28,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:56:28,542 INFO L93 Difference]: Finished difference Result 192231 states and 219122 transitions. [2022-07-20 23:56:28,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:56:28,543 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 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 361 [2022-07-20 23:56:28,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:56:28,675 INFO L225 Difference]: With dead ends: 192231 [2022-07-20 23:56:28,676 INFO L226 Difference]: Without dead ends: 96496 [2022-07-20 23:56:28,707 INFO L412 NwaCegarLoop]: 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 [2022-07-20 23:56:28,708 INFO L413 NwaCegarLoop]: 1503 mSDtfsCounter, 1035 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 2348 mSolverCounterSat, 593 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1035 SdHoareTripleChecker+Valid, 1639 SdHoareTripleChecker+Invalid, 2941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 593 IncrementalHoareTripleChecker+Valid, 2348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-20 23:56:28,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1035 Valid, 1639 Invalid, 2941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [593 Valid, 2348 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-20 23:56:28,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96496 states. [2022-07-20 23:56:29,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96496 to 92551. [2022-07-20 23:56:29,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92551 states, 92550 states have (on average 1.0978065910318746) internal successors, (101602), 92550 states have internal predecessors, (101602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:29,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92551 states to 92551 states and 101602 transitions. [2022-07-20 23:56:29,889 INFO L78 Accepts]: Start accepts. Automaton has 92551 states and 101602 transitions. Word has length 361 [2022-07-20 23:56:29,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:56:29,890 INFO L495 AbstractCegarLoop]: Abstraction has 92551 states and 101602 transitions. [2022-07-20 23:56:29,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:29,890 INFO L276 IsEmpty]: Start isEmpty. Operand 92551 states and 101602 transitions. [2022-07-20 23:56:29,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2022-07-20 23:56:29,894 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:56:29,894 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:56:29,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-20 23:56:29,895 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:56:29,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:56:29,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1366551800, now seen corresponding path program 1 times [2022-07-20 23:56:29,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:56:29,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971573876] [2022-07-20 23:56:29,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:56:29,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:56:29,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:56:30,034 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2022-07-20 23:56:30,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:56:30,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971573876] [2022-07-20 23:56:30,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971573876] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:56:30,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:56:30,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:56:30,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433909742] [2022-07-20 23:56:30,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:56:30,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 23:56:30,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:56:30,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 23:56:30,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 23:56:30,037 INFO L87 Difference]: Start difference. First operand 92551 states and 101602 transitions. Second operand has 4 states, 4 states have (on average 47.25) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:35,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:56:35,317 INFO L93 Difference]: Finished difference Result 203278 states and 225307 transitions. [2022-07-20 23:56:35,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 23:56:35,323 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 47.25) internal successors, (189), 3 states have internal predecessors, (189), 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 371 [2022-07-20 23:56:35,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:56:35,496 INFO L225 Difference]: With dead ends: 203278 [2022-07-20 23:56:35,497 INFO L226 Difference]: Without dead ends: 124905 [2022-07-20 23:56:35,559 INFO L412 NwaCegarLoop]: 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 [2022-07-20 23:56:35,559 INFO L413 NwaCegarLoop]: 645 mSDtfsCounter, 1628 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 5244 mSolverCounterSat, 854 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1628 SdHoareTripleChecker+Valid, 872 SdHoareTripleChecker+Invalid, 6098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 854 IncrementalHoareTripleChecker+Valid, 5244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-07-20 23:56:35,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1628 Valid, 872 Invalid, 6098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [854 Valid, 5244 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-07-20 23:56:35,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124905 states. [2022-07-20 23:56:36,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124905 to 109097. [2022-07-20 23:56:37,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109097 states, 109096 states have (on average 1.0896641490063796) internal successors, (118878), 109096 states have internal predecessors, (118878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:37,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109097 states to 109097 states and 118878 transitions. [2022-07-20 23:56:37,208 INFO L78 Accepts]: Start accepts. Automaton has 109097 states and 118878 transitions. Word has length 371 [2022-07-20 23:56:37,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:56:37,209 INFO L495 AbstractCegarLoop]: Abstraction has 109097 states and 118878 transitions. [2022-07-20 23:56:37,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.25) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:37,209 INFO L276 IsEmpty]: Start isEmpty. Operand 109097 states and 118878 transitions. [2022-07-20 23:56:37,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2022-07-20 23:56:37,214 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:56:37,214 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 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] [2022-07-20 23:56:37,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-20 23:56:37,215 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:56:37,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:56:37,215 INFO L85 PathProgramCache]: Analyzing trace with hash 110747954, now seen corresponding path program 1 times [2022-07-20 23:56:37,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:56:37,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011580901] [2022-07-20 23:56:37,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:56:37,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:56:37,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:56:37,335 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 167 proven. 0 refuted. 0 times theorem prover too weak. 445 trivial. 0 not checked. [2022-07-20 23:56:37,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:56:37,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011580901] [2022-07-20 23:56:37,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011580901] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:56:37,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:56:37,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:56:37,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797873734] [2022-07-20 23:56:37,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:56:37,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:56:37,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:56:37,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:56:37,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:56:37,338 INFO L87 Difference]: Start difference. First operand 109097 states and 118878 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:41,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:56:41,263 INFO L93 Difference]: Finished difference Result 253633 states and 275693 transitions. [2022-07-20 23:56:41,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:56:41,264 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 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 373 [2022-07-20 23:56:41,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:56:41,520 INFO L225 Difference]: With dead ends: 253633 [2022-07-20 23:56:41,520 INFO L226 Difference]: Without dead ends: 144538 [2022-07-20 23:56:41,590 INFO L412 NwaCegarLoop]: 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 [2022-07-20 23:56:41,591 INFO L413 NwaCegarLoop]: 1281 mSDtfsCounter, 1059 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 2471 mSolverCounterSat, 706 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1059 SdHoareTripleChecker+Valid, 1331 SdHoareTripleChecker+Invalid, 3177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 706 IncrementalHoareTripleChecker+Valid, 2471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-20 23:56:41,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1059 Valid, 1331 Invalid, 3177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [706 Valid, 2471 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-20 23:56:41,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144538 states. [2022-07-20 23:56:43,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144538 to 136630. [2022-07-20 23:56:43,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136630 states, 136629 states have (on average 1.078145928024065) internal successors, (147306), 136629 states have internal predecessors, (147306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:43,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136630 states to 136630 states and 147306 transitions. [2022-07-20 23:56:43,604 INFO L78 Accepts]: Start accepts. Automaton has 136630 states and 147306 transitions. Word has length 373 [2022-07-20 23:56:43,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:56:43,605 INFO L495 AbstractCegarLoop]: Abstraction has 136630 states and 147306 transitions. [2022-07-20 23:56:43,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:43,605 INFO L276 IsEmpty]: Start isEmpty. Operand 136630 states and 147306 transitions. [2022-07-20 23:56:43,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2022-07-20 23:56:43,615 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:56:43,615 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:56:43,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-20 23:56:43,616 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:56:43,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:56:43,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1800348005, now seen corresponding path program 1 times [2022-07-20 23:56:43,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:56:43,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839919477] [2022-07-20 23:56:43,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:56:43,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:56:43,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:56:43,887 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 387 proven. 113 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2022-07-20 23:56:43,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:56:43,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839919477] [2022-07-20 23:56:43,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839919477] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 23:56:43,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679039000] [2022-07-20 23:56:43,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:56:43,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 23:56:43,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 23:56:43,890 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) [2022-07-20 23:56:43,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 23:56:44,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:56:44,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 23:56:44,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 23:56:44,689 INFO L134 CoverageAnalysis]: Checked inductivity of 652 backedges. 387 proven. 0 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2022-07-20 23:56:44,689 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 23:56:44,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679039000] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:56:44,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 23:56:44,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-07-20 23:56:44,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331994050] [2022-07-20 23:56:44,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:56:44,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:56:44,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:56:44,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:56:44,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-07-20 23:56:44,698 INFO L87 Difference]: Start difference. First operand 136630 states and 147306 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:47,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:56:47,881 INFO L93 Difference]: Finished difference Result 266967 states and 288175 transitions. [2022-07-20 23:56:47,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:56:47,882 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 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 438 [2022-07-20 23:56:47,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:56:48,057 INFO L225 Difference]: With dead ends: 266967 [2022-07-20 23:56:48,057 INFO L226 Difference]: Without dead ends: 142941 [2022-07-20 23:56:48,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 437 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-07-20 23:56:48,109 INFO L413 NwaCegarLoop]: 1020 mSDtfsCounter, 685 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 2451 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 685 SdHoareTripleChecker+Valid, 1153 SdHoareTripleChecker+Invalid, 2605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 2451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-20 23:56:48,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [685 Valid, 1153 Invalid, 2605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 2451 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-20 23:56:48,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142941 states. [2022-07-20 23:56:49,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142941 to 138995. [2022-07-20 23:56:49,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138995 states, 138994 states have (on average 1.0716074075139934) internal successors, (148947), 138994 states have internal predecessors, (148947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:49,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138995 states to 138995 states and 148947 transitions. [2022-07-20 23:56:49,733 INFO L78 Accepts]: Start accepts. Automaton has 138995 states and 148947 transitions. Word has length 438 [2022-07-20 23:56:49,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:56:49,734 INFO L495 AbstractCegarLoop]: Abstraction has 138995 states and 148947 transitions. [2022-07-20 23:56:49,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:49,734 INFO L276 IsEmpty]: Start isEmpty. Operand 138995 states and 148947 transitions. [2022-07-20 23:56:49,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2022-07-20 23:56:49,741 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:56:49,742 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:56:49,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 23:56:49,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-20 23:56:49,947 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:56:49,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:56:49,947 INFO L85 PathProgramCache]: Analyzing trace with hash -923512325, now seen corresponding path program 1 times [2022-07-20 23:56:49,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:56:49,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283386593] [2022-07-20 23:56:49,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:56:49,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:56:49,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:56:50,069 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 466 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2022-07-20 23:56:50,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:56:50,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283386593] [2022-07-20 23:56:50,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283386593] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:56:50,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:56:50,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:56:50,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716060792] [2022-07-20 23:56:50,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:56:50,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:56:50,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:56:50,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:56:50,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:56:50,072 INFO L87 Difference]: Start difference. First operand 138995 states and 148947 transitions. Second operand has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:53,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:56:53,991 INFO L93 Difference]: Finished difference Result 314207 states and 338433 transitions. [2022-07-20 23:56:53,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:56:53,992 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 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 475 [2022-07-20 23:56:53,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:56:54,207 INFO L225 Difference]: With dead ends: 314207 [2022-07-20 23:56:54,207 INFO L226 Difference]: Without dead ends: 174427 [2022-07-20 23:56:54,251 INFO L412 NwaCegarLoop]: 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 [2022-07-20 23:56:54,252 INFO L413 NwaCegarLoop]: 1766 mSDtfsCounter, 736 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 2517 mSolverCounterSat, 588 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 736 SdHoareTripleChecker+Valid, 1912 SdHoareTripleChecker+Invalid, 3105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 588 IncrementalHoareTripleChecker+Valid, 2517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-20 23:56:54,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [736 Valid, 1912 Invalid, 3105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [588 Valid, 2517 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-07-20 23:56:54,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174427 states. [2022-07-20 23:56:56,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174427 to 171261. [2022-07-20 23:56:56,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171261 states, 171260 states have (on average 1.062057690061894) internal successors, (181888), 171260 states have internal predecessors, (181888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:56,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171261 states to 171261 states and 181888 transitions. [2022-07-20 23:56:56,325 INFO L78 Accepts]: Start accepts. Automaton has 171261 states and 181888 transitions. Word has length 475 [2022-07-20 23:56:56,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:56:56,325 INFO L495 AbstractCegarLoop]: Abstraction has 171261 states and 181888 transitions. [2022-07-20 23:56:56,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:56:56,326 INFO L276 IsEmpty]: Start isEmpty. Operand 171261 states and 181888 transitions. [2022-07-20 23:56:56,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2022-07-20 23:56:56,334 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:56:56,334 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-20 23:56:56,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-20 23:56:56,335 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:56:56,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:56:56,335 INFO L85 PathProgramCache]: Analyzing trace with hash 27973580, now seen corresponding path program 1 times [2022-07-20 23:56:56,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:56:56,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000417989] [2022-07-20 23:56:56,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:56:56,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:56:56,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:56:56,460 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 533 proven. 0 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2022-07-20 23:56:56,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:56:56,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000417989] [2022-07-20 23:56:56,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000417989] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:56:56,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:56:56,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:56:56,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038152508] [2022-07-20 23:56:56,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:56:56,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:56:56,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:56:56,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:56:56,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:56:56,462 INFO L87 Difference]: Start difference. First operand 171261 states and 181888 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) [2022-07-20 23:57:00,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:57:00,392 INFO L93 Difference]: Finished difference Result 375583 states and 400857 transitions. [2022-07-20 23:57:00,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:57:00,393 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 484 [2022-07-20 23:57:00,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:57:00,705 INFO L225 Difference]: With dead ends: 375583 [2022-07-20 23:57:00,705 INFO L226 Difference]: Without dead ends: 205111 [2022-07-20 23:57:00,792 INFO L412 NwaCegarLoop]: 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 [2022-07-20 23:57:00,792 INFO L413 NwaCegarLoop]: 607 mSDtfsCounter, 918 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 2330 mSolverCounterSat, 894 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 918 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 3224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 894 IncrementalHoareTripleChecker+Valid, 2330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-20 23:57:00,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [918 Valid, 687 Invalid, 3224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [894 Valid, 2330 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-20 23:57:00,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205111 states. [2022-07-20 23:57:03,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205111 to 203516. [2022-07-20 23:57:03,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203516 states, 203515 states have (on average 1.0639314055475027) internal successors, (216526), 203515 states have internal predecessors, (216526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:57:03,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203516 states to 203516 states and 216526 transitions. [2022-07-20 23:57:03,493 INFO L78 Accepts]: Start accepts. Automaton has 203516 states and 216526 transitions. Word has length 484 [2022-07-20 23:57:03,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:57:03,493 INFO L495 AbstractCegarLoop]: Abstraction has 203516 states and 216526 transitions. [2022-07-20 23:57:03,494 INFO L496 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) [2022-07-20 23:57:03,494 INFO L276 IsEmpty]: Start isEmpty. Operand 203516 states and 216526 transitions. [2022-07-20 23:57:03,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2022-07-20 23:57:03,501 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:57:03,501 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-20 23:57:03,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-20 23:57:03,501 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:57:03,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:57:03,524 INFO L85 PathProgramCache]: Analyzing trace with hash 283132930, now seen corresponding path program 1 times [2022-07-20 23:57:03,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:57:03,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884337261] [2022-07-20 23:57:03,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:57:03,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:57:03,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:57:03,759 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 209 proven. 0 refuted. 0 times theorem prover too weak. 757 trivial. 0 not checked. [2022-07-20 23:57:03,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:57:03,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884337261] [2022-07-20 23:57:03,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884337261] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:57:03,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:57:03,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:57:03,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072973858] [2022-07-20 23:57:03,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:57:03,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:57:03,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:57:03,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:57:03,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:57:03,761 INFO L87 Difference]: Start difference. First operand 203516 states and 216526 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:57:08,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:57:08,325 INFO L93 Difference]: Finished difference Result 412532 states and 439817 transitions. [2022-07-20 23:57:08,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:57:08,326 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 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 488 [2022-07-20 23:57:08,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:57:08,639 INFO L225 Difference]: With dead ends: 412532 [2022-07-20 23:57:08,639 INFO L226 Difference]: Without dead ends: 229486 [2022-07-20 23:57:08,742 INFO L412 NwaCegarLoop]: 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 [2022-07-20 23:57:08,742 INFO L413 NwaCegarLoop]: 1494 mSDtfsCounter, 855 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 2715 mSolverCounterSat, 391 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 855 SdHoareTripleChecker+Valid, 1650 SdHoareTripleChecker+Invalid, 3106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 391 IncrementalHoareTripleChecker+Valid, 2715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-07-20 23:57:08,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [855 Valid, 1650 Invalid, 3106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [391 Valid, 2715 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-07-20 23:57:08,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229486 states.