./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label45.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem13_label45.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 2e210509e505e706510a09c6375318a552974bcae2c812476edd01f44c4d9064 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 12:35:43,053 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 12:35:43,055 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 12:35:43,084 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 12:35:43,084 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 12:35:43,085 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 12:35:43,086 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 12:35:43,087 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 12:35:43,088 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 12:35:43,089 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 12:35:43,089 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 12:35:43,090 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 12:35:43,091 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 12:35:43,091 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 12:35:43,092 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 12:35:43,093 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 12:35:43,093 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 12:35:43,094 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 12:35:43,095 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 12:35:43,097 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 12:35:43,098 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 12:35:43,098 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 12:35:43,099 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 12:35:43,100 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 12:35:43,101 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 12:35:43,103 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 12:35:43,103 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 12:35:43,103 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 12:35:43,104 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 12:35:43,104 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 12:35:43,105 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 12:35:43,105 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 12:35:43,106 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 12:35:43,106 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 12:35:43,107 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 12:35:43,108 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 12:35:43,108 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 12:35:43,108 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 12:35:43,108 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 12:35:43,109 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 12:35:43,109 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 12:35:43,110 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 12:35:43,124 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 12:35:43,137 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 12:35:43,137 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 12:35:43,138 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 12:35:43,138 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 12:35:43,138 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 12:35:43,139 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 12:35:43,139 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 12:35:43,139 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 12:35:43,139 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 12:35:43,139 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 12:35:43,140 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 12:35:43,140 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 12:35:43,140 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 12:35:43,140 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 12:35:43,140 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 12:35:43,140 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 12:35:43,141 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 12:35:43,141 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 12:35:43,141 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 12:35:43,141 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 12:35:43,141 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 12:35:43,141 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 12:35:43,142 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 12:35:43,142 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 12:35:43,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 12:35:43,142 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 12:35:43,142 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 12:35:43,142 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 12:35:43,143 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 12:35:43,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 12:35:43,143 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 12:35:43,143 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 12:35:43,143 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 12:35:43,143 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e210509e505e706510a09c6375318a552974bcae2c812476edd01f44c4d9064 [2022-07-22 12:35:43,325 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 12:35:43,340 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 12:35:43,342 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 12:35:43,343 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 12:35:43,343 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 12:35:43,344 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label45.c [2022-07-22 12:35:43,397 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5007d30c1/c28fe79946bd43dea9d691cbf6a3d096/FLAG5923e6b2b [2022-07-22 12:35:43,874 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 12:35:43,874 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label45.c [2022-07-22 12:35:43,898 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5007d30c1/c28fe79946bd43dea9d691cbf6a3d096/FLAG5923e6b2b [2022-07-22 12:35:44,133 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5007d30c1/c28fe79946bd43dea9d691cbf6a3d096 [2022-07-22 12:35:44,135 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 12:35:44,138 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 12:35:44,140 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 12:35:44,140 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 12:35:44,142 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 12:35:44,143 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 12:35:44" (1/1) ... [2022-07-22 12:35:44,144 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ccddf4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:35:44, skipping insertion in model container [2022-07-22 12:35:44,144 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 12:35:44" (1/1) ... [2022-07-22 12:35:44,148 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 12:35:44,235 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 12:35:44,384 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label45.c[1393,1406] [2022-07-22 12:35:45,016 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 12:35:45,023 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 12:35:45,036 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label45.c[1393,1406] [2022-07-22 12:35:45,413 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 12:35:45,428 INFO L208 MainTranslator]: Completed translation [2022-07-22 12:35:45,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:35:45 WrapperNode [2022-07-22 12:35:45,429 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 12:35:45,430 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 12:35:45,430 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 12:35:45,430 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 12:35:45,434 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:35:45" (1/1) ... [2022-07-22 12:35:45,486 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:35:45" (1/1) ... [2022-07-22 12:35:45,897 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2022-07-22 12:35:45,898 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 12:35:45,898 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 12:35:45,899 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 12:35:45,899 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 12:35:45,905 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:35:45" (1/1) ... [2022-07-22 12:35:45,905 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:35:45" (1/1) ... [2022-07-22 12:35:46,100 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:35:45" (1/1) ... [2022-07-22 12:35:46,100 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:35:45" (1/1) ... [2022-07-22 12:35:46,348 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:35:45" (1/1) ... [2022-07-22 12:35:46,371 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:35:45" (1/1) ... [2022-07-22 12:35:46,431 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:35:45" (1/1) ... [2022-07-22 12:35:46,514 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 12:35:46,516 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 12:35:46,516 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 12:35:46,516 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 12:35:46,517 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:35:45" (1/1) ... [2022-07-22 12:35:46,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 12:35:46,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:35:46,541 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 12:35:46,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 12:35:46,571 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 12:35:46,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 12:35:46,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 12:35:46,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 12:35:46,706 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 12:35:46,707 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 12:35:50,016 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 12:35:50,035 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 12:35:50,036 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-22 12:35:50,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 12:35:50 BoogieIcfgContainer [2022-07-22 12:35:50,039 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 12:35:50,040 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 12:35:50,040 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 12:35:50,043 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 12:35:50,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 12:35:44" (1/3) ... [2022-07-22 12:35:50,043 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bc455f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 12:35:50, skipping insertion in model container [2022-07-22 12:35:50,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:35:45" (2/3) ... [2022-07-22 12:35:50,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bc455f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 12:35:50, skipping insertion in model container [2022-07-22 12:35:50,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 12:35:50" (3/3) ... [2022-07-22 12:35:50,045 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label45.c [2022-07-22 12:35:50,054 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 12:35:50,055 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 12:35:50,102 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 12:35:50,107 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1eadbd98, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4e9fd018 [2022-07-22 12:35:50,107 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 12:35:50,113 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:35:50,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-22 12:35:50,118 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:35:50,118 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:35:50,119 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:35:50,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:35:50,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1810726993, now seen corresponding path program 1 times [2022-07-22 12:35:50,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:35:50,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239758407] [2022-07-22 12:35:50,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:35:50,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:35:50,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:35:50,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:35:50,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:35:50,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239758407] [2022-07-22 12:35:50,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239758407] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:35:50,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:35:50,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:35:50,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453664005] [2022-07-22 12:35:50,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:35:50,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:35:50,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:35:50,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:35:50,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:35:50,250 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:35:53,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:35:53,585 INFO L93 Difference]: Finished difference Result 3121 states and 5804 transitions. [2022-07-22 12:35:53,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:35:53,588 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2022-07-22 12:35:53,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:35:53,604 INFO L225 Difference]: With dead ends: 3121 [2022-07-22 12:35:53,604 INFO L226 Difference]: Without dead ends: 1944 [2022-07-22 12:35:53,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:35:53,630 INFO L413 NwaCegarLoop]: 438 mSDtfsCounter, 982 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 3124 mSolverCounterSat, 577 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 982 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 3701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 577 IncrementalHoareTripleChecker+Valid, 3124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-07-22 12:35:53,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [982 Valid, 575 Invalid, 3701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [577 Valid, 3124 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-07-22 12:35:53,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2022-07-22 12:35:53,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1873. [2022-07-22 12:35:53,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1872 states have (on average 1.7393162393162394) internal successors, (3256), 1872 states have internal predecessors, (3256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:35:53,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 3256 transitions. [2022-07-22 12:35:53,718 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 3256 transitions. Word has length 7 [2022-07-22 12:35:53,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:35:53,719 INFO L495 AbstractCegarLoop]: Abstraction has 1873 states and 3256 transitions. [2022-07-22 12:35:53,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:35:53,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 3256 transitions. [2022-07-22 12:35:53,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-22 12:35:53,721 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:35:53,722 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-22 12:35:53,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 12:35:53,722 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:35:53,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:35:53,723 INFO L85 PathProgramCache]: Analyzing trace with hash -887325142, now seen corresponding path program 1 times [2022-07-22 12:35:53,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:35:53,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694305360] [2022-07-22 12:35:53,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:35:53,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:35:53,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:35:53,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:35:53,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:35:53,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694305360] [2022-07-22 12:35:53,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694305360] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:35:53,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:35:53,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:35:53,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889984637] [2022-07-22 12:35:53,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:35:53,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:35:53,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:35:53,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:35:53,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:35:53,910 INFO L87 Difference]: Start difference. First operand 1873 states and 3256 transitions. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:35:56,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:35:56,979 INFO L93 Difference]: Finished difference Result 5351 states and 9369 transitions. [2022-07-22 12:35:56,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:35:56,979 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 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 72 [2022-07-22 12:35:56,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:35:56,991 INFO L225 Difference]: With dead ends: 5351 [2022-07-22 12:35:56,991 INFO L226 Difference]: Without dead ends: 3480 [2022-07-22 12:35:56,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:35:56,997 INFO L413 NwaCegarLoop]: 926 mSDtfsCounter, 884 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 2338 mSolverCounterSat, 878 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 884 SdHoareTripleChecker+Valid, 1079 SdHoareTripleChecker+Invalid, 3216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 878 IncrementalHoareTripleChecker+Valid, 2338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-22 12:35:56,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [884 Valid, 1079 Invalid, 3216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [878 Valid, 2338 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-07-22 12:35:57,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3480 states. [2022-07-22 12:35:57,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3480 to 3479. [2022-07-22 12:35:57,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3479 states, 3478 states have (on average 1.518688901667625) internal successors, (5282), 3478 states have internal predecessors, (5282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:35:57,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3479 states to 3479 states and 5282 transitions. [2022-07-22 12:35:57,054 INFO L78 Accepts]: Start accepts. Automaton has 3479 states and 5282 transitions. Word has length 72 [2022-07-22 12:35:57,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:35:57,055 INFO L495 AbstractCegarLoop]: Abstraction has 3479 states and 5282 transitions. [2022-07-22 12:35:57,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 2 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:35:57,055 INFO L276 IsEmpty]: Start isEmpty. Operand 3479 states and 5282 transitions. [2022-07-22 12:35:57,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-22 12:35:57,056 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:35:57,057 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-22 12:35:57,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 12:35:57,057 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:35:57,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:35:57,058 INFO L85 PathProgramCache]: Analyzing trace with hash -631194865, now seen corresponding path program 1 times [2022-07-22 12:35:57,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:35:57,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057465734] [2022-07-22 12:35:57,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:35:57,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:35:57,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:35:57,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:35:57,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:35:57,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057465734] [2022-07-22 12:35:57,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057465734] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:35:57,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:35:57,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:35:57,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488140524] [2022-07-22 12:35:57,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:35:57,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:35:57,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:35:57,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:35:57,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:35:57,126 INFO L87 Difference]: Start difference. First operand 3479 states and 5282 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:00,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:36:00,031 INFO L93 Difference]: Finished difference Result 10144 states and 15439 transitions. [2022-07-22 12:36:00,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:36:00,031 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 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 74 [2022-07-22 12:36:00,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:36:00,049 INFO L225 Difference]: With dead ends: 10144 [2022-07-22 12:36:00,050 INFO L226 Difference]: Without dead ends: 6667 [2022-07-22 12:36:00,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:36:00,056 INFO L413 NwaCegarLoop]: 745 mSDtfsCounter, 977 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 2554 mSolverCounterSat, 771 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 977 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 3325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 771 IncrementalHoareTripleChecker+Valid, 2554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-22 12:36:00,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [977 Valid, 879 Invalid, 3325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [771 Valid, 2554 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-07-22 12:36:00,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6667 states. [2022-07-22 12:36:00,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6667 to 6657. [2022-07-22 12:36:00,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6657 states, 6656 states have (on average 1.3728966346153846) internal successors, (9138), 6656 states have internal predecessors, (9138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:00,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6657 states to 6657 states and 9138 transitions. [2022-07-22 12:36:00,144 INFO L78 Accepts]: Start accepts. Automaton has 6657 states and 9138 transitions. Word has length 74 [2022-07-22 12:36:00,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:36:00,144 INFO L495 AbstractCegarLoop]: Abstraction has 6657 states and 9138 transitions. [2022-07-22 12:36:00,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:00,145 INFO L276 IsEmpty]: Start isEmpty. Operand 6657 states and 9138 transitions. [2022-07-22 12:36:00,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-22 12:36:00,146 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:36:00,146 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-22 12:36:00,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 12:36:00,146 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:36:00,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:36:00,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1387066238, now seen corresponding path program 1 times [2022-07-22 12:36:00,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:36:00,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724540421] [2022-07-22 12:36:00,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:36:00,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:36:00,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:36:00,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:36:00,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:36:00,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724540421] [2022-07-22 12:36:00,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724540421] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:36:00,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:36:00,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:36:00,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60232917] [2022-07-22 12:36:00,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:36:00,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:36:00,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:36:00,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:36:00,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:36:00,237 INFO L87 Difference]: Start difference. First operand 6657 states and 9138 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:03,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:36:03,201 INFO L93 Difference]: Finished difference Result 19637 states and 26969 transitions. [2022-07-22 12:36:03,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:36:03,202 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 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 80 [2022-07-22 12:36:03,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:36:03,236 INFO L225 Difference]: With dead ends: 19637 [2022-07-22 12:36:03,237 INFO L226 Difference]: Without dead ends: 12982 [2022-07-22 12:36:03,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:36:03,247 INFO L413 NwaCegarLoop]: 1012 mSDtfsCounter, 791 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 2485 mSolverCounterSat, 792 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 1163 SdHoareTripleChecker+Invalid, 3277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 792 IncrementalHoareTripleChecker+Valid, 2485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-22 12:36:03,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [791 Valid, 1163 Invalid, 3277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [792 Valid, 2485 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-07-22 12:36:03,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12982 states. [2022-07-22 12:36:03,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12982 to 12175. [2022-07-22 12:36:03,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12175 states, 12174 states have (on average 1.2529160505996386) internal successors, (15253), 12174 states have internal predecessors, (15253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:03,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12175 states to 12175 states and 15253 transitions. [2022-07-22 12:36:03,535 INFO L78 Accepts]: Start accepts. Automaton has 12175 states and 15253 transitions. Word has length 80 [2022-07-22 12:36:03,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:36:03,536 INFO L495 AbstractCegarLoop]: Abstraction has 12175 states and 15253 transitions. [2022-07-22 12:36:03,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:03,536 INFO L276 IsEmpty]: Start isEmpty. Operand 12175 states and 15253 transitions. [2022-07-22 12:36:03,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-22 12:36:03,538 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:36:03,539 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:36:03,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 12:36:03,539 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:36:03,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:36:03,540 INFO L85 PathProgramCache]: Analyzing trace with hash -920876442, now seen corresponding path program 1 times [2022-07-22 12:36:03,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:36:03,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929752573] [2022-07-22 12:36:03,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:36:03,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:36:03,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:36:03,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:36:03,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:36:03,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929752573] [2022-07-22 12:36:03,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929752573] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:36:03,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959915263] [2022-07-22 12:36:03,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:36:03,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:36:03,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:36:03,735 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 12:36:03,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 12:36:03,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:36:03,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 12:36:03,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:36:03,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 12:36:03,910 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 12:36:03,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959915263] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:36:03,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 12:36:03,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-07-22 12:36:03,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593395290] [2022-07-22 12:36:03,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:36:03,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:36:03,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:36:03,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:36:03,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 12:36:03,912 INFO L87 Difference]: Start difference. First operand 12175 states and 15253 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:06,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:36:06,672 INFO L93 Difference]: Finished difference Result 36312 states and 45491 transitions. [2022-07-22 12:36:06,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:36:06,673 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2022-07-22 12:36:06,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:36:06,759 INFO L225 Difference]: With dead ends: 36312 [2022-07-22 12:36:06,760 INFO L226 Difference]: Without dead ends: 24139 [2022-07-22 12:36:06,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 12:36:06,790 INFO L413 NwaCegarLoop]: 708 mSDtfsCounter, 1053 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 2631 mSolverCounterSat, 544 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1053 SdHoareTripleChecker+Valid, 922 SdHoareTripleChecker+Invalid, 3175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 544 IncrementalHoareTripleChecker+Valid, 2631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-22 12:36:06,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1053 Valid, 922 Invalid, 3175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [544 Valid, 2631 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-22 12:36:06,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24139 states. [2022-07-22 12:36:07,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24139 to 24121. [2022-07-22 12:36:07,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24121 states, 24120 states have (on average 1.2004145936981758) internal successors, (28954), 24120 states have internal predecessors, (28954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:07,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24121 states to 24121 states and 28954 transitions. [2022-07-22 12:36:07,255 INFO L78 Accepts]: Start accepts. Automaton has 24121 states and 28954 transitions. Word has length 96 [2022-07-22 12:36:07,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:36:07,262 INFO L495 AbstractCegarLoop]: Abstraction has 24121 states and 28954 transitions. [2022-07-22 12:36:07,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 2 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:07,262 INFO L276 IsEmpty]: Start isEmpty. Operand 24121 states and 28954 transitions. [2022-07-22 12:36:07,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-07-22 12:36:07,269 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:36:07,269 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:36:07,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-22 12:36:07,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:36:07,488 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:36:07,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:36:07,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1730478932, now seen corresponding path program 1 times [2022-07-22 12:36:07,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:36:07,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860340545] [2022-07-22 12:36:07,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:36:07,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:36:07,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:36:07,608 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 12:36:07,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:36:07,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860340545] [2022-07-22 12:36:07,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860340545] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:36:07,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:36:07,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:36:07,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137034116] [2022-07-22 12:36:07,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:36:07,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:36:07,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:36:07,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:36:07,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:36:07,612 INFO L87 Difference]: Start difference. First operand 24121 states and 28954 transitions. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:10,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:36:10,154 INFO L93 Difference]: Finished difference Result 49027 states and 58708 transitions. [2022-07-22 12:36:10,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:36:10,154 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 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 199 [2022-07-22 12:36:10,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:36:10,219 INFO L225 Difference]: With dead ends: 49027 [2022-07-22 12:36:10,220 INFO L226 Difference]: Without dead ends: 24908 [2022-07-22 12:36:10,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:36:10,238 INFO L413 NwaCegarLoop]: 1083 mSDtfsCounter, 700 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2520 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 2529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-22 12:36:10,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [700 Valid, 1212 Invalid, 2529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2520 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-22 12:36:10,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24908 states. [2022-07-22 12:36:10,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24908 to 24908. [2022-07-22 12:36:10,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24908 states, 24907 states have (on average 1.1942827317621552) internal successors, (29746), 24907 states have internal predecessors, (29746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:10,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24908 states to 24908 states and 29746 transitions. [2022-07-22 12:36:10,468 INFO L78 Accepts]: Start accepts. Automaton has 24908 states and 29746 transitions. Word has length 199 [2022-07-22 12:36:10,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:36:10,468 INFO L495 AbstractCegarLoop]: Abstraction has 24908 states and 29746 transitions. [2022-07-22 12:36:10,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:10,469 INFO L276 IsEmpty]: Start isEmpty. Operand 24908 states and 29746 transitions. [2022-07-22 12:36:10,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-07-22 12:36:10,470 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:36:10,470 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:36:10,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 12:36:10,471 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:36:10,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:36:10,471 INFO L85 PathProgramCache]: Analyzing trace with hash -326571061, now seen corresponding path program 1 times [2022-07-22 12:36:10,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:36:10,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457147689] [2022-07-22 12:36:10,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:36:10,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:36:10,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:36:10,563 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:36:10,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:36:10,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457147689] [2022-07-22 12:36:10,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457147689] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:36:10,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:36:10,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:36:10,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831207083] [2022-07-22 12:36:10,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:36:10,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:36:10,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:36:10,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:36:10,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:36:10,567 INFO L87 Difference]: Start difference. First operand 24908 states and 29746 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:13,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:36:13,465 INFO L93 Difference]: Finished difference Result 61634 states and 75007 transitions. [2022-07-22 12:36:13,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:36:13,466 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 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 206 [2022-07-22 12:36:13,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:36:13,528 INFO L225 Difference]: With dead ends: 61634 [2022-07-22 12:36:13,528 INFO L226 Difference]: Without dead ends: 37515 [2022-07-22 12:36:13,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:36:13,547 INFO L413 NwaCegarLoop]: 826 mSDtfsCounter, 861 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 2390 mSolverCounterSat, 915 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 861 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 3305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 915 IncrementalHoareTripleChecker+Valid, 2390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-22 12:36:13,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [861 Valid, 945 Invalid, 3305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [915 Valid, 2390 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-22 12:36:13,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37515 states. [2022-07-22 12:36:13,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37515 to 35930. [2022-07-22 12:36:13,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35930 states, 35929 states have (on average 1.1823874864315733) internal successors, (42482), 35929 states have internal predecessors, (42482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:13,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35930 states to 35930 states and 42482 transitions. [2022-07-22 12:36:13,954 INFO L78 Accepts]: Start accepts. Automaton has 35930 states and 42482 transitions. Word has length 206 [2022-07-22 12:36:13,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:36:13,955 INFO L495 AbstractCegarLoop]: Abstraction has 35930 states and 42482 transitions. [2022-07-22 12:36:13,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:13,955 INFO L276 IsEmpty]: Start isEmpty. Operand 35930 states and 42482 transitions. [2022-07-22 12:36:13,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-07-22 12:36:13,958 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:36:13,958 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:36:13,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 12:36:13,959 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:36:13,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:36:13,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1890222288, now seen corresponding path program 1 times [2022-07-22 12:36:13,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:36:13,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503364172] [2022-07-22 12:36:13,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:36:13,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:36:14,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:36:14,051 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:36:14,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:36:14,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503364172] [2022-07-22 12:36:14,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503364172] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:36:14,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:36:14,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:36:14,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005513811] [2022-07-22 12:36:14,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:36:14,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:36:14,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:36:14,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:36:14,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:36:14,054 INFO L87 Difference]: Start difference. First operand 35930 states and 42482 transitions. Second operand has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:16,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:36:16,670 INFO L93 Difference]: Finished difference Result 70920 states and 83963 transitions. [2022-07-22 12:36:16,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:36:16,671 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 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 221 [2022-07-22 12:36:16,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:36:16,718 INFO L225 Difference]: With dead ends: 70920 [2022-07-22 12:36:16,718 INFO L226 Difference]: Without dead ends: 35779 [2022-07-22 12:36:16,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:36:16,742 INFO L413 NwaCegarLoop]: 1504 mSDtfsCounter, 1036 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2350 mSolverCounterSat, 602 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1036 SdHoareTripleChecker+Valid, 1641 SdHoareTripleChecker+Invalid, 2952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 602 IncrementalHoareTripleChecker+Valid, 2350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-22 12:36:16,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1036 Valid, 1641 Invalid, 2952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [602 Valid, 2350 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-22 12:36:16,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35779 states. [2022-07-22 12:36:16,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35779 to 34200. [2022-07-22 12:36:17,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34200 states, 34199 states have (on average 1.1296821544489606) internal successors, (38634), 34199 states have internal predecessors, (38634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:17,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34200 states to 34200 states and 38634 transitions. [2022-07-22 12:36:17,055 INFO L78 Accepts]: Start accepts. Automaton has 34200 states and 38634 transitions. Word has length 221 [2022-07-22 12:36:17,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:36:17,056 INFO L495 AbstractCegarLoop]: Abstraction has 34200 states and 38634 transitions. [2022-07-22 12:36:17,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:17,056 INFO L276 IsEmpty]: Start isEmpty. Operand 34200 states and 38634 transitions. [2022-07-22 12:36:17,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2022-07-22 12:36:17,059 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:36:17,059 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:36:17,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 12:36:17,060 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:36:17,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:36:17,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1768382239, now seen corresponding path program 1 times [2022-07-22 12:36:17,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:36:17,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859818474] [2022-07-22 12:36:17,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:36:17,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:36:17,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:36:17,255 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 271 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 12:36:17,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:36:17,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859818474] [2022-07-22 12:36:17,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859818474] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:36:17,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:36:17,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:36:17,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692835754] [2022-07-22 12:36:17,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:36:17,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:36:17,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:36:17,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:36:17,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:36:17,258 INFO L87 Difference]: Start difference. First operand 34200 states and 38634 transitions. Second operand has 4 states, 4 states have (on average 71.5) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:22,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:36:22,048 INFO L93 Difference]: Finished difference Result 100862 states and 114153 transitions. [2022-07-22 12:36:22,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:36:22,057 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 71.5) internal successors, (286), 3 states have internal predecessors, (286), 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 290 [2022-07-22 12:36:22,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:36:22,137 INFO L225 Difference]: With dead ends: 100862 [2022-07-22 12:36:22,137 INFO L226 Difference]: Without dead ends: 67451 [2022-07-22 12:36:22,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:36:22,170 INFO L413 NwaCegarLoop]: 566 mSDtfsCounter, 1718 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 5996 mSolverCounterSat, 1104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1718 SdHoareTripleChecker+Valid, 756 SdHoareTripleChecker+Invalid, 7100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1104 IncrementalHoareTripleChecker+Valid, 5996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-22 12:36:22,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1718 Valid, 756 Invalid, 7100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1104 Valid, 5996 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-07-22 12:36:22,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67451 states. [2022-07-22 12:36:22,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67451 to 65761. [2022-07-22 12:36:22,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65761 states, 65760 states have (on average 1.1186587591240875) internal successors, (73563), 65760 states have internal predecessors, (73563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:23,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65761 states to 65761 states and 73563 transitions. [2022-07-22 12:36:23,038 INFO L78 Accepts]: Start accepts. Automaton has 65761 states and 73563 transitions. Word has length 290 [2022-07-22 12:36:23,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:36:23,040 INFO L495 AbstractCegarLoop]: Abstraction has 65761 states and 73563 transitions. [2022-07-22 12:36:23,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.5) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:23,040 INFO L276 IsEmpty]: Start isEmpty. Operand 65761 states and 73563 transitions. [2022-07-22 12:36:23,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2022-07-22 12:36:23,180 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:36:23,180 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:36:23,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 12:36:23,181 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:36:23,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:36:23,181 INFO L85 PathProgramCache]: Analyzing trace with hash -293262909, now seen corresponding path program 1 times [2022-07-22 12:36:23,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:36:23,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501297512] [2022-07-22 12:36:23,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:36:23,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:36:23,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:36:23,289 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 178 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-22 12:36:23,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:36:23,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501297512] [2022-07-22 12:36:23,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501297512] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:36:23,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:36:23,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:36:23,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742751646] [2022-07-22 12:36:23,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:36:23,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:36:23,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:36:23,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:36:23,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:36:23,292 INFO L87 Difference]: Start difference. First operand 65761 states and 73563 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:26,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:36:26,372 INFO L93 Difference]: Finished difference Result 144134 states and 160907 transitions. [2022-07-22 12:36:26,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:36:26,373 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 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 304 [2022-07-22 12:36:26,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:36:26,463 INFO L225 Difference]: With dead ends: 144134 [2022-07-22 12:36:26,463 INFO L226 Difference]: Without dead ends: 79162 [2022-07-22 12:36:26,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:36:26,498 INFO L413 NwaCegarLoop]: 1001 mSDtfsCounter, 728 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 2689 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 1177 SdHoareTripleChecker+Invalid, 2869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 2689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-22 12:36:26,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [728 Valid, 1177 Invalid, 2869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 2689 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-22 12:36:26,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79162 states. [2022-07-22 12:36:27,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79162 to 78365. [2022-07-22 12:36:27,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78365 states, 78364 states have (on average 1.106732683375019) internal successors, (86728), 78364 states have internal predecessors, (86728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:27,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78365 states to 78365 states and 86728 transitions. [2022-07-22 12:36:27,566 INFO L78 Accepts]: Start accepts. Automaton has 78365 states and 86728 transitions. Word has length 304 [2022-07-22 12:36:27,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:36:27,567 INFO L495 AbstractCegarLoop]: Abstraction has 78365 states and 86728 transitions. [2022-07-22 12:36:27,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:27,567 INFO L276 IsEmpty]: Start isEmpty. Operand 78365 states and 86728 transitions. [2022-07-22 12:36:27,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2022-07-22 12:36:27,584 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:36:27,585 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:36:27,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 12:36:27,585 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:36:27,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:36:27,591 INFO L85 PathProgramCache]: Analyzing trace with hash 2041023051, now seen corresponding path program 1 times [2022-07-22 12:36:27,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:36:27,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219921482] [2022-07-22 12:36:27,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:36:27,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:36:27,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:36:28,124 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 178 proven. 113 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 12:36:28,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:36:28,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219921482] [2022-07-22 12:36:28,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219921482] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:36:28,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434848739] [2022-07-22 12:36:28,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:36:28,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:36:28,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:36:28,127 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 12:36:28,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 12:36:28,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:36:28,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 12:36:28,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:36:28,386 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 178 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-07-22 12:36:28,386 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 12:36:28,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434848739] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:36:28,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 12:36:28,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-07-22 12:36:28,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756580182] [2022-07-22 12:36:28,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:36:28,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:36:28,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:36:28,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:36:28,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-22 12:36:28,389 INFO L87 Difference]: Start difference. First operand 78365 states and 86728 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:31,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:36:31,376 INFO L93 Difference]: Finished difference Result 155939 states and 172661 transitions. [2022-07-22 12:36:31,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:36:31,377 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 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 333 [2022-07-22 12:36:31,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:36:31,474 INFO L225 Difference]: With dead ends: 155939 [2022-07-22 12:36:31,474 INFO L226 Difference]: Without dead ends: 78363 [2022-07-22 12:36:31,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-22 12:36:31,518 INFO L413 NwaCegarLoop]: 1343 mSDtfsCounter, 1113 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 2462 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1113 SdHoareTripleChecker+Valid, 1422 SdHoareTripleChecker+Invalid, 2906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 2462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-22 12:36:31,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1113 Valid, 1422 Invalid, 2906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 2462 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-22 12:36:31,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78363 states. [2022-07-22 12:36:32,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78363 to 78362. [2022-07-22 12:36:32,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78362 states, 78361 states have (on average 1.0850167813070277) internal successors, (85023), 78361 states have internal predecessors, (85023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:32,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78362 states to 78362 states and 85023 transitions. [2022-07-22 12:36:32,404 INFO L78 Accepts]: Start accepts. Automaton has 78362 states and 85023 transitions. Word has length 333 [2022-07-22 12:36:32,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:36:32,405 INFO L495 AbstractCegarLoop]: Abstraction has 78362 states and 85023 transitions. [2022-07-22 12:36:32,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:32,405 INFO L276 IsEmpty]: Start isEmpty. Operand 78362 states and 85023 transitions. [2022-07-22 12:36:32,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2022-07-22 12:36:32,408 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:36:32,408 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:36:32,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 12:36:32,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-22 12:36:32,626 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:36:32,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:36:32,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1359381949, now seen corresponding path program 1 times [2022-07-22 12:36:32,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:36:32,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015957937] [2022-07-22 12:36:32,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:36:32,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:36:32,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:36:32,822 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 226 proven. 5 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2022-07-22 12:36:32,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:36:32,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015957937] [2022-07-22 12:36:32,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015957937] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:36:32,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175072813] [2022-07-22 12:36:32,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:36:32,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:36:32,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:36:32,830 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) [2022-07-22 12:36:32,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 12:36:32,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:36:32,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 12:36:32,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:36:33,476 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 383 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-07-22 12:36:33,476 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 12:36:33,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175072813] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:36:33,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 12:36:33,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-07-22 12:36:33,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813100615] [2022-07-22 12:36:33,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:36:33,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:36:33,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:36:33,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:36:33,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 12:36:33,479 INFO L87 Difference]: Start difference. First operand 78362 states and 85023 transitions. Second operand has 4 states, 4 states have (on average 65.5) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:39,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:36:39,656 INFO L93 Difference]: Finished difference Result 188382 states and 204603 transitions. [2022-07-22 12:36:39,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:36:39,657 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 65.5) internal successors, (262), 3 states have internal predecessors, (262), 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 336 [2022-07-22 12:36:39,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:36:39,787 INFO L225 Difference]: With dead ends: 188382 [2022-07-22 12:36:39,788 INFO L226 Difference]: Without dead ends: 110809 [2022-07-22 12:36:39,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 12:36:39,820 INFO L413 NwaCegarLoop]: 452 mSDtfsCounter, 1697 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 5786 mSolverCounterSat, 854 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1697 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 6640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 854 IncrementalHoareTripleChecker+Valid, 5786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-07-22 12:36:39,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1697 Valid, 637 Invalid, 6640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [854 Valid, 5786 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-07-22 12:36:39,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110809 states. [2022-07-22 12:36:41,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110809 to 109125. [2022-07-22 12:36:41,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109125 states, 109124 states have (on average 1.0852791319966277) internal successors, (118430), 109124 states have internal predecessors, (118430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:41,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109125 states to 109125 states and 118430 transitions. [2022-07-22 12:36:41,215 INFO L78 Accepts]: Start accepts. Automaton has 109125 states and 118430 transitions. Word has length 336 [2022-07-22 12:36:41,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:36:41,216 INFO L495 AbstractCegarLoop]: Abstraction has 109125 states and 118430 transitions. [2022-07-22 12:36:41,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.5) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:41,216 INFO L276 IsEmpty]: Start isEmpty. Operand 109125 states and 118430 transitions. [2022-07-22 12:36:41,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2022-07-22 12:36:41,219 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:36:41,219 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:36:41,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 12:36:41,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:36:41,436 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:36:41,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:36:41,437 INFO L85 PathProgramCache]: Analyzing trace with hash 448404453, now seen corresponding path program 1 times [2022-07-22 12:36:41,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:36:41,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589994109] [2022-07-22 12:36:41,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:36:41,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:36:41,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:36:41,782 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 155 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-07-22 12:36:41,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:36:41,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589994109] [2022-07-22 12:36:41,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589994109] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:36:41,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:36:41,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:36:41,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779639424] [2022-07-22 12:36:41,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:36:41,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:36:41,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:36:41,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:36:41,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:36:41,783 INFO L87 Difference]: Start difference. First operand 109125 states and 118430 transitions. Second operand has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:45,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:36:45,448 INFO L93 Difference]: Finished difference Result 252884 states and 276258 transitions. [2022-07-22 12:36:45,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:36:45,455 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 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 369 [2022-07-22 12:36:45,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:36:45,629 INFO L225 Difference]: With dead ends: 252884 [2022-07-22 12:36:45,630 INFO L226 Difference]: Without dead ends: 144548 [2022-07-22 12:36:45,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:36:45,650 INFO L413 NwaCegarLoop]: 1757 mSDtfsCounter, 787 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 2519 mSolverCounterSat, 730 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 1896 SdHoareTripleChecker+Invalid, 3249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 730 IncrementalHoareTripleChecker+Valid, 2519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-22 12:36:45,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [787 Valid, 1896 Invalid, 3249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [730 Valid, 2519 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-22 12:36:45,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144548 states. [2022-07-22 12:36:46,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144548 to 136663. [2022-07-22 12:36:47,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136663 states, 136662 states have (on average 1.0765611508685662) internal successors, (147125), 136662 states have internal predecessors, (147125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:47,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136663 states to 136663 states and 147125 transitions. [2022-07-22 12:36:47,188 INFO L78 Accepts]: Start accepts. Automaton has 136663 states and 147125 transitions. Word has length 369 [2022-07-22 12:36:47,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:36:47,189 INFO L495 AbstractCegarLoop]: Abstraction has 136663 states and 147125 transitions. [2022-07-22 12:36:47,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:47,189 INFO L276 IsEmpty]: Start isEmpty. Operand 136663 states and 147125 transitions. [2022-07-22 12:36:47,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2022-07-22 12:36:47,192 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:36:47,193 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:36:47,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-22 12:36:47,193 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:36:47,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:36:47,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1658991805, now seen corresponding path program 1 times [2022-07-22 12:36:47,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:36:47,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688670795] [2022-07-22 12:36:47,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:36:47,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:36:47,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:36:47,516 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-07-22 12:36:47,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:36:47,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688670795] [2022-07-22 12:36:47,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688670795] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:36:47,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:36:47,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:36:47,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269084206] [2022-07-22 12:36:47,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:36:47,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:36:47,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:36:47,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:36:47,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:36:47,519 INFO L87 Difference]: Start difference. First operand 136663 states and 147125 transitions. Second operand has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:50,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:36:50,953 INFO L93 Difference]: Finished difference Result 276476 states and 297426 transitions. [2022-07-22 12:36:50,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:36:50,954 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 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 411 [2022-07-22 12:36:50,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:36:51,313 INFO L225 Difference]: With dead ends: 276476 [2022-07-22 12:36:51,314 INFO L226 Difference]: Without dead ends: 140602 [2022-07-22 12:36:51,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:36:51,378 INFO L413 NwaCegarLoop]: 1380 mSDtfsCounter, 1031 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 2480 mSolverCounterSat, 609 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1031 SdHoareTripleChecker+Valid, 1466 SdHoareTripleChecker+Invalid, 3089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 609 IncrementalHoareTripleChecker+Valid, 2480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-22 12:36:51,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1031 Valid, 1466 Invalid, 3089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [609 Valid, 2480 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-22 12:36:51,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140602 states. [2022-07-22 12:36:52,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140602 to 136651. [2022-07-22 12:36:52,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136651 states, 136650 states have (on average 1.0645810464690817) internal successors, (145475), 136650 states have internal predecessors, (145475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:53,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136651 states to 136651 states and 145475 transitions. [2022-07-22 12:36:53,129 INFO L78 Accepts]: Start accepts. Automaton has 136651 states and 145475 transitions. Word has length 411 [2022-07-22 12:36:53,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:36:53,129 INFO L495 AbstractCegarLoop]: Abstraction has 136651 states and 145475 transitions. [2022-07-22 12:36:53,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:53,130 INFO L276 IsEmpty]: Start isEmpty. Operand 136651 states and 145475 transitions. [2022-07-22 12:36:53,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2022-07-22 12:36:53,136 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:36:53,136 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:36:53,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-22 12:36:53,136 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:36:53,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:36:53,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1835753279, now seen corresponding path program 1 times [2022-07-22 12:36:53,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:36:53,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259902525] [2022-07-22 12:36:53,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:36:53,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:36:53,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:36:53,357 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 450 proven. 113 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2022-07-22 12:36:53,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:36:53,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259902525] [2022-07-22 12:36:53,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259902525] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:36:53,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442580416] [2022-07-22 12:36:53,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:36:53,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:36:53,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:36:53,372 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 12:36:53,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 12:36:53,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:36:53,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 12:36:53,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:36:53,603 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 494 proven. 0 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-07-22 12:36:53,604 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 12:36:53,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442580416] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:36:53,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 12:36:53,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-07-22 12:36:53,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025947470] [2022-07-22 12:36:53,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:36:53,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:36:53,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:36:53,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:36:53,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-22 12:36:53,606 INFO L87 Difference]: Start difference. First operand 136651 states and 145475 transitions. Second operand has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:56,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:36:56,984 INFO L93 Difference]: Finished difference Result 274873 states and 292534 transitions. [2022-07-22 12:36:56,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:36:56,984 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 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 470 [2022-07-22 12:36:56,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:36:57,158 INFO L225 Difference]: With dead ends: 274873 [2022-07-22 12:36:57,159 INFO L226 Difference]: Without dead ends: 139011 [2022-07-22 12:36:57,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 469 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-22 12:36:57,231 INFO L413 NwaCegarLoop]: 481 mSDtfsCounter, 1034 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 2365 mSolverCounterSat, 669 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1034 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 3034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 669 IncrementalHoareTripleChecker+Valid, 2365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-22 12:36:57,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1034 Valid, 529 Invalid, 3034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [669 Valid, 2365 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-22 12:36:57,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139011 states. [2022-07-22 12:36:58,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139011 to 136636. [2022-07-22 12:36:58,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136636 states, 136635 states have (on average 1.0588209463168294) internal successors, (144672), 136635 states have internal predecessors, (144672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:58,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136636 states to 136636 states and 144672 transitions. [2022-07-22 12:36:58,917 INFO L78 Accepts]: Start accepts. Automaton has 136636 states and 144672 transitions. Word has length 470 [2022-07-22 12:36:58,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:36:58,917 INFO L495 AbstractCegarLoop]: Abstraction has 136636 states and 144672 transitions. [2022-07-22 12:36:58,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.0) internal successors, (270), 3 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:36:58,917 INFO L276 IsEmpty]: Start isEmpty. Operand 136636 states and 144672 transitions. [2022-07-22 12:36:58,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2022-07-22 12:36:58,924 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:36:58,924 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-22 12:36:58,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 12:36:59,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-22 12:36:59,143 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:36:59,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:36:59,143 INFO L85 PathProgramCache]: Analyzing trace with hash -2110920467, now seen corresponding path program 1 times [2022-07-22 12:36:59,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:36:59,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687311096] [2022-07-22 12:36:59,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:36:59,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:36:59,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:36:59,363 INFO L134 CoverageAnalysis]: Checked inductivity of 837 backedges. 484 proven. 113 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-07-22 12:36:59,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:36:59,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687311096] [2022-07-22 12:36:59,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687311096] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:36:59,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824811567] [2022-07-22 12:36:59,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:36:59,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:36:59,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:36:59,384 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 12:36:59,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 12:36:59,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:36:59,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 12:36:59,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:36:59,894 INFO L134 CoverageAnalysis]: Checked inductivity of 837 backedges. 550 proven. 0 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2022-07-22 12:36:59,894 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 12:36:59,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824811567] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:36:59,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 12:36:59,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-07-22 12:36:59,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720622309] [2022-07-22 12:36:59,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:36:59,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:36:59,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:36:59,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:36:59,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-22 12:36:59,896 INFO L87 Difference]: Start difference. First operand 136636 states and 144672 transitions. Second operand has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:37:03,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:37:03,035 INFO L93 Difference]: Finished difference Result 302403 states and 320777 transitions. [2022-07-22 12:37:03,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:37:03,036 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 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 487 [2022-07-22 12:37:03,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:37:03,234 INFO L225 Difference]: With dead ends: 302403 [2022-07-22 12:37:03,234 INFO L226 Difference]: Without dead ends: 166556 [2022-07-22 12:37:03,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-22 12:37:03,304 INFO L413 NwaCegarLoop]: 1596 mSDtfsCounter, 856 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 2486 mSolverCounterSat, 468 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 856 SdHoareTripleChecker+Valid, 1717 SdHoareTripleChecker+Invalid, 2954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 468 IncrementalHoareTripleChecker+Valid, 2486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-22 12:37:03,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [856 Valid, 1717 Invalid, 2954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [468 Valid, 2486 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-22 12:37:03,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166556 states. [2022-07-22 12:37:05,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166556 to 163392. [2022-07-22 12:37:05,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163392 states, 163391 states have (on average 1.0560618393913985) internal successors, (172551), 163391 states have internal predecessors, (172551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:37:05,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163392 states to 163392 states and 172551 transitions. [2022-07-22 12:37:05,280 INFO L78 Accepts]: Start accepts. Automaton has 163392 states and 172551 transitions. Word has length 487 [2022-07-22 12:37:05,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:37:05,281 INFO L495 AbstractCegarLoop]: Abstraction has 163392 states and 172551 transitions. [2022-07-22 12:37:05,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:37:05,281 INFO L276 IsEmpty]: Start isEmpty. Operand 163392 states and 172551 transitions. [2022-07-22 12:37:05,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2022-07-22 12:37:05,288 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:37:05,288 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:37:05,305 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-22 12:37:05,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-22 12:37:05,505 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:37:05,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:37:05,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1524835936, now seen corresponding path program 1 times [2022-07-22 12:37:05,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:37:05,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193289446] [2022-07-22 12:37:05,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:37:05,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:37:05,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:37:06,134 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 247 proven. 113 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-22 12:37:06,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:37:06,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193289446] [2022-07-22 12:37:06,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193289446] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:37:06,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264693695] [2022-07-22 12:37:06,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:37:06,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:37:06,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:37:06,146 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 12:37:06,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 12:37:06,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:37:06,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 647 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 12:37:06,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:37:06,739 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 247 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-07-22 12:37:06,739 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 12:37:06,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264693695] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:37:06,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 12:37:06,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-07-22 12:37:06,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099348204] [2022-07-22 12:37:06,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:37:06,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:37:06,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:37:06,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:37:06,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-07-22 12:37:06,741 INFO L87 Difference]: Start difference. First operand 163392 states and 172551 transitions. Second operand has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 2 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:37:09,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:37:09,753 INFO L93 Difference]: Finished difference Result 312623 states and 330739 transitions. [2022-07-22 12:37:09,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:37:09,754 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 2 states have internal predecessors, (382), 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 498 [2022-07-22 12:37:09,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:37:09,954 INFO L225 Difference]: With dead ends: 312623 [2022-07-22 12:37:09,954 INFO L226 Difference]: Without dead ends: 166552 [2022-07-22 12:37:10,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 497 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-07-22 12:37:10,052 INFO L413 NwaCegarLoop]: 998 mSDtfsCounter, 682 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 2435 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 1132 SdHoareTripleChecker+Invalid, 2547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 2435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-22 12:37:10,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [682 Valid, 1132 Invalid, 2547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 2435 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-22 12:37:10,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166552 states. [2022-07-22 12:37:11,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166552 to 166542. [2022-07-22 12:37:11,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166542 states, 166541 states have (on average 1.0514708089899785) internal successors, (175113), 166541 states have internal predecessors, (175113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:37:12,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166542 states to 166542 states and 175113 transitions. [2022-07-22 12:37:12,076 INFO L78 Accepts]: Start accepts. Automaton has 166542 states and 175113 transitions. Word has length 498 [2022-07-22 12:37:12,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:37:12,076 INFO L495 AbstractCegarLoop]: Abstraction has 166542 states and 175113 transitions. [2022-07-22 12:37:12,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.33333333333333) internal successors, (382), 2 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:37:12,076 INFO L276 IsEmpty]: Start isEmpty. Operand 166542 states and 175113 transitions. [2022-07-22 12:37:12,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 621 [2022-07-22 12:37:12,082 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:37:12,082 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:37:12,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 12:37:12,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-22 12:37:12,296 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:37:12,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:37:12,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1468928245, now seen corresponding path program 1 times [2022-07-22 12:37:12,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:37:12,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778426534] [2022-07-22 12:37:12,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:37:12,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:37:12,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:37:12,858 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 226 proven. 5 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2022-07-22 12:37:12,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:37:12,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778426534] [2022-07-22 12:37:12,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778426534] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:37:12,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781879123] [2022-07-22 12:37:12,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:37:12,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:37:12,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:37:12,885 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 12:37:12,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 12:37:13,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:37:13,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 801 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 12:37:13,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:37:13,459 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 295 proven. 10 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2022-07-22 12:37:13,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 12:37:13,866 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 295 proven. 10 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2022-07-22 12:37:13,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781879123] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 12:37:13,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 12:37:13,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-07-22 12:37:13,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155345377] [2022-07-22 12:37:13,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 12:37:13,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 12:37:13,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:37:13,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 12:37:13,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-22 12:37:13,868 INFO L87 Difference]: Start difference. First operand 166542 states and 175113 transitions. Second operand has 8 states, 8 states have (on average 77.625) internal successors, (621), 8 states have internal predecessors, (621), 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)