./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pals_lcr.5.1.ufo.UNBOUNDED.pals+Problem12_label02.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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/combinations/pals_lcr.5.1.ufo.UNBOUNDED.pals+Problem12_label02.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 f64db8798478892c7952ed2e39de053718a88a4933b23364a7fdbf37373a3455 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 02:19:27,796 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 02:19:27,823 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 02:19:27,864 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 02:19:27,865 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 02:19:27,868 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 02:19:27,870 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 02:19:27,876 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 02:19:27,878 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 02:19:27,884 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 02:19:27,885 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 02:19:27,887 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 02:19:27,887 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 02:19:27,889 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 02:19:27,891 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 02:19:27,895 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 02:19:27,896 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 02:19:27,898 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 02:19:27,902 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 02:19:27,904 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 02:19:27,908 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 02:19:27,909 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 02:19:27,910 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 02:19:27,911 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 02:19:27,913 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 02:19:27,917 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 02:19:27,918 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 02:19:27,919 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 02:19:27,919 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 02:19:27,921 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 02:19:27,921 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 02:19:27,922 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 02:19:27,923 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 02:19:27,923 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 02:19:27,925 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 02:19:27,925 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 02:19:27,926 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 02:19:27,926 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 02:19:27,926 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 02:19:27,927 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 02:19:27,928 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 02:19:27,929 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 02:19:27,958 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 02:19:27,958 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 02:19:27,959 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 02:19:27,959 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 02:19:27,960 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 02:19:27,960 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 02:19:27,961 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 02:19:27,961 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 02:19:27,961 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 02:19:27,961 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 02:19:27,962 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 02:19:27,962 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 02:19:27,963 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 02:19:27,963 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 02:19:27,963 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 02:19:27,963 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 02:19:27,963 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 02:19:27,963 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 02:19:27,964 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 02:19:27,964 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 02:19:27,964 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 02:19:27,964 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 02:19:27,964 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 02:19:27,964 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 02:19:27,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 02:19:27,965 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 02:19:27,965 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 02:19:27,966 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 02:19:27,966 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 02:19:27,967 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 02:19:27,967 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 02:19:27,967 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 02:19:27,967 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 02:19:27,967 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 02:19:27,968 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f64db8798478892c7952ed2e39de053718a88a4933b23364a7fdbf37373a3455 [2021-12-16 02:19:28,211 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 02:19:28,242 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 02:19:28,245 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 02:19:28,246 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 02:19:28,246 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 02:19:28,248 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.5.1.ufo.UNBOUNDED.pals+Problem12_label02.c [2021-12-16 02:19:28,308 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da3b341a6/f790e1971b504d7cb0282948d12dfedd/FLAG7b2abc044 [2021-12-16 02:19:28,944 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 02:19:28,944 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.1.ufo.UNBOUNDED.pals+Problem12_label02.c [2021-12-16 02:19:28,975 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da3b341a6/f790e1971b504d7cb0282948d12dfedd/FLAG7b2abc044 [2021-12-16 02:19:29,309 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/da3b341a6/f790e1971b504d7cb0282948d12dfedd [2021-12-16 02:19:29,311 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 02:19:29,314 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 02:19:29,316 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 02:19:29,316 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 02:19:29,319 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 02:19:29,320 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 02:19:29" (1/1) ... [2021-12-16 02:19:29,321 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73da3b61 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:19:29, skipping insertion in model container [2021-12-16 02:19:29,321 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 02:19:29" (1/1) ... [2021-12-16 02:19:29,327 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 02:19:29,443 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 02:19:29,778 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/combinations/pals_lcr.5.1.ufo.UNBOUNDED.pals+Problem12_label02.c[11705,11718] [2021-12-16 02:19:29,834 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/combinations/pals_lcr.5.1.ufo.UNBOUNDED.pals+Problem12_label02.c[18995,19008] [2021-12-16 02:19:30,358 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 02:19:30,369 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 02:19:30,403 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/combinations/pals_lcr.5.1.ufo.UNBOUNDED.pals+Problem12_label02.c[11705,11718] [2021-12-16 02:19:30,416 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/combinations/pals_lcr.5.1.ufo.UNBOUNDED.pals+Problem12_label02.c[18995,19008] [2021-12-16 02:19:30,742 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 02:19:30,766 INFO L208 MainTranslator]: Completed translation [2021-12-16 02:19:30,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:19:30 WrapperNode [2021-12-16 02:19:30,767 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 02:19:30,768 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 02:19:30,768 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 02:19:30,768 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 02:19:30,774 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:19:30" (1/1) ... [2021-12-16 02:19:30,828 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:19:30" (1/1) ... [2021-12-16 02:19:31,243 INFO L137 Inliner]: procedures = 37, calls = 22, calls flagged for inlining = 17, calls inlined = 17, statements flattened = 5089 [2021-12-16 02:19:31,244 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 02:19:31,245 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 02:19:31,245 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 02:19:31,245 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 02:19:31,265 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:19:30" (1/1) ... [2021-12-16 02:19:31,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:19:30" (1/1) ... [2021-12-16 02:19:31,389 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:19:30" (1/1) ... [2021-12-16 02:19:31,390 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:19:30" (1/1) ... [2021-12-16 02:19:31,555 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:19:30" (1/1) ... [2021-12-16 02:19:31,587 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:19:30" (1/1) ... [2021-12-16 02:19:31,606 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:19:30" (1/1) ... [2021-12-16 02:19:31,640 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 02:19:31,641 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 02:19:31,641 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 02:19:31,642 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 02:19:31,644 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:19:30" (1/1) ... [2021-12-16 02:19:31,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 02:19:31,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:19:31,723 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-16 02:19:31,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-16 02:19:31,768 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 02:19:31,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 02:19:31,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 02:19:31,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 02:19:31,932 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 02:19:31,933 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 02:19:34,875 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 02:19:34,888 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 02:19:34,888 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-16 02:19:34,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 02:19:34 BoogieIcfgContainer [2021-12-16 02:19:34,891 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 02:19:34,892 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 02:19:34,892 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 02:19:34,894 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 02:19:34,894 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 02:19:29" (1/3) ... [2021-12-16 02:19:34,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10cffa5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 02:19:34, skipping insertion in model container [2021-12-16 02:19:34,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:19:30" (2/3) ... [2021-12-16 02:19:34,895 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10cffa5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 02:19:34, skipping insertion in model container [2021-12-16 02:19:34,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 02:19:34" (3/3) ... [2021-12-16 02:19:34,896 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.1.ufo.UNBOUNDED.pals+Problem12_label02.c [2021-12-16 02:19:34,899 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 02:19:34,915 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-16 02:19:34,973 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 02:19:34,978 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-16 02:19:34,978 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-16 02:19:35,015 INFO L276 IsEmpty]: Start isEmpty. Operand has 911 states, 908 states have (on average 1.8997797356828194) internal successors, (1725), 910 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:35,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-16 02:19:35,022 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:19:35,023 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:19:35,024 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:19:35,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:19:35,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1083425478, now seen corresponding path program 1 times [2021-12-16 02:19:35,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:19:35,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749208114] [2021-12-16 02:19:35,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:19:35,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:19:35,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:19:35,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:19:35,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:19:35,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749208114] [2021-12-16 02:19:35,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749208114] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:19:35,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:19:35,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 02:19:35,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847513696] [2021-12-16 02:19:35,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:19:35,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-16 02:19:35,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:19:35,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-16 02:19:35,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 02:19:35,203 INFO L87 Difference]: Start difference. First operand has 911 states, 908 states have (on average 1.8997797356828194) internal successors, (1725), 910 states have internal predecessors, (1725), 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 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:35,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:19:35,270 INFO L93 Difference]: Finished difference Result 1783 states and 3378 transitions. [2021-12-16 02:19:35,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 02:19:35,273 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 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 34 [2021-12-16 02:19:35,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:19:35,287 INFO L225 Difference]: With dead ends: 1783 [2021-12-16 02:19:35,287 INFO L226 Difference]: Without dead ends: 845 [2021-12-16 02:19:35,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 02:19:35,295 INFO L933 BasicCegarLoop]: 1656 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1656 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:19:35,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1656 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:19:35,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2021-12-16 02:19:35,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 845. [2021-12-16 02:19:35,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 843 states have (on average 1.8884934756820877) internal successors, (1592), 844 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:35,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 1592 transitions. [2021-12-16 02:19:35,360 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 1592 transitions. Word has length 34 [2021-12-16 02:19:35,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:19:35,361 INFO L470 AbstractCegarLoop]: Abstraction has 845 states and 1592 transitions. [2021-12-16 02:19:35,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:35,361 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 1592 transitions. [2021-12-16 02:19:35,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-16 02:19:35,367 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:19:35,367 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:19:35,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 02:19:35,367 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:19:35,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:19:35,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1592898568, now seen corresponding path program 1 times [2021-12-16 02:19:35,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:19:35,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700844512] [2021-12-16 02:19:35,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:19:35,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:19:35,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:19:35,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:19:35,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:19:35,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700844512] [2021-12-16 02:19:35,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700844512] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:19:35,516 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:19:35,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 02:19:35,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116722360] [2021-12-16 02:19:35,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:19:35,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 02:19:35,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:19:35,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 02:19:35,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 02:19:35,519 INFO L87 Difference]: Start difference. First operand 845 states and 1592 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:35,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:19:35,600 INFO L93 Difference]: Finished difference Result 903 states and 1681 transitions. [2021-12-16 02:19:35,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 02:19:35,601 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 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 34 [2021-12-16 02:19:35,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:19:35,603 INFO L225 Difference]: With dead ends: 903 [2021-12-16 02:19:35,603 INFO L226 Difference]: Without dead ends: 845 [2021-12-16 02:19:35,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:19:35,605 INFO L933 BasicCegarLoop]: 1590 mSDtfsCounter, 3 mSDsluCounter, 4736 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6326 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:19:35,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6326 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:19:35,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2021-12-16 02:19:35,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 845. [2021-12-16 02:19:35,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 843 states have (on average 1.8517200474495847) internal successors, (1561), 844 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:35,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 1561 transitions. [2021-12-16 02:19:35,668 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 1561 transitions. Word has length 34 [2021-12-16 02:19:35,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:19:35,669 INFO L470 AbstractCegarLoop]: Abstraction has 845 states and 1561 transitions. [2021-12-16 02:19:35,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:35,669 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 1561 transitions. [2021-12-16 02:19:35,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-16 02:19:35,670 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:19:35,670 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:19:35,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 02:19:35,671 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:19:35,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:19:35,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1965655604, now seen corresponding path program 1 times [2021-12-16 02:19:35,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:19:35,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118336597] [2021-12-16 02:19:35,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:19:35,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:19:35,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:19:35,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:19:35,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:19:35,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118336597] [2021-12-16 02:19:35,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118336597] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:19:35,759 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:19:35,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 02:19:35,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222822025] [2021-12-16 02:19:35,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:19:35,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 02:19:35,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:19:35,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 02:19:35,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 02:19:35,763 INFO L87 Difference]: Start difference. First operand 845 states and 1561 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:40,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:19:40,703 INFO L93 Difference]: Finished difference Result 3100 states and 5870 transitions. [2021-12-16 02:19:40,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 02:19:40,704 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 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 63 [2021-12-16 02:19:40,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:19:40,711 INFO L225 Difference]: With dead ends: 3100 [2021-12-16 02:19:40,711 INFO L226 Difference]: Without dead ends: 2347 [2021-12-16 02:19:40,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 02:19:40,712 INFO L933 BasicCegarLoop]: 815 mSDtfsCounter, 2419 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 5518 mSolverCounterSat, 1100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2419 SdHoareTripleChecker+Valid, 833 SdHoareTripleChecker+Invalid, 6618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1100 IncrementalHoareTripleChecker+Valid, 5518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-12-16 02:19:40,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2419 Valid, 833 Invalid, 6618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1100 Valid, 5518 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2021-12-16 02:19:40,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2347 states. [2021-12-16 02:19:40,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2347 to 2347. [2021-12-16 02:19:40,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2347 states, 2345 states have (on average 1.5722814498933901) internal successors, (3687), 2346 states have internal predecessors, (3687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:40,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2347 states to 2347 states and 3687 transitions. [2021-12-16 02:19:40,745 INFO L78 Accepts]: Start accepts. Automaton has 2347 states and 3687 transitions. Word has length 63 [2021-12-16 02:19:40,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:19:40,746 INFO L470 AbstractCegarLoop]: Abstraction has 2347 states and 3687 transitions. [2021-12-16 02:19:40,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:40,746 INFO L276 IsEmpty]: Start isEmpty. Operand 2347 states and 3687 transitions. [2021-12-16 02:19:40,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-16 02:19:40,747 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:19:40,747 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:19:40,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 02:19:40,748 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:19:40,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:19:40,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1337087153, now seen corresponding path program 1 times [2021-12-16 02:19:40,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:19:40,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613545496] [2021-12-16 02:19:40,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:19:40,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:19:40,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:19:40,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:19:40,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:19:40,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613545496] [2021-12-16 02:19:40,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613545496] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:19:40,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:19:40,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 02:19:40,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310875808] [2021-12-16 02:19:40,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:19:40,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:19:40,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:19:40,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:19:40,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:19:40,802 INFO L87 Difference]: Start difference. First operand 2347 states and 3687 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:40,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:19:40,825 INFO L93 Difference]: Finished difference Result 2449 states and 3847 transitions. [2021-12-16 02:19:40,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:19:40,825 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 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 64 [2021-12-16 02:19:40,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:19:40,832 INFO L225 Difference]: With dead ends: 2449 [2021-12-16 02:19:40,832 INFO L226 Difference]: Without dead ends: 2395 [2021-12-16 02:19:40,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:19:40,834 INFO L933 BasicCegarLoop]: 1577 mSDtfsCounter, 1498 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1498 SdHoareTripleChecker+Valid, 1676 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:19:40,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1498 Valid, 1676 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:19:40,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2395 states. [2021-12-16 02:19:40,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2395 to 2393. [2021-12-16 02:19:40,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2393 states, 2391 states have (on average 1.5725637808448347) internal successors, (3760), 2392 states have internal predecessors, (3760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:40,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2393 states to 2393 states and 3760 transitions. [2021-12-16 02:19:40,868 INFO L78 Accepts]: Start accepts. Automaton has 2393 states and 3760 transitions. Word has length 64 [2021-12-16 02:19:40,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:19:40,869 INFO L470 AbstractCegarLoop]: Abstraction has 2393 states and 3760 transitions. [2021-12-16 02:19:40,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:40,869 INFO L276 IsEmpty]: Start isEmpty. Operand 2393 states and 3760 transitions. [2021-12-16 02:19:40,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-16 02:19:40,870 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:19:40,870 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:19:40,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 02:19:40,871 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:19:40,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:19:40,871 INFO L85 PathProgramCache]: Analyzing trace with hash -119101755, now seen corresponding path program 1 times [2021-12-16 02:19:40,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:19:40,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245334916] [2021-12-16 02:19:40,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:19:40,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:19:40,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:19:40,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:19:40,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:19:40,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245334916] [2021-12-16 02:19:40,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245334916] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:19:40,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:19:40,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 02:19:40,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748217316] [2021-12-16 02:19:40,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:19:40,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 02:19:40,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:19:40,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 02:19:40,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:19:40,958 INFO L87 Difference]: Start difference. First operand 2393 states and 3760 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:41,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:19:41,123 INFO L93 Difference]: Finished difference Result 3393 states and 5340 transitions. [2021-12-16 02:19:41,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 02:19:41,123 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 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 64 [2021-12-16 02:19:41,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:19:41,134 INFO L225 Difference]: With dead ends: 3393 [2021-12-16 02:19:41,134 INFO L226 Difference]: Without dead ends: 3293 [2021-12-16 02:19:41,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-12-16 02:19:41,139 INFO L933 BasicCegarLoop]: 1555 mSDtfsCounter, 8419 mSDsluCounter, 908 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8419 SdHoareTripleChecker+Valid, 2463 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 02:19:41,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8419 Valid, 2463 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 02:19:41,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3293 states. [2021-12-16 02:19:41,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3293 to 2491. [2021-12-16 02:19:41,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2491 states, 2489 states have (on average 1.5721173161912414) internal successors, (3913), 2490 states have internal predecessors, (3913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:41,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2491 states to 2491 states and 3913 transitions. [2021-12-16 02:19:41,271 INFO L78 Accepts]: Start accepts. Automaton has 2491 states and 3913 transitions. Word has length 64 [2021-12-16 02:19:41,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:19:41,274 INFO L470 AbstractCegarLoop]: Abstraction has 2491 states and 3913 transitions. [2021-12-16 02:19:41,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:41,275 INFO L276 IsEmpty]: Start isEmpty. Operand 2491 states and 3913 transitions. [2021-12-16 02:19:41,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-16 02:19:41,276 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:19:41,276 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:19:41,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-16 02:19:41,277 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:19:41,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:19:41,282 INFO L85 PathProgramCache]: Analyzing trace with hash 91634997, now seen corresponding path program 1 times [2021-12-16 02:19:41,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:19:41,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620170459] [2021-12-16 02:19:41,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:19:41,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:19:41,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:19:41,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:19:41,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:19:41,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620170459] [2021-12-16 02:19:41,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620170459] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:19:41,394 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:19:41,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 02:19:41,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755826082] [2021-12-16 02:19:41,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:19:41,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:19:41,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:19:41,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:19:41,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:19:41,396 INFO L87 Difference]: Start difference. First operand 2491 states and 3913 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:41,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:19:41,454 INFO L93 Difference]: Finished difference Result 2865 states and 4497 transitions. [2021-12-16 02:19:41,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:19:41,467 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 66 [2021-12-16 02:19:41,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:19:41,475 INFO L225 Difference]: With dead ends: 2865 [2021-12-16 02:19:41,476 INFO L226 Difference]: Without dead ends: 2667 [2021-12-16 02:19:41,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:19:41,480 INFO L933 BasicCegarLoop]: 1557 mSDtfsCounter, 1489 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1489 SdHoareTripleChecker+Valid, 1635 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:19:41,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1489 Valid, 1635 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:19:41,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2667 states. [2021-12-16 02:19:41,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2667 to 2661. [2021-12-16 02:19:41,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2661 states, 2659 states have (on average 1.5686348251222264) internal successors, (4171), 2660 states have internal predecessors, (4171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:41,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2661 states to 2661 states and 4171 transitions. [2021-12-16 02:19:41,548 INFO L78 Accepts]: Start accepts. Automaton has 2661 states and 4171 transitions. Word has length 66 [2021-12-16 02:19:41,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:19:41,548 INFO L470 AbstractCegarLoop]: Abstraction has 2661 states and 4171 transitions. [2021-12-16 02:19:41,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:41,548 INFO L276 IsEmpty]: Start isEmpty. Operand 2661 states and 4171 transitions. [2021-12-16 02:19:41,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-16 02:19:41,550 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:19:41,550 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:19:41,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-16 02:19:41,551 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:19:41,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:19:41,551 INFO L85 PathProgramCache]: Analyzing trace with hash 158128509, now seen corresponding path program 1 times [2021-12-16 02:19:41,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:19:41,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120508893] [2021-12-16 02:19:41,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:19:41,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:19:41,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:19:41,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:19:41,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:19:41,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120508893] [2021-12-16 02:19:41,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120508893] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:19:41,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:19:41,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 02:19:41,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112648636] [2021-12-16 02:19:41,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:19:41,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 02:19:41,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:19:41,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 02:19:41,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:19:41,722 INFO L87 Difference]: Start difference. First operand 2661 states and 4171 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:41,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:19:41,875 INFO L93 Difference]: Finished difference Result 3031 states and 4741 transitions. [2021-12-16 02:19:41,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 02:19:41,875 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 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 66 [2021-12-16 02:19:41,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:19:41,883 INFO L225 Difference]: With dead ends: 3031 [2021-12-16 02:19:41,883 INFO L226 Difference]: Without dead ends: 2663 [2021-12-16 02:19:41,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-12-16 02:19:41,887 INFO L933 BasicCegarLoop]: 1568 mSDtfsCounter, 4663 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4663 SdHoareTripleChecker+Valid, 1899 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:19:41,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4663 Valid, 1899 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:19:41,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2663 states. [2021-12-16 02:19:41,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2663 to 2661. [2021-12-16 02:19:41,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2661 states, 2659 states have (on average 1.5671305001880407) internal successors, (4167), 2660 states have internal predecessors, (4167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:41,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2661 states to 2661 states and 4167 transitions. [2021-12-16 02:19:41,929 INFO L78 Accepts]: Start accepts. Automaton has 2661 states and 4167 transitions. Word has length 66 [2021-12-16 02:19:41,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:19:41,930 INFO L470 AbstractCegarLoop]: Abstraction has 2661 states and 4167 transitions. [2021-12-16 02:19:41,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:41,931 INFO L276 IsEmpty]: Start isEmpty. Operand 2661 states and 4167 transitions. [2021-12-16 02:19:41,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-16 02:19:41,931 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:19:41,931 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:19:41,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-16 02:19:41,932 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:19:41,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:19:41,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1100417095, now seen corresponding path program 1 times [2021-12-16 02:19:41,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:19:41,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549824161] [2021-12-16 02:19:41,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:19:41,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:19:41,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:19:41,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:19:41,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:19:41,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549824161] [2021-12-16 02:19:41,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549824161] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:19:41,962 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:19:41,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 02:19:41,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905769302] [2021-12-16 02:19:41,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:19:41,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:19:41,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:19:41,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:19:41,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:19:41,964 INFO L87 Difference]: Start difference. First operand 2661 states and 4167 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:42,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:19:42,004 INFO L93 Difference]: Finished difference Result 3349 states and 5217 transitions. [2021-12-16 02:19:42,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:19:42,004 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 66 [2021-12-16 02:19:42,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:19:42,012 INFO L225 Difference]: With dead ends: 3349 [2021-12-16 02:19:42,012 INFO L226 Difference]: Without dead ends: 2981 [2021-12-16 02:19:42,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:19:42,014 INFO L933 BasicCegarLoop]: 1591 mSDtfsCounter, 1502 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1502 SdHoareTripleChecker+Valid, 1686 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:19:42,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1502 Valid, 1686 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:19:42,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2981 states. [2021-12-16 02:19:42,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2981 to 2979. [2021-12-16 02:19:42,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2979 states, 2977 states have (on average 1.559623782331206) internal successors, (4643), 2978 states have internal predecessors, (4643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:42,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2979 states to 2979 states and 4643 transitions. [2021-12-16 02:19:42,073 INFO L78 Accepts]: Start accepts. Automaton has 2979 states and 4643 transitions. Word has length 66 [2021-12-16 02:19:42,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:19:42,073 INFO L470 AbstractCegarLoop]: Abstraction has 2979 states and 4643 transitions. [2021-12-16 02:19:42,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:42,073 INFO L276 IsEmpty]: Start isEmpty. Operand 2979 states and 4643 transitions. [2021-12-16 02:19:42,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-16 02:19:42,075 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:19:42,075 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:19:42,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-16 02:19:42,075 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:19:42,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:19:42,076 INFO L85 PathProgramCache]: Analyzing trace with hash -826729383, now seen corresponding path program 1 times [2021-12-16 02:19:42,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:19:42,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674049162] [2021-12-16 02:19:42,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:19:42,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:19:42,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:19:42,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:19:42,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:19:42,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674049162] [2021-12-16 02:19:42,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674049162] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:19:42,114 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:19:42,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 02:19:42,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247369459] [2021-12-16 02:19:42,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:19:42,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:19:42,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:19:42,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:19:42,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:19:42,116 INFO L87 Difference]: Start difference. First operand 2979 states and 4643 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:42,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:19:42,164 INFO L93 Difference]: Finished difference Result 4255 states and 6565 transitions. [2021-12-16 02:19:42,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:19:42,165 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 66 [2021-12-16 02:19:42,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:19:42,174 INFO L225 Difference]: With dead ends: 4255 [2021-12-16 02:19:42,175 INFO L226 Difference]: Without dead ends: 3569 [2021-12-16 02:19:42,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:19:42,178 INFO L933 BasicCegarLoop]: 1604 mSDtfsCounter, 1506 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1506 SdHoareTripleChecker+Valid, 1695 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:19:42,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1506 Valid, 1695 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:19:42,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3569 states. [2021-12-16 02:19:42,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3569 to 3567. [2021-12-16 02:19:42,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3567 states, 3565 states have (on average 1.544740532959327) internal successors, (5507), 3566 states have internal predecessors, (5507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:42,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3567 states to 3567 states and 5507 transitions. [2021-12-16 02:19:42,245 INFO L78 Accepts]: Start accepts. Automaton has 3567 states and 5507 transitions. Word has length 66 [2021-12-16 02:19:42,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:19:42,246 INFO L470 AbstractCegarLoop]: Abstraction has 3567 states and 5507 transitions. [2021-12-16 02:19:42,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:42,246 INFO L276 IsEmpty]: Start isEmpty. Operand 3567 states and 5507 transitions. [2021-12-16 02:19:42,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-16 02:19:42,246 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:19:42,247 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:19:42,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-16 02:19:42,249 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:19:42,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:19:42,250 INFO L85 PathProgramCache]: Analyzing trace with hash 992342265, now seen corresponding path program 1 times [2021-12-16 02:19:42,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:19:42,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992539148] [2021-12-16 02:19:42,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:19:42,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:19:42,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:19:42,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:19:42,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:19:42,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992539148] [2021-12-16 02:19:42,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992539148] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:19:42,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:19:42,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 02:19:42,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065397171] [2021-12-16 02:19:42,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:19:42,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:19:42,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:19:42,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:19:42,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:19:42,283 INFO L87 Difference]: Start difference. First operand 3567 states and 5507 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:42,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:19:42,361 INFO L93 Difference]: Finished difference Result 5923 states and 8997 transitions. [2021-12-16 02:19:42,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:19:42,362 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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 66 [2021-12-16 02:19:42,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:19:42,383 INFO L225 Difference]: With dead ends: 5923 [2021-12-16 02:19:42,383 INFO L226 Difference]: Without dead ends: 4649 [2021-12-16 02:19:42,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:19:42,386 INFO L933 BasicCegarLoop]: 1617 mSDtfsCounter, 1510 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1510 SdHoareTripleChecker+Valid, 1704 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:19:42,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1510 Valid, 1704 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:19:42,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4649 states. [2021-12-16 02:19:42,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4649 to 4647. [2021-12-16 02:19:42,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4647 states, 4645 states have (on average 1.5196986006458557) internal successors, (7059), 4646 states have internal predecessors, (7059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:42,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4647 states to 4647 states and 7059 transitions. [2021-12-16 02:19:42,570 INFO L78 Accepts]: Start accepts. Automaton has 4647 states and 7059 transitions. Word has length 66 [2021-12-16 02:19:42,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:19:42,570 INFO L470 AbstractCegarLoop]: Abstraction has 4647 states and 7059 transitions. [2021-12-16 02:19:42,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:42,571 INFO L276 IsEmpty]: Start isEmpty. Operand 4647 states and 7059 transitions. [2021-12-16 02:19:42,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-16 02:19:42,572 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:19:42,572 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:19:42,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-16 02:19:42,572 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:19:42,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:19:42,573 INFO L85 PathProgramCache]: Analyzing trace with hash 192293446, now seen corresponding path program 1 times [2021-12-16 02:19:42,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:19:42,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831648160] [2021-12-16 02:19:42,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:19:42,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:19:42,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:19:42,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:19:42,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:19:42,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831648160] [2021-12-16 02:19:42,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831648160] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:19:42,658 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:19:42,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-16 02:19:42,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33567190] [2021-12-16 02:19:42,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:19:42,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 02:19:42,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:19:42,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 02:19:42,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:19:42,661 INFO L87 Difference]: Start difference. First operand 4647 states and 7059 transitions. Second operand has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:42,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:19:42,875 INFO L93 Difference]: Finished difference Result 6405 states and 9593 transitions. [2021-12-16 02:19:42,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 02:19:42,875 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 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 67 [2021-12-16 02:19:42,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:19:42,887 INFO L225 Difference]: With dead ends: 6405 [2021-12-16 02:19:42,887 INFO L226 Difference]: Without dead ends: 6403 [2021-12-16 02:19:42,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-16 02:19:42,890 INFO L933 BasicCegarLoop]: 1603 mSDtfsCounter, 600 mSDsluCounter, 9089 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 10692 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:19:42,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 10692 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:19:42,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6403 states. [2021-12-16 02:19:43,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6403 to 4743. [2021-12-16 02:19:43,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4743 states, 4741 states have (on average 1.505800464037123) internal successors, (7139), 4742 states have internal predecessors, (7139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:43,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4743 states to 4743 states and 7139 transitions. [2021-12-16 02:19:43,033 INFO L78 Accepts]: Start accepts. Automaton has 4743 states and 7139 transitions. Word has length 67 [2021-12-16 02:19:43,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:19:43,034 INFO L470 AbstractCegarLoop]: Abstraction has 4743 states and 7139 transitions. [2021-12-16 02:19:43,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.375) internal successors, (67), 8 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:43,034 INFO L276 IsEmpty]: Start isEmpty. Operand 4743 states and 7139 transitions. [2021-12-16 02:19:43,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-16 02:19:43,035 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:19:43,035 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:19:43,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-16 02:19:43,036 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:19:43,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:19:43,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1338319212, now seen corresponding path program 1 times [2021-12-16 02:19:43,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:19:43,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567269671] [2021-12-16 02:19:43,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:19:43,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:19:43,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:19:43,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:19:43,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:19:43,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567269671] [2021-12-16 02:19:43,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567269671] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:19:43,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:19:43,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 02:19:43,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273243320] [2021-12-16 02:19:43,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:19:43,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:19:43,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:19:43,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:19:43,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:19:43,059 INFO L87 Difference]: Start difference. First operand 4743 states and 7139 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:43,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:19:43,197 INFO L93 Difference]: Finished difference Result 7246 states and 10793 transitions. [2021-12-16 02:19:43,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:19:43,198 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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 68 [2021-12-16 02:19:43,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:19:43,207 INFO L225 Difference]: With dead ends: 7246 [2021-12-16 02:19:43,207 INFO L226 Difference]: Without dead ends: 5867 [2021-12-16 02:19:43,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:19:43,210 INFO L933 BasicCegarLoop]: 1625 mSDtfsCounter, 1511 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1511 SdHoareTripleChecker+Valid, 1708 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:19:43,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1511 Valid, 1708 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:19:43,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5867 states. [2021-12-16 02:19:43,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5867 to 5865. [2021-12-16 02:19:43,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5865 states, 5863 states have (on average 1.4881460003411222) internal successors, (8725), 5864 states have internal predecessors, (8725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:43,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5865 states to 5865 states and 8725 transitions. [2021-12-16 02:19:43,462 INFO L78 Accepts]: Start accepts. Automaton has 5865 states and 8725 transitions. Word has length 68 [2021-12-16 02:19:43,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:19:43,462 INFO L470 AbstractCegarLoop]: Abstraction has 5865 states and 8725 transitions. [2021-12-16 02:19:43,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:43,463 INFO L276 IsEmpty]: Start isEmpty. Operand 5865 states and 8725 transitions. [2021-12-16 02:19:43,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-16 02:19:43,465 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:19:43,466 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:19:43,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-16 02:19:43,466 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:19:43,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:19:43,467 INFO L85 PathProgramCache]: Analyzing trace with hash -482219864, now seen corresponding path program 1 times [2021-12-16 02:19:43,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:19:43,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368932990] [2021-12-16 02:19:43,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:19:43,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:19:43,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:19:43,530 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 02:19:43,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:19:43,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368932990] [2021-12-16 02:19:43,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368932990] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:19:43,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:19:43,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 02:19:43,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633337964] [2021-12-16 02:19:43,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:19:43,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 02:19:43,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:19:43,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 02:19:43,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:19:43,533 INFO L87 Difference]: Start difference. First operand 5865 states and 8725 transitions. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:44,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:19:44,298 INFO L93 Difference]: Finished difference Result 24437 states and 35323 transitions. [2021-12-16 02:19:44,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 02:19:44,299 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 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 95 [2021-12-16 02:19:44,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:19:44,333 INFO L225 Difference]: With dead ends: 24437 [2021-12-16 02:19:44,333 INFO L226 Difference]: Without dead ends: 20867 [2021-12-16 02:19:44,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-16 02:19:44,345 INFO L933 BasicCegarLoop]: 1635 mSDtfsCounter, 6639 mSDsluCounter, 1950 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6639 SdHoareTripleChecker+Valid, 3585 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:19:44,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6639 Valid, 3585 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:19:44,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20867 states. [2021-12-16 02:19:44,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20867 to 9433. [2021-12-16 02:19:44,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9433 states, 9431 states have (on average 1.4629413635881667) internal successors, (13797), 9432 states have internal predecessors, (13797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:44,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9433 states to 9433 states and 13797 transitions. [2021-12-16 02:19:44,709 INFO L78 Accepts]: Start accepts. Automaton has 9433 states and 13797 transitions. Word has length 95 [2021-12-16 02:19:44,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:19:44,710 INFO L470 AbstractCegarLoop]: Abstraction has 9433 states and 13797 transitions. [2021-12-16 02:19:44,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:44,710 INFO L276 IsEmpty]: Start isEmpty. Operand 9433 states and 13797 transitions. [2021-12-16 02:19:44,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-16 02:19:44,712 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:19:44,712 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-16 02:19:44,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-16 02:19:44,713 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:19:44,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:19:44,713 INFO L85 PathProgramCache]: Analyzing trace with hash -452697646, now seen corresponding path program 1 times [2021-12-16 02:19:44,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:19:44,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814274112] [2021-12-16 02:19:44,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:19:44,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:19:44,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:19:44,770 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-16 02:19:44,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:19:44,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814274112] [2021-12-16 02:19:44,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814274112] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:19:44,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:19:44,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 02:19:44,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434652024] [2021-12-16 02:19:44,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:19:44,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 02:19:44,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:19:44,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 02:19:44,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:19:44,772 INFO L87 Difference]: Start difference. First operand 9433 states and 13797 transitions. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:45,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:19:45,552 INFO L93 Difference]: Finished difference Result 28005 states and 40395 transitions. [2021-12-16 02:19:45,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 02:19:45,553 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 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 95 [2021-12-16 02:19:45,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:19:45,592 INFO L225 Difference]: With dead ends: 28005 [2021-12-16 02:19:45,592 INFO L226 Difference]: Without dead ends: 24435 [2021-12-16 02:19:45,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-16 02:19:45,606 INFO L933 BasicCegarLoop]: 1637 mSDtfsCounter, 6527 mSDsluCounter, 2007 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6527 SdHoareTripleChecker+Valid, 3644 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:19:45,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6527 Valid, 3644 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:19:45,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24435 states. [2021-12-16 02:19:46,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24435 to 14793. [2021-12-16 02:19:46,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14793 states, 14791 states have (on average 1.4444594685957677) internal successors, (21365), 14792 states have internal predecessors, (21365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:46,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14793 states to 14793 states and 21365 transitions. [2021-12-16 02:19:46,296 INFO L78 Accepts]: Start accepts. Automaton has 14793 states and 21365 transitions. Word has length 95 [2021-12-16 02:19:46,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:19:46,297 INFO L470 AbstractCegarLoop]: Abstraction has 14793 states and 21365 transitions. [2021-12-16 02:19:46,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:46,297 INFO L276 IsEmpty]: Start isEmpty. Operand 14793 states and 21365 transitions. [2021-12-16 02:19:46,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-16 02:19:46,300 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:19:46,300 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-16 02:19:46,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-16 02:19:46,300 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:19:46,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:19:46,301 INFO L85 PathProgramCache]: Analyzing trace with hash -179009934, now seen corresponding path program 1 times [2021-12-16 02:19:46,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:19:46,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714608926] [2021-12-16 02:19:46,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:19:46,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:19:46,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:19:46,360 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-16 02:19:46,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:19:46,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714608926] [2021-12-16 02:19:46,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714608926] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:19:46,361 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:19:46,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 02:19:46,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739984774] [2021-12-16 02:19:46,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:19:46,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 02:19:46,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:19:46,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 02:19:46,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:19:46,362 INFO L87 Difference]: Start difference. First operand 14793 states and 21365 transitions. Second operand has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:47,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:19:47,430 INFO L93 Difference]: Finished difference Result 31573 states and 45467 transitions. [2021-12-16 02:19:47,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 02:19:47,431 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 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 95 [2021-12-16 02:19:47,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:19:47,478 INFO L225 Difference]: With dead ends: 31573 [2021-12-16 02:19:47,478 INFO L226 Difference]: Without dead ends: 28003 [2021-12-16 02:19:47,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-16 02:19:47,491 INFO L933 BasicCegarLoop]: 1637 mSDtfsCounter, 6537 mSDsluCounter, 2039 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6537 SdHoareTripleChecker+Valid, 3676 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:19:47,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6537 Valid, 3676 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:19:47,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28003 states. [2021-12-16 02:19:48,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28003 to 18361. [2021-12-16 02:19:48,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18361 states, 18359 states have (on average 1.4400021787679067) internal successors, (26437), 18360 states have internal predecessors, (26437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:48,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18361 states to 18361 states and 26437 transitions. [2021-12-16 02:19:48,367 INFO L78 Accepts]: Start accepts. Automaton has 18361 states and 26437 transitions. Word has length 95 [2021-12-16 02:19:48,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:19:48,367 INFO L470 AbstractCegarLoop]: Abstraction has 18361 states and 26437 transitions. [2021-12-16 02:19:48,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:48,368 INFO L276 IsEmpty]: Start isEmpty. Operand 18361 states and 26437 transitions. [2021-12-16 02:19:48,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-16 02:19:48,371 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:19:48,371 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-16 02:19:48,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-16 02:19:48,371 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:19:48,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:19:48,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1640061714, now seen corresponding path program 1 times [2021-12-16 02:19:48,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:19:48,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627654938] [2021-12-16 02:19:48,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:19:48,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:19:48,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:19:48,424 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-16 02:19:48,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:19:48,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627654938] [2021-12-16 02:19:48,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627654938] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:19:48,426 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:19:48,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 02:19:48,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978603673] [2021-12-16 02:19:48,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:19:48,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 02:19:48,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:19:48,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 02:19:48,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:19:48,427 INFO L87 Difference]: Start difference. First operand 18361 states and 26437 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:49,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:19:49,496 INFO L93 Difference]: Finished difference Result 35141 states and 50539 transitions. [2021-12-16 02:19:49,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 02:19:49,497 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 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 95 [2021-12-16 02:19:49,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:19:49,543 INFO L225 Difference]: With dead ends: 35141 [2021-12-16 02:19:49,543 INFO L226 Difference]: Without dead ends: 31571 [2021-12-16 02:19:49,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-16 02:19:49,556 INFO L933 BasicCegarLoop]: 1635 mSDtfsCounter, 6608 mSDsluCounter, 2005 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6608 SdHoareTripleChecker+Valid, 3640 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:19:49,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6608 Valid, 3640 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:19:49,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31571 states. [2021-12-16 02:19:50,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31571 to 21929. [2021-12-16 02:19:50,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21929 states, 21927 states have (on average 1.4369954850184703) internal successors, (31509), 21928 states have internal predecessors, (31509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:50,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21929 states to 21929 states and 31509 transitions. [2021-12-16 02:19:50,519 INFO L78 Accepts]: Start accepts. Automaton has 21929 states and 31509 transitions. Word has length 95 [2021-12-16 02:19:50,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:19:50,519 INFO L470 AbstractCegarLoop]: Abstraction has 21929 states and 31509 transitions. [2021-12-16 02:19:50,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:50,519 INFO L276 IsEmpty]: Start isEmpty. Operand 21929 states and 31509 transitions. [2021-12-16 02:19:50,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-16 02:19:50,527 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:19:50,527 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:19:50,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-16 02:19:50,527 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:19:50,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:19:50,528 INFO L85 PathProgramCache]: Analyzing trace with hash -906023264, now seen corresponding path program 1 times [2021-12-16 02:19:50,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:19:50,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261231847] [2021-12-16 02:19:50,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:19:50,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:19:50,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:19:50,565 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:19:50,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:19:50,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261231847] [2021-12-16 02:19:50,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261231847] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:19:50,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:19:50,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 02:19:50,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073863960] [2021-12-16 02:19:50,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:19:50,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:19:50,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:19:50,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:19:50,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:19:50,568 INFO L87 Difference]: Start difference. First operand 21929 states and 31509 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:51,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:19:51,113 INFO L93 Difference]: Finished difference Result 35691 states and 51259 transitions. [2021-12-16 02:19:51,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:19:51,114 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 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 97 [2021-12-16 02:19:51,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:19:51,140 INFO L225 Difference]: With dead ends: 35691 [2021-12-16 02:19:51,140 INFO L226 Difference]: Without dead ends: 16057 [2021-12-16 02:19:51,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:19:51,164 INFO L933 BasicCegarLoop]: 1601 mSDtfsCounter, 54 mSDsluCounter, 1545 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 3146 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:19:51,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 3146 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:19:51,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16057 states. [2021-12-16 02:19:51,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16057 to 16055. [2021-12-16 02:19:51,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16055 states, 16053 states have (on average 1.4437176851678815) internal successors, (23176), 16054 states have internal predecessors, (23176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:51,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16055 states to 16055 states and 23176 transitions. [2021-12-16 02:19:51,895 INFO L78 Accepts]: Start accepts. Automaton has 16055 states and 23176 transitions. Word has length 97 [2021-12-16 02:19:51,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:19:51,895 INFO L470 AbstractCegarLoop]: Abstraction has 16055 states and 23176 transitions. [2021-12-16 02:19:51,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:51,896 INFO L276 IsEmpty]: Start isEmpty. Operand 16055 states and 23176 transitions. [2021-12-16 02:19:51,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-16 02:19:51,899 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:19:51,899 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-16 02:19:51,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-16 02:19:51,900 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:19:51,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:19:51,900 INFO L85 PathProgramCache]: Analyzing trace with hash -615309075, now seen corresponding path program 1 times [2021-12-16 02:19:51,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:19:51,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115039086] [2021-12-16 02:19:51,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:19:51,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:19:51,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:19:51,950 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 02:19:51,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:19:51,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115039086] [2021-12-16 02:19:51,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115039086] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:19:51,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:19:51,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 02:19:51,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285145764] [2021-12-16 02:19:51,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:19:51,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 02:19:51,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:19:51,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 02:19:51,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:19:51,952 INFO L87 Difference]: Start difference. First operand 16055 states and 23176 transitions. Second operand has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:53,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:19:53,153 INFO L93 Difference]: Finished difference Result 28547 states and 41102 transitions. [2021-12-16 02:19:53,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 02:19:53,154 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 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 97 [2021-12-16 02:19:53,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:19:53,195 INFO L225 Difference]: With dead ends: 28547 [2021-12-16 02:19:53,195 INFO L226 Difference]: Without dead ends: 26049 [2021-12-16 02:19:53,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-16 02:19:53,208 INFO L933 BasicCegarLoop]: 1634 mSDtfsCounter, 6588 mSDsluCounter, 1974 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6588 SdHoareTripleChecker+Valid, 3608 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:19:53,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6588 Valid, 3608 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:19:53,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26049 states. [2021-12-16 02:19:54,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26049 to 18551. [2021-12-16 02:19:54,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18551 states, 18549 states have (on average 1.4409402124103725) internal successors, (26728), 18550 states have internal predecessors, (26728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:54,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18551 states to 18551 states and 26728 transitions. [2021-12-16 02:19:54,074 INFO L78 Accepts]: Start accepts. Automaton has 18551 states and 26728 transitions. Word has length 97 [2021-12-16 02:19:54,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:19:54,074 INFO L470 AbstractCegarLoop]: Abstraction has 18551 states and 26728 transitions. [2021-12-16 02:19:54,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:54,075 INFO L276 IsEmpty]: Start isEmpty. Operand 18551 states and 26728 transitions. [2021-12-16 02:19:54,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-16 02:19:54,078 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:19:54,078 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-16 02:19:54,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-16 02:19:54,079 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:19:54,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:19:54,079 INFO L85 PathProgramCache]: Analyzing trace with hash -605888281, now seen corresponding path program 1 times [2021-12-16 02:19:54,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:19:54,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86791555] [2021-12-16 02:19:54,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:19:54,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:19:54,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:19:54,106 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:19:54,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:19:54,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86791555] [2021-12-16 02:19:54,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86791555] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:19:54,107 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:19:54,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 02:19:54,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993941415] [2021-12-16 02:19:54,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:19:54,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:19:54,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:19:54,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:19:54,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:19:54,108 INFO L87 Difference]: Start difference. First operand 18551 states and 26728 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:54,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:19:54,464 INFO L93 Difference]: Finished difference Result 26667 states and 38274 transitions. [2021-12-16 02:19:54,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:19:54,465 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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 98 [2021-12-16 02:19:54,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:19:54,479 INFO L225 Difference]: With dead ends: 26667 [2021-12-16 02:19:54,479 INFO L226 Difference]: Without dead ends: 10441 [2021-12-16 02:19:54,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:19:54,495 INFO L933 BasicCegarLoop]: 1594 mSDtfsCounter, 48 mSDsluCounter, 1537 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 3131 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:19:54,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 3131 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:19:54,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10441 states. [2021-12-16 02:19:54,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10441 to 10439. [2021-12-16 02:19:54,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10439 states, 10437 states have (on average 1.4448596339944428) internal successors, (15080), 10438 states have internal predecessors, (15080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:54,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10439 states to 10439 states and 15080 transitions. [2021-12-16 02:19:54,862 INFO L78 Accepts]: Start accepts. Automaton has 10439 states and 15080 transitions. Word has length 98 [2021-12-16 02:19:54,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:19:54,863 INFO L470 AbstractCegarLoop]: Abstraction has 10439 states and 15080 transitions. [2021-12-16 02:19:54,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:54,863 INFO L276 IsEmpty]: Start isEmpty. Operand 10439 states and 15080 transitions. [2021-12-16 02:19:54,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-16 02:19:54,865 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:19:54,865 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-16 02:19:54,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-16 02:19:54,865 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:19:54,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:19:54,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1773467421, now seen corresponding path program 1 times [2021-12-16 02:19:54,866 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:19:54,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390503268] [2021-12-16 02:19:54,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:19:54,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:19:54,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:19:54,903 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:19:54,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:19:54,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390503268] [2021-12-16 02:19:54,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390503268] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:19:54,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:19:54,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 02:19:54,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464597398] [2021-12-16 02:19:54,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:19:54,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:19:54,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:19:54,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:19:54,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:19:54,905 INFO L87 Difference]: Start difference. First operand 10439 states and 15080 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:55,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:19:55,094 INFO L93 Difference]: Finished difference Result 14499 states and 20802 transitions. [2021-12-16 02:19:55,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:19:55,095 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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 98 [2021-12-16 02:19:55,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:19:55,102 INFO L225 Difference]: With dead ends: 14499 [2021-12-16 02:19:55,103 INFO L226 Difference]: Without dead ends: 6385 [2021-12-16 02:19:55,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:19:55,112 INFO L933 BasicCegarLoop]: 1587 mSDtfsCounter, 44 mSDsluCounter, 1529 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 3116 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:19:55,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 3116 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:19:55,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6385 states. [2021-12-16 02:19:55,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6385 to 6383. [2021-12-16 02:19:55,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6383 states, 6381 states have (on average 1.4587055320482682) internal successors, (9308), 6382 states have internal predecessors, (9308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:55,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6383 states to 6383 states and 9308 transitions. [2021-12-16 02:19:55,321 INFO L78 Accepts]: Start accepts. Automaton has 6383 states and 9308 transitions. Word has length 98 [2021-12-16 02:19:55,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:19:55,322 INFO L470 AbstractCegarLoop]: Abstraction has 6383 states and 9308 transitions. [2021-12-16 02:19:55,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:55,322 INFO L276 IsEmpty]: Start isEmpty. Operand 6383 states and 9308 transitions. [2021-12-16 02:19:55,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-16 02:19:55,324 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:19:55,324 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-16 02:19:55,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-16 02:19:55,324 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:19:55,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:19:55,324 INFO L85 PathProgramCache]: Analyzing trace with hash -934897581, now seen corresponding path program 1 times [2021-12-16 02:19:55,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:19:55,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444212456] [2021-12-16 02:19:55,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:19:55,325 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:19:55,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:19:55,365 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:19:55,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:19:55,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444212456] [2021-12-16 02:19:55,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444212456] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:19:55,366 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:19:55,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 02:19:55,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546705326] [2021-12-16 02:19:55,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:19:55,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:19:55,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:19:55,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:19:55,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:19:55,368 INFO L87 Difference]: Start difference. First operand 6383 states and 9308 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:55,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:19:55,494 INFO L93 Difference]: Finished difference Result 8415 states and 12144 transitions. [2021-12-16 02:19:55,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:19:55,495 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 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 98 [2021-12-16 02:19:55,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:19:55,501 INFO L225 Difference]: With dead ends: 8415 [2021-12-16 02:19:55,501 INFO L226 Difference]: Without dead ends: 4357 [2021-12-16 02:19:55,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 02:19:55,507 INFO L933 BasicCegarLoop]: 1580 mSDtfsCounter, 40 mSDsluCounter, 1521 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 3101 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:19:55,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 3101 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:19:55,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4357 states. [2021-12-16 02:19:55,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4357 to 4355. [2021-12-16 02:19:55,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4355 states, 4353 states have (on average 1.4812772800367562) internal successors, (6448), 4354 states have internal predecessors, (6448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:55,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4355 states to 4355 states and 6448 transitions. [2021-12-16 02:19:55,666 INFO L78 Accepts]: Start accepts. Automaton has 4355 states and 6448 transitions. Word has length 98 [2021-12-16 02:19:55,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:19:55,667 INFO L470 AbstractCegarLoop]: Abstraction has 4355 states and 6448 transitions. [2021-12-16 02:19:55,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:55,667 INFO L276 IsEmpty]: Start isEmpty. Operand 4355 states and 6448 transitions. [2021-12-16 02:19:55,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-16 02:19:55,668 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:19:55,668 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-16 02:19:55,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-16 02:19:55,668 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:19:55,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:19:55,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1022016375, now seen corresponding path program 1 times [2021-12-16 02:19:55,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:19:55,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770316070] [2021-12-16 02:19:55,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:19:55,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:19:55,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:19:55,831 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:19:55,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:19:55,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770316070] [2021-12-16 02:19:55,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770316070] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:19:55,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986971646] [2021-12-16 02:19:55,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:19:55,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:19:55,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:19:55,833 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:19:55,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 02:19:55,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:19:55,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 02:19:55,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:19:56,329 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 02:19:56,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:19:56,581 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-16 02:19:56,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986971646] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:19:56,581 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 02:19:56,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 14 [2021-12-16 02:19:56,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744839339] [2021-12-16 02:19:56,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 02:19:56,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 02:19:56,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:19:56,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 02:19:56,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-12-16 02:19:56,583 INFO L87 Difference]: Start difference. First operand 4355 states and 6448 transitions. Second operand has 14 states, 14 states have (on average 19.785714285714285) internal successors, (277), 14 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:19:59,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:19:59,680 INFO L93 Difference]: Finished difference Result 25977 states and 36062 transitions. [2021-12-16 02:19:59,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-12-16 02:19:59,680 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 19.785714285714285) internal successors, (277), 14 states have internal predecessors, (277), 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 98 [2021-12-16 02:19:59,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:19:59,714 INFO L225 Difference]: With dead ends: 25977 [2021-12-16 02:19:59,714 INFO L226 Difference]: Without dead ends: 23947 [2021-12-16 02:19:59,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1848 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1012, Invalid=4244, Unknown=0, NotChecked=0, Total=5256 [2021-12-16 02:19:59,727 INFO L933 BasicCegarLoop]: 1593 mSDtfsCounter, 15911 mSDsluCounter, 5470 mSDsCounter, 0 mSdLazyCounter, 1222 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15911 SdHoareTripleChecker+Valid, 7063 SdHoareTripleChecker+Invalid, 1365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-16 02:19:59,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15911 Valid, 7063 Invalid, 1365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1222 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-16 02:19:59,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23947 states. [2021-12-16 02:20:00,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23947 to 15707. [2021-12-16 02:20:00,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15707 states, 15705 states have (on average 1.3564469914040114) internal successors, (21303), 15706 states have internal predecessors, (21303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:20:00,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15707 states to 15707 states and 21303 transitions. [2021-12-16 02:20:00,568 INFO L78 Accepts]: Start accepts. Automaton has 15707 states and 21303 transitions. Word has length 98 [2021-12-16 02:20:00,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:20:00,568 INFO L470 AbstractCegarLoop]: Abstraction has 15707 states and 21303 transitions. [2021-12-16 02:20:00,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 19.785714285714285) internal successors, (277), 14 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:20:00,568 INFO L276 IsEmpty]: Start isEmpty. Operand 15707 states and 21303 transitions. [2021-12-16 02:20:00,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-16 02:20:00,569 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:20:00,570 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-16 02:20:00,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 02:20:00,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-16 02:20:00,788 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:20:00,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:20:00,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1125120587, now seen corresponding path program 1 times [2021-12-16 02:20:00,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:20:00,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519566624] [2021-12-16 02:20:00,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:20:00,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:20:00,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:20:00,908 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:20:00,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:20:00,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519566624] [2021-12-16 02:20:00,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519566624] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:20:00,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746921875] [2021-12-16 02:20:00,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:20:00,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:20:00,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:20:00,910 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:20:00,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 02:20:01,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:20:01,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-16 02:20:01,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:20:01,822 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:20:01,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:20:02,487 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:20:02,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746921875] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:20:02,488 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 02:20:02,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2021-12-16 02:20:02,488 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523326665] [2021-12-16 02:20:02,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 02:20:02,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-16 02:20:02,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:20:02,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-16 02:20:02,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-12-16 02:20:02,492 INFO L87 Difference]: Start difference. First operand 15707 states and 21303 transitions. Second operand has 23 states, 23 states have (on average 9.956521739130435) internal successors, (229), 22 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:20:07,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:20:07,306 INFO L93 Difference]: Finished difference Result 72588 states and 95848 transitions. [2021-12-16 02:20:07,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-16 02:20:07,307 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 9.956521739130435) internal successors, (229), 22 states have internal predecessors, (229), 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 99 [2021-12-16 02:20:07,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:20:07,425 INFO L225 Difference]: With dead ends: 72588 [2021-12-16 02:20:07,425 INFO L226 Difference]: Without dead ends: 59691 [2021-12-16 02:20:07,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 183 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=464, Invalid=1342, Unknown=0, NotChecked=0, Total=1806 [2021-12-16 02:20:07,451 INFO L933 BasicCegarLoop]: 1557 mSDtfsCounter, 11452 mSDsluCounter, 3777 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11452 SdHoareTripleChecker+Valid, 5334 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 02:20:07,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11452 Valid, 5334 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 703 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 02:20:07,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59691 states. [2021-12-16 02:20:10,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59691 to 37413. [2021-12-16 02:20:10,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37413 states, 37411 states have (on average 1.3206543529977814) internal successors, (49407), 37412 states have internal predecessors, (49407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:20:10,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37413 states to 37413 states and 49407 transitions. [2021-12-16 02:20:10,257 INFO L78 Accepts]: Start accepts. Automaton has 37413 states and 49407 transitions. Word has length 99 [2021-12-16 02:20:10,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:20:10,257 INFO L470 AbstractCegarLoop]: Abstraction has 37413 states and 49407 transitions. [2021-12-16 02:20:10,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 9.956521739130435) internal successors, (229), 22 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 02:20:10,258 INFO L276 IsEmpty]: Start isEmpty. Operand 37413 states and 49407 transitions. [2021-12-16 02:20:10,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-16 02:20:10,259 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:20:10,259 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-16 02:20:10,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 02:20:10,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-16 02:20:10,472 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:20:10,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:20:10,473 INFO L85 PathProgramCache]: Analyzing trace with hash 110338453, now seen corresponding path program 1 times [2021-12-16 02:20:10,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:20:10,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821989517] [2021-12-16 02:20:10,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:20:10,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:20:10,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:20:10,675 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:20:10,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:20:10,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821989517] [2021-12-16 02:20:10,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821989517] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:20:10,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962191208] [2021-12-16 02:20:10,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:20:10,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:20:10,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:20:10,677 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:20:10,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 02:20:10,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:20:10,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-16 02:20:10,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:20:11,462 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:20:11,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:20:12,215 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:20:12,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962191208] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:20:12,215 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 02:20:12,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 29 [2021-12-16 02:20:12,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147503612] [2021-12-16 02:20:12,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 02:20:12,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-16 02:20:12,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:20:12,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-16 02:20:12,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2021-12-16 02:20:12,217 INFO L87 Difference]: Start difference. First operand 37413 states and 49407 transitions. Second operand has 30 states, 30 states have (on average 8.966666666666667) internal successors, (269), 29 states have internal predecessors, (269), 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)