./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem03_label40.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem03_label40.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 50a84ef689ee1e06fdacd72e7701ff2c38527734cebc573231d698f970fe37fd --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 22:48:08,929 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 22:48:08,931 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 22:48:08,986 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 22:48:08,987 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 22:48:08,988 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 22:48:08,992 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 22:48:08,995 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 22:48:08,997 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 22:48:09,001 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 22:48:09,002 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 22:48:09,006 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 22:48:09,007 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 22:48:09,009 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 22:48:09,010 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 22:48:09,013 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 22:48:09,014 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 22:48:09,016 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 22:48:09,018 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 22:48:09,023 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 22:48:09,025 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 22:48:09,026 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 22:48:09,028 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 22:48:09,028 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 22:48:09,030 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 22:48:09,036 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 22:48:09,036 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 22:48:09,037 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 22:48:09,038 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 22:48:09,038 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 22:48:09,039 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 22:48:09,039 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 22:48:09,041 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 22:48:09,042 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 22:48:09,043 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 22:48:09,044 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 22:48:09,044 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 22:48:09,044 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 22:48:09,045 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 22:48:09,045 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 22:48:09,046 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 22:48:09,047 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 22:48:09,052 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 22:48:09,084 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 22:48:09,085 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 22:48:09,085 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 22:48:09,085 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 22:48:09,086 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 22:48:09,086 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 22:48:09,087 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 22:48:09,087 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 22:48:09,087 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 22:48:09,088 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 22:48:09,088 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 22:48:09,089 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 22:48:09,089 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 22:48:09,089 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 22:48:09,089 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 22:48:09,090 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 22:48:09,090 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 22:48:09,090 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 22:48:09,090 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 22:48:09,090 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 22:48:09,091 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 22:48:09,091 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 22:48:09,091 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 22:48:09,091 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 22:48:09,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 22:48:09,092 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 22:48:09,092 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 22:48:09,092 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 22:48:09,092 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 22:48:09,093 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 22:48:09,093 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 22:48:09,093 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 22:48:09,093 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 22:48:09,093 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 50a84ef689ee1e06fdacd72e7701ff2c38527734cebc573231d698f970fe37fd [2022-07-20 22:48:09,448 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 22:48:09,473 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 22:48:09,476 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 22:48:09,477 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 22:48:09,478 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 22:48:09,479 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label40.c [2022-07-20 22:48:09,543 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/125620ca4/c7e705f28d254ad6bfced45631359155/FLAG7e5500841 [2022-07-20 22:48:10,115 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 22:48:10,116 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label40.c [2022-07-20 22:48:10,136 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/125620ca4/c7e705f28d254ad6bfced45631359155/FLAG7e5500841 [2022-07-20 22:48:10,560 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/125620ca4/c7e705f28d254ad6bfced45631359155 [2022-07-20 22:48:10,562 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 22:48:10,563 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 22:48:10,566 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 22:48:10,566 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 22:48:10,569 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 22:48:10,570 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:48:10" (1/1) ... [2022-07-20 22:48:10,571 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46fa1da8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:48:10, skipping insertion in model container [2022-07-20 22:48:10,571 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:48:10" (1/1) ... [2022-07-20 22:48:10,580 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 22:48:10,643 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 22:48:11,097 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/Problem03_label40.c[59070,59083] [2022-07-20 22:48:11,132 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 22:48:11,140 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 22:48:11,307 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/Problem03_label40.c[59070,59083] [2022-07-20 22:48:11,322 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 22:48:11,338 INFO L208 MainTranslator]: Completed translation [2022-07-20 22:48:11,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:48:11 WrapperNode [2022-07-20 22:48:11,339 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 22:48:11,346 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 22:48:11,347 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 22:48:11,347 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 22:48:11,352 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:48:11" (1/1) ... [2022-07-20 22:48:11,398 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:48:11" (1/1) ... [2022-07-20 22:48:11,478 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-07-20 22:48:11,479 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 22:48:11,480 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 22:48:11,480 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 22:48:11,480 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 22:48:11,488 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:48:11" (1/1) ... [2022-07-20 22:48:11,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:48:11" (1/1) ... [2022-07-20 22:48:11,497 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:48:11" (1/1) ... [2022-07-20 22:48:11,498 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:48:11" (1/1) ... [2022-07-20 22:48:11,572 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:48:11" (1/1) ... [2022-07-20 22:48:11,593 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:48:11" (1/1) ... [2022-07-20 22:48:11,604 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:48:11" (1/1) ... [2022-07-20 22:48:11,613 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 22:48:11,615 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 22:48:11,615 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 22:48:11,616 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 22:48:11,616 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:48:11" (1/1) ... [2022-07-20 22:48:11,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 22:48:11,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:48:11,652 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-20 22:48:11,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-20 22:48:11,693 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 22:48:11,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 22:48:11,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 22:48:11,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 22:48:11,789 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 22:48:11,791 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 22:48:13,321 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 22:48:13,330 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 22:48:13,330 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-20 22:48:13,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:48:13 BoogieIcfgContainer [2022-07-20 22:48:13,333 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 22:48:13,335 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 22:48:13,335 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 22:48:13,337 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 22:48:13,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:48:10" (1/3) ... [2022-07-20 22:48:13,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18039062 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:48:13, skipping insertion in model container [2022-07-20 22:48:13,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:48:11" (2/3) ... [2022-07-20 22:48:13,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18039062 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:48:13, skipping insertion in model container [2022-07-20 22:48:13,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:48:13" (3/3) ... [2022-07-20 22:48:13,340 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label40.c [2022-07-20 22:48:13,353 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 22:48:13,353 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 22:48:13,430 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 22:48:13,436 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@4f74e7f1, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5ff644d5 [2022-07-20 22:48:13,436 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 22:48:13,441 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:13,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-07-20 22:48:13,460 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:48:13,461 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:48:13,461 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:48:13,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:48:13,467 INFO L85 PathProgramCache]: Analyzing trace with hash 359811874, now seen corresponding path program 1 times [2022-07-20 22:48:13,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:48:13,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696653966] [2022-07-20 22:48:13,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:48:13,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:48:13,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:48:14,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:48:14,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:48:14,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696653966] [2022-07-20 22:48:14,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696653966] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:48:14,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:48:14,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 22:48:14,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903262343] [2022-07-20 22:48:14,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:48:14,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:48:14,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:48:14,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:48:14,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:48:14,065 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:14,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:48:14,988 INFO L93 Difference]: Finished difference Result 855 states and 1496 transitions. [2022-07-20 22:48:14,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:48:14,990 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 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 184 [2022-07-20 22:48:14,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:48:15,008 INFO L225 Difference]: With dead ends: 855 [2022-07-20 22:48:15,009 INFO L226 Difference]: Without dead ends: 460 [2022-07-20 22:48:15,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:48:15,021 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 112 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-20 22:48:15,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 176 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-20 22:48:15,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-07-20 22:48:15,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 459. [2022-07-20 22:48:15,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 1.5502183406113537) internal successors, (710), 458 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:15,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 710 transitions. [2022-07-20 22:48:15,083 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 710 transitions. Word has length 184 [2022-07-20 22:48:15,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:48:15,084 INFO L495 AbstractCegarLoop]: Abstraction has 459 states and 710 transitions. [2022-07-20 22:48:15,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 2 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:15,085 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 710 transitions. [2022-07-20 22:48:15,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-07-20 22:48:15,092 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:48:15,093 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:48:15,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 22:48:15,094 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:48:15,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:48:15,095 INFO L85 PathProgramCache]: Analyzing trace with hash -116317198, now seen corresponding path program 1 times [2022-07-20 22:48:15,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:48:15,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566933345] [2022-07-20 22:48:15,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:48:15,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:48:15,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:48:15,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:48:15,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:48:15,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566933345] [2022-07-20 22:48:15,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566933345] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:48:15,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:48:15,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 22:48:15,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798825343] [2022-07-20 22:48:15,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:48:15,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:48:15,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:48:15,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:48:15,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:48:15,194 INFO L87 Difference]: Start difference. First operand 459 states and 710 transitions. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:15,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:48:15,903 INFO L93 Difference]: Finished difference Result 1342 states and 2082 transitions. [2022-07-20 22:48:15,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:48:15,904 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 189 [2022-07-20 22:48:15,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:48:15,908 INFO L225 Difference]: With dead ends: 1342 [2022-07-20 22:48:15,908 INFO L226 Difference]: Without dead ends: 885 [2022-07-20 22:48:15,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:48:15,910 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 251 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 22:48:15,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 181 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-20 22:48:15,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2022-07-20 22:48:15,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 880. [2022-07-20 22:48:15,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 879 states have (on average 1.4687144482366326) internal successors, (1291), 879 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:15,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1291 transitions. [2022-07-20 22:48:15,947 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1291 transitions. Word has length 189 [2022-07-20 22:48:15,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:48:15,947 INFO L495 AbstractCegarLoop]: Abstraction has 880 states and 1291 transitions. [2022-07-20 22:48:15,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:15,948 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1291 transitions. [2022-07-20 22:48:15,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-07-20 22:48:15,954 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:48:15,954 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-20 22:48:15,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 22:48:15,955 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:48:15,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:48:15,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1976846399, now seen corresponding path program 1 times [2022-07-20 22:48:15,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:48:15,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450492716] [2022-07-20 22:48:15,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:48:15,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:48:16,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:48:16,053 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:48:16,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:48:16,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450492716] [2022-07-20 22:48:16,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450492716] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:48:16,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:48:16,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 22:48:16,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429435812] [2022-07-20 22:48:16,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:48:16,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:48:16,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:48:16,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:48:16,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:48:16,057 INFO L87 Difference]: Start difference. First operand 880 states and 1291 transitions. Second operand has 3 states, 3 states have (on average 64.0) internal successors, (192), 2 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:16,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:48:16,824 INFO L93 Difference]: Finished difference Result 2594 states and 3822 transitions. [2022-07-20 22:48:16,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:48:16,825 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 2 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 192 [2022-07-20 22:48:16,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:48:16,835 INFO L225 Difference]: With dead ends: 2594 [2022-07-20 22:48:16,836 INFO L226 Difference]: Without dead ends: 1716 [2022-07-20 22:48:16,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:48:16,839 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 249 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 22:48:16,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 90 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-20 22:48:16,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2022-07-20 22:48:16,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1696. [2022-07-20 22:48:16,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1696 states, 1695 states have (on average 1.4395280235988202) internal successors, (2440), 1695 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:16,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1696 states to 1696 states and 2440 transitions. [2022-07-20 22:48:16,881 INFO L78 Accepts]: Start accepts. Automaton has 1696 states and 2440 transitions. Word has length 192 [2022-07-20 22:48:16,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:48:16,882 INFO L495 AbstractCegarLoop]: Abstraction has 1696 states and 2440 transitions. [2022-07-20 22:48:16,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 2 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:16,882 INFO L276 IsEmpty]: Start isEmpty. Operand 1696 states and 2440 transitions. [2022-07-20 22:48:16,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-07-20 22:48:16,889 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:48:16,890 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2022-07-20 22:48:16,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-20 22:48:16,890 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:48:16,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:48:16,891 INFO L85 PathProgramCache]: Analyzing trace with hash 2013935212, now seen corresponding path program 1 times [2022-07-20 22:48:16,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:48:16,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103438281] [2022-07-20 22:48:16,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:48:16,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:48:16,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:48:17,145 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 22:48:17,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:48:17,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103438281] [2022-07-20 22:48:17,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103438281] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:48:17,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:48:17,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:48:17,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679107808] [2022-07-20 22:48:17,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:48:17,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:48:17,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:48:17,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:48:17,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:48:17,149 INFO L87 Difference]: Start difference. First operand 1696 states and 2440 transitions. Second operand has 4 states, 4 states have (on average 48.5) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:18,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:48:18,030 INFO L93 Difference]: Finished difference Result 3531 states and 5130 transitions. [2022-07-20 22:48:18,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:48:18,031 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 48.5) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 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 [2022-07-20 22:48:18,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:48:18,037 INFO L225 Difference]: With dead ends: 3531 [2022-07-20 22:48:18,037 INFO L226 Difference]: Without dead ends: 1663 [2022-07-20 22:48:18,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:48:18,040 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 300 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-20 22:48:18,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 47 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-20 22:48:18,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1663 states. [2022-07-20 22:48:18,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1663 to 1663. [2022-07-20 22:48:18,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1663 states, 1662 states have (on average 1.325511432009627) internal successors, (2203), 1662 states have internal predecessors, (2203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:18,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1663 states to 1663 states and 2203 transitions. [2022-07-20 22:48:18,074 INFO L78 Accepts]: Start accepts. Automaton has 1663 states and 2203 transitions. Word has length 199 [2022-07-20 22:48:18,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:48:18,075 INFO L495 AbstractCegarLoop]: Abstraction has 1663 states and 2203 transitions. [2022-07-20 22:48:18,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.5) internal successors, (194), 3 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:18,075 INFO L276 IsEmpty]: Start isEmpty. Operand 1663 states and 2203 transitions. [2022-07-20 22:48:18,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-07-20 22:48:18,079 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:48:18,080 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:48:18,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-20 22:48:18,083 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:48:18,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:48:18,083 INFO L85 PathProgramCache]: Analyzing trace with hash -611089167, now seen corresponding path program 1 times [2022-07-20 22:48:18,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:48:18,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172186693] [2022-07-20 22:48:18,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:48:18,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:48:18,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:48:18,355 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:48:18,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:48:18,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172186693] [2022-07-20 22:48:18,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172186693] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:48:18,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:48:18,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:48:18,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228365763] [2022-07-20 22:48:18,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:48:18,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:48:18,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:48:18,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:48:18,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:48:18,361 INFO L87 Difference]: Start difference. First operand 1663 states and 2203 transitions. Second operand has 4 states, 4 states have (on average 53.75) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:19,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:48:19,356 INFO L93 Difference]: Finished difference Result 4323 states and 5743 transitions. [2022-07-20 22:48:19,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:48:19,357 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.75) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 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 215 [2022-07-20 22:48:19,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:48:19,366 INFO L225 Difference]: With dead ends: 4323 [2022-07-20 22:48:19,367 INFO L226 Difference]: Without dead ends: 2488 [2022-07-20 22:48:19,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:48:19,371 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 195 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 1147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-20 22:48:19,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 94 Invalid, 1147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 994 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-20 22:48:19,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2488 states. [2022-07-20 22:48:19,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2488 to 2487. [2022-07-20 22:48:19,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2487 states, 2486 states have (on average 1.3085277554304102) internal successors, (3253), 2486 states have internal predecessors, (3253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:19,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2487 states to 2487 states and 3253 transitions. [2022-07-20 22:48:19,425 INFO L78 Accepts]: Start accepts. Automaton has 2487 states and 3253 transitions. Word has length 215 [2022-07-20 22:48:19,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:48:19,426 INFO L495 AbstractCegarLoop]: Abstraction has 2487 states and 3253 transitions. [2022-07-20 22:48:19,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.75) internal successors, (215), 3 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:19,426 INFO L276 IsEmpty]: Start isEmpty. Operand 2487 states and 3253 transitions. [2022-07-20 22:48:19,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-07-20 22:48:19,432 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:48:19,433 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:48:19,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-20 22:48:19,433 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:48:19,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:48:19,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1625909836, now seen corresponding path program 1 times [2022-07-20 22:48:19,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:48:19,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747343687] [2022-07-20 22:48:19,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:48:19,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:48:19,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:48:19,508 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-20 22:48:19,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:48:19,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747343687] [2022-07-20 22:48:19,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747343687] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:48:19,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:48:19,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 22:48:19,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486847294] [2022-07-20 22:48:19,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:48:19,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:48:19,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:48:19,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:48:19,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:48:19,511 INFO L87 Difference]: Start difference. First operand 2487 states and 3253 transitions. Second operand has 3 states, 3 states have (on average 71.0) internal successors, (213), 2 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:20,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:48:20,151 INFO L93 Difference]: Finished difference Result 7431 states and 9726 transitions. [2022-07-20 22:48:20,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:48:20,152 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 2 states have internal predecessors, (213), 0 states have call successors, (0), 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 217 [2022-07-20 22:48:20,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:48:20,168 INFO L225 Difference]: With dead ends: 7431 [2022-07-20 22:48:20,169 INFO L226 Difference]: Without dead ends: 4946 [2022-07-20 22:48:20,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:48:20,174 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 204 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:48:20,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 63 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 22:48:20,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4946 states. [2022-07-20 22:48:20,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4946 to 4937. [2022-07-20 22:48:20,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4937 states, 4936 states have (on average 1.2872771474878444) internal successors, (6354), 4936 states have internal predecessors, (6354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:20,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4937 states to 4937 states and 6354 transitions. [2022-07-20 22:48:20,272 INFO L78 Accepts]: Start accepts. Automaton has 4937 states and 6354 transitions. Word has length 217 [2022-07-20 22:48:20,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:48:20,273 INFO L495 AbstractCegarLoop]: Abstraction has 4937 states and 6354 transitions. [2022-07-20 22:48:20,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 2 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:20,273 INFO L276 IsEmpty]: Start isEmpty. Operand 4937 states and 6354 transitions. [2022-07-20 22:48:20,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-07-20 22:48:20,284 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:48:20,284 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:48:20,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-20 22:48:20,285 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:48:20,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:48:20,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1282255010, now seen corresponding path program 1 times [2022-07-20 22:48:20,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:48:20,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789794726] [2022-07-20 22:48:20,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:48:20,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:48:20,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:48:20,377 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 53 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-20 22:48:20,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:48:20,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789794726] [2022-07-20 22:48:20,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789794726] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:48:20,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507027067] [2022-07-20 22:48:20,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:48:20,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:48:20,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:48:20,385 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:48:20,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 22:48:20,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:48:20,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 22:48:20,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:48:20,771 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-20 22:48:20,772 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:48:20,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507027067] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:48:20,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 22:48:20,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-07-20 22:48:20,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719093874] [2022-07-20 22:48:20,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:48:20,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:48:20,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:48:20,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:48:20,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:48:20,776 INFO L87 Difference]: Start difference. First operand 4937 states and 6354 transitions. Second operand has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 2 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) [2022-07-20 22:48:21,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:48:21,001 INFO L93 Difference]: Finished difference Result 14805 states and 19056 transitions. [2022-07-20 22:48:21,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:48:21,002 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 2 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 233 [2022-07-20 22:48:21,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:48:21,040 INFO L225 Difference]: With dead ends: 14805 [2022-07-20 22:48:21,040 INFO L226 Difference]: Without dead ends: 9870 [2022-07-20 22:48:21,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:48:21,051 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 268 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:48:21,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 507 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 22:48:21,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9870 states. [2022-07-20 22:48:21,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9870 to 9868. [2022-07-20 22:48:21,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9868 states, 9867 states have (on average 1.2839768926725448) internal successors, (12669), 9867 states have internal predecessors, (12669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:21,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9868 states to 9868 states and 12669 transitions. [2022-07-20 22:48:21,248 INFO L78 Accepts]: Start accepts. Automaton has 9868 states and 12669 transitions. Word has length 233 [2022-07-20 22:48:21,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:48:21,249 INFO L495 AbstractCegarLoop]: Abstraction has 9868 states and 12669 transitions. [2022-07-20 22:48:21,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 2 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) [2022-07-20 22:48:21,249 INFO L276 IsEmpty]: Start isEmpty. Operand 9868 states and 12669 transitions. [2022-07-20 22:48:21,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2022-07-20 22:48:21,267 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:48:21,267 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:48:21,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-20 22:48:21,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:48:21,488 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:48:21,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:48:21,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1372364853, now seen corresponding path program 1 times [2022-07-20 22:48:21,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:48:21,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741415361] [2022-07-20 22:48:21,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:48:21,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:48:21,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:48:21,631 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 62 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-20 22:48:21,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:48:21,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741415361] [2022-07-20 22:48:21,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741415361] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:48:21,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922803848] [2022-07-20 22:48:21,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:48:21,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:48:21,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:48:21,634 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:48:21,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 22:48:21,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:48:21,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 22:48:21,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:48:22,067 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-20 22:48:22,068 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:48:22,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922803848] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:48:22,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 22:48:22,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-20 22:48:22,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088772992] [2022-07-20 22:48:22,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:48:22,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:48:22,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:48:22,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:48:22,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:48:22,071 INFO L87 Difference]: Start difference. First operand 9868 states and 12669 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:22,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:48:22,754 INFO L93 Difference]: Finished difference Result 24679 states and 31789 transitions. [2022-07-20 22:48:22,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:48:22,755 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 241 [2022-07-20 22:48:22,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:48:22,797 INFO L225 Difference]: With dead ends: 24679 [2022-07-20 22:48:22,798 INFO L226 Difference]: Without dead ends: 14813 [2022-07-20 22:48:22,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:48:22,815 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 74 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:48:22,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 106 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 22:48:22,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14813 states. [2022-07-20 22:48:23,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14813 to 14801. [2022-07-20 22:48:23,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14801 states, 14800 states have (on average 1.262027027027027) internal successors, (18678), 14800 states have internal predecessors, (18678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:23,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14801 states to 14801 states and 18678 transitions. [2022-07-20 22:48:23,134 INFO L78 Accepts]: Start accepts. Automaton has 14801 states and 18678 transitions. Word has length 241 [2022-07-20 22:48:23,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:48:23,135 INFO L495 AbstractCegarLoop]: Abstraction has 14801 states and 18678 transitions. [2022-07-20 22:48:23,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:23,136 INFO L276 IsEmpty]: Start isEmpty. Operand 14801 states and 18678 transitions. [2022-07-20 22:48:23,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2022-07-20 22:48:23,168 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:48:23,168 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2022-07-20 22:48:23,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 22:48:23,387 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,SelfDestructingSolverStorable7 [2022-07-20 22:48:23,388 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:48:23,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:48:23,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1700715822, now seen corresponding path program 1 times [2022-07-20 22:48:23,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:48:23,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644344124] [2022-07-20 22:48:23,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:48:23,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:48:23,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:48:23,470 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-20 22:48:23,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:48:23,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644344124] [2022-07-20 22:48:23,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644344124] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:48:23,471 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:48:23,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 22:48:23,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230862355] [2022-07-20 22:48:23,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:48:23,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:48:23,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:48:23,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:48:23,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:48:23,475 INFO L87 Difference]: Start difference. First operand 14801 states and 18678 transitions. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:24,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:48:24,269 INFO L93 Difference]: Finished difference Result 44216 states and 55778 transitions. [2022-07-20 22:48:24,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:48:24,270 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 states have internal predecessors, (198), 0 states have call successors, (0), 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 244 [2022-07-20 22:48:24,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:48:24,327 INFO L225 Difference]: With dead ends: 44216 [2022-07-20 22:48:24,327 INFO L226 Difference]: Without dead ends: 29417 [2022-07-20 22:48:24,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:48:24,354 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 204 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:48:24,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 127 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 22:48:24,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29417 states. [2022-07-20 22:48:24,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29417 to 29417. [2022-07-20 22:48:24,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29417 states, 29416 states have (on average 1.1694316018493336) internal successors, (34400), 29416 states have internal predecessors, (34400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:24,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29417 states to 29417 states and 34400 transitions. [2022-07-20 22:48:24,886 INFO L78 Accepts]: Start accepts. Automaton has 29417 states and 34400 transitions. Word has length 244 [2022-07-20 22:48:24,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:48:24,886 INFO L495 AbstractCegarLoop]: Abstraction has 29417 states and 34400 transitions. [2022-07-20 22:48:24,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:24,887 INFO L276 IsEmpty]: Start isEmpty. Operand 29417 states and 34400 transitions. [2022-07-20 22:48:24,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2022-07-20 22:48:24,918 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:48:24,918 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:48:24,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-20 22:48:24,919 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:48:24,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:48:24,920 INFO L85 PathProgramCache]: Analyzing trace with hash 216253889, now seen corresponding path program 1 times [2022-07-20 22:48:24,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:48:24,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604958421] [2022-07-20 22:48:24,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:48:24,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:48:24,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:48:25,119 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 66 proven. 6 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-20 22:48:25,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:48:25,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604958421] [2022-07-20 22:48:25,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604958421] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:48:25,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395251318] [2022-07-20 22:48:25,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:48:25,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:48:25,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:48:25,128 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) [2022-07-20 22:48:25,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 22:48:25,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:48:25,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 22:48:25,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:48:25,365 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-20 22:48:25,365 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:48:25,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395251318] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:48:25,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 22:48:25,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-20 22:48:25,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019335561] [2022-07-20 22:48:25,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:48:25,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:48:25,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:48:25,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:48:25,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:48:25,368 INFO L87 Difference]: Start difference. First operand 29417 states and 34400 transitions. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:26,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:48:26,176 INFO L93 Difference]: Finished difference Result 55819 states and 65588 transitions. [2022-07-20 22:48:26,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:48:26,177 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 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 245 [2022-07-20 22:48:26,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:48:26,235 INFO L225 Difference]: With dead ends: 55819 [2022-07-20 22:48:26,235 INFO L226 Difference]: Without dead ends: 26404 [2022-07-20 22:48:26,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:48:26,263 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 191 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:48:26,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 287 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 22:48:26,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26404 states. [2022-07-20 22:48:26,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26404 to 26372. [2022-07-20 22:48:26,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26372 states, 26371 states have (on average 1.1672670736794206) internal successors, (30782), 26371 states have internal predecessors, (30782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:26,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26372 states to 26372 states and 30782 transitions. [2022-07-20 22:48:26,656 INFO L78 Accepts]: Start accepts. Automaton has 26372 states and 30782 transitions. Word has length 245 [2022-07-20 22:48:26,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:48:26,657 INFO L495 AbstractCegarLoop]: Abstraction has 26372 states and 30782 transitions. [2022-07-20 22:48:26,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:26,657 INFO L276 IsEmpty]: Start isEmpty. Operand 26372 states and 30782 transitions. [2022-07-20 22:48:26,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-07-20 22:48:26,689 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:48:26,690 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-20 22:48:26,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 22:48:26,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:48:26,915 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:48:26,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:48:26,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1597815934, now seen corresponding path program 1 times [2022-07-20 22:48:26,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:48:26,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133988270] [2022-07-20 22:48:26,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:48:26,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:48:27,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:48:27,132 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-20 22:48:27,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:48:27,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133988270] [2022-07-20 22:48:27,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133988270] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:48:27,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556858438] [2022-07-20 22:48:27,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:48:27,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:48:27,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:48:27,135 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) [2022-07-20 22:48:27,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 22:48:27,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:48:27,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 22:48:27,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:48:27,350 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 22:48:27,351 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:48:27,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556858438] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:48:27,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 22:48:27,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-20 22:48:27,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523232867] [2022-07-20 22:48:27,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:48:27,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:48:27,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:48:27,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:48:27,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:48:27,354 INFO L87 Difference]: Start difference. First operand 26372 states and 30782 transitions. Second operand has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:28,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:48:28,346 INFO L93 Difference]: Finished difference Result 63712 states and 75538 transitions. [2022-07-20 22:48:28,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:48:28,347 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 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 254 [2022-07-20 22:48:28,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:48:28,413 INFO L225 Difference]: With dead ends: 63712 [2022-07-20 22:48:28,414 INFO L226 Difference]: Without dead ends: 37342 [2022-07-20 22:48:28,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:48:28,431 INFO L413 NwaCegarLoop]: 312 mSDtfsCounter, 185 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:48:28,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 333 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 22:48:28,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37342 states. [2022-07-20 22:48:28,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37342 to 37334. [2022-07-20 22:48:28,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37334 states, 37333 states have (on average 1.1299922320735007) internal successors, (42186), 37333 states have internal predecessors, (42186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:28,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37334 states to 37334 states and 42186 transitions. [2022-07-20 22:48:28,980 INFO L78 Accepts]: Start accepts. Automaton has 37334 states and 42186 transitions. Word has length 254 [2022-07-20 22:48:28,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:48:28,980 INFO L495 AbstractCegarLoop]: Abstraction has 37334 states and 42186 transitions. [2022-07-20 22:48:28,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.0) internal successors, (249), 3 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:28,981 INFO L276 IsEmpty]: Start isEmpty. Operand 37334 states and 42186 transitions. [2022-07-20 22:48:29,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2022-07-20 22:48:29,023 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:48:29,023 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:48:29,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 22:48:29,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:48:29,250 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:48:29,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:48:29,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1093536924, now seen corresponding path program 1 times [2022-07-20 22:48:29,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:48:29,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585093606] [2022-07-20 22:48:29,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:48:29,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:48:29,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:48:29,361 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 111 proven. 6 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-07-20 22:48:29,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:48:29,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585093606] [2022-07-20 22:48:29,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585093606] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:48:29,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091120540] [2022-07-20 22:48:29,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:48:29,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:48:29,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:48:29,364 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) [2022-07-20 22:48:29,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 22:48:29,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:48:29,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 22:48:29,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:48:29,586 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-20 22:48:29,586 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:48:29,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091120540] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:48:29,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 22:48:29,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-20 22:48:29,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50430031] [2022-07-20 22:48:29,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:48:29,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:48:29,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:48:29,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:48:29,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:48:29,591 INFO L87 Difference]: Start difference. First operand 37334 states and 42186 transitions. Second operand has 3 states, 3 states have (on average 87.33333333333333) 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) [2022-07-20 22:48:30,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:48:30,439 INFO L93 Difference]: Finished difference Result 73212 states and 82800 transitions. [2022-07-20 22:48:30,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:48:30,440 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.33333333333333) 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 297 [2022-07-20 22:48:30,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:48:30,500 INFO L225 Difference]: With dead ends: 73212 [2022-07-20 22:48:30,500 INFO L226 Difference]: Without dead ends: 36286 [2022-07-20 22:48:30,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:48:30,538 INFO L413 NwaCegarLoop]: 292 mSDtfsCounter, 208 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:48:30,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 312 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 22:48:30,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36286 states. [2022-07-20 22:48:31,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36286 to 36274. [2022-07-20 22:48:31,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36274 states, 36273 states have (on average 1.1095029360681499) internal successors, (40245), 36273 states have internal predecessors, (40245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:31,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36274 states to 36274 states and 40245 transitions. [2022-07-20 22:48:31,140 INFO L78 Accepts]: Start accepts. Automaton has 36274 states and 40245 transitions. Word has length 297 [2022-07-20 22:48:31,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:48:31,140 INFO L495 AbstractCegarLoop]: Abstraction has 36274 states and 40245 transitions. [2022-07-20 22:48:31,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.33333333333333) 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) [2022-07-20 22:48:31,141 INFO L276 IsEmpty]: Start isEmpty. Operand 36274 states and 40245 transitions. [2022-07-20 22:48:31,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2022-07-20 22:48:31,184 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:48:31,185 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:48:31,214 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-20 22:48:31,411 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,SelfDestructingSolverStorable11 [2022-07-20 22:48:31,412 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:48:31,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:48:31,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1039532014, now seen corresponding path program 1 times [2022-07-20 22:48:31,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:48:31,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050530890] [2022-07-20 22:48:31,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:48:31,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:48:31,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:48:31,846 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 121 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:48:31,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:48:31,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050530890] [2022-07-20 22:48:31,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050530890] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:48:31,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058658790] [2022-07-20 22:48:31,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:48:31,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:48:31,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:48:31,852 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) [2022-07-20 22:48:31,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 22:48:32,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:48:32,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 22:48:32,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:48:32,225 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 22:48:32,225 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:48:32,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058658790] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:48:32,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 22:48:32,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2022-07-20 22:48:32,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750720120] [2022-07-20 22:48:32,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:48:32,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:48:32,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:48:32,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:48:32,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-20 22:48:32,228 INFO L87 Difference]: Start difference. First operand 36274 states and 40245 transitions. Second operand has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:33,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:48:33,024 INFO L93 Difference]: Finished difference Result 77020 states and 85888 transitions. [2022-07-20 22:48:33,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:48:33,027 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 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 314 [2022-07-20 22:48:33,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:48:33,080 INFO L225 Difference]: With dead ends: 77020 [2022-07-20 22:48:33,080 INFO L226 Difference]: Without dead ends: 41154 [2022-07-20 22:48:33,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-20 22:48:33,103 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 79 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:48:33,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 282 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 22:48:33,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41154 states. [2022-07-20 22:48:33,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41154 to 41146. [2022-07-20 22:48:33,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41146 states, 41145 states have (on average 1.1140600315955766) internal successors, (45838), 41145 states have internal predecessors, (45838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:33,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41146 states to 41146 states and 45838 transitions. [2022-07-20 22:48:33,737 INFO L78 Accepts]: Start accepts. Automaton has 41146 states and 45838 transitions. Word has length 314 [2022-07-20 22:48:33,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:48:33,738 INFO L495 AbstractCegarLoop]: Abstraction has 41146 states and 45838 transitions. [2022-07-20 22:48:33,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:33,738 INFO L276 IsEmpty]: Start isEmpty. Operand 41146 states and 45838 transitions. [2022-07-20 22:48:33,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2022-07-20 22:48:33,777 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:48:33,777 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:48:33,794 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-20 22:48:33,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:48:33,978 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:48:33,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:48:33,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1562967734, now seen corresponding path program 1 times [2022-07-20 22:48:33,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:48:33,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72303838] [2022-07-20 22:48:33,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:48:33,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:48:34,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:48:34,213 INFO L134 CoverageAnalysis]: Checked inductivity of 419 backedges. 195 proven. 0 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-07-20 22:48:34,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:48:34,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72303838] [2022-07-20 22:48:34,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72303838] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:48:34,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:48:34,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 22:48:34,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335106749] [2022-07-20 22:48:34,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:48:34,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:48:34,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:48:34,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:48:34,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:48:34,217 INFO L87 Difference]: Start difference. First operand 41146 states and 45838 transitions. Second operand has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 2 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:35,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:48:35,075 INFO L93 Difference]: Finished difference Result 94721 states and 105590 transitions. [2022-07-20 22:48:35,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:48:35,076 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 2 states have internal predecessors, (263), 0 states have call successors, (0), 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 384 [2022-07-20 22:48:35,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:48:35,162 INFO L225 Difference]: With dead ends: 94721 [2022-07-20 22:48:35,162 INFO L226 Difference]: Without dead ends: 53983 [2022-07-20 22:48:35,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:48:35,203 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 155 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:48:35,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 126 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 22:48:35,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53983 states. [2022-07-20 22:48:35,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53983 to 49475. [2022-07-20 22:48:35,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49475 states, 49474 states have (on average 1.1135545943323766) internal successors, (55092), 49474 states have internal predecessors, (55092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:36,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49475 states to 49475 states and 55092 transitions. [2022-07-20 22:48:36,014 INFO L78 Accepts]: Start accepts. Automaton has 49475 states and 55092 transitions. Word has length 384 [2022-07-20 22:48:36,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:48:36,014 INFO L495 AbstractCegarLoop]: Abstraction has 49475 states and 55092 transitions. [2022-07-20 22:48:36,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 2 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:36,015 INFO L276 IsEmpty]: Start isEmpty. Operand 49475 states and 55092 transitions. [2022-07-20 22:48:36,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2022-07-20 22:48:36,061 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:48:36,061 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:48:36,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-20 22:48:36,061 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:48:36,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:48:36,062 INFO L85 PathProgramCache]: Analyzing trace with hash -493270935, now seen corresponding path program 1 times [2022-07-20 22:48:36,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:48:36,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863490423] [2022-07-20 22:48:36,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:48:36,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:48:36,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:48:36,345 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 204 proven. 6 refuted. 0 times theorem prover too weak. 443 trivial. 0 not checked. [2022-07-20 22:48:36,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:48:36,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863490423] [2022-07-20 22:48:36,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863490423] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:48:36,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63782097] [2022-07-20 22:48:36,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:48:36,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:48:36,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:48:36,348 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) [2022-07-20 22:48:36,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-20 22:48:36,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:48:36,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 834 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 22:48:36,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:48:36,719 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 416 proven. 0 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2022-07-20 22:48:36,719 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:48:36,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63782097] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:48:36,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 22:48:36,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-20 22:48:36,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421888586] [2022-07-20 22:48:36,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:48:36,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:48:36,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:48:36,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:48:36,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:48:36,722 INFO L87 Difference]: Start difference. First operand 49475 states and 55092 transitions. Second operand has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:37,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:48:37,246 INFO L93 Difference]: Finished difference Result 137642 states and 153225 transitions. [2022-07-20 22:48:37,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:48:37,247 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 414 [2022-07-20 22:48:37,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:48:37,344 INFO L225 Difference]: With dead ends: 137642 [2022-07-20 22:48:37,344 INFO L226 Difference]: Without dead ends: 88981 [2022-07-20 22:48:37,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:48:37,384 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 228 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:48:37,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 497 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 22:48:37,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88981 states. [2022-07-20 22:48:38,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88981 to 88976. [2022-07-20 22:48:38,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88976 states, 88975 states have (on average 1.111851643720146) internal successors, (98927), 88975 states have internal predecessors, (98927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:38,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88976 states to 88976 states and 98927 transitions. [2022-07-20 22:48:38,674 INFO L78 Accepts]: Start accepts. Automaton has 88976 states and 98927 transitions. Word has length 414 [2022-07-20 22:48:38,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:48:38,675 INFO L495 AbstractCegarLoop]: Abstraction has 88976 states and 98927 transitions. [2022-07-20 22:48:38,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:38,675 INFO L276 IsEmpty]: Start isEmpty. Operand 88976 states and 98927 transitions. [2022-07-20 22:48:38,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2022-07-20 22:48:38,769 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:48:38,769 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2022-07-20 22:48:38,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-20 22:48:38,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:48:38,970 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:48:38,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:48:38,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1425788597, now seen corresponding path program 1 times [2022-07-20 22:48:38,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:48:38,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063812981] [2022-07-20 22:48:38,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:48:38,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:48:39,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:48:39,085 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 190 proven. 6 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-07-20 22:48:39,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:48:39,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063812981] [2022-07-20 22:48:39,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063812981] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:48:39,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437034261] [2022-07-20 22:48:39,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:48:39,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:48:39,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:48:39,088 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:48:39,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-20 22:48:39,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:48:39,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 22:48:39,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:48:39,391 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 475 proven. 0 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2022-07-20 22:48:39,391 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:48:39,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437034261] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:48:39,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 22:48:39,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-20 22:48:39,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886109663] [2022-07-20 22:48:39,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:48:39,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:48:39,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:48:39,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:48:39,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:48:39,393 INFO L87 Difference]: Start difference. First operand 88976 states and 98927 transitions. Second operand has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:40,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:48:40,391 INFO L93 Difference]: Finished difference Result 177153 states and 197026 transitions. [2022-07-20 22:48:40,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:48:40,391 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 420 [2022-07-20 22:48:40,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:48:40,528 INFO L225 Difference]: With dead ends: 177153 [2022-07-20 22:48:40,529 INFO L226 Difference]: Without dead ends: 88991 [2022-07-20 22:48:40,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 419 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:48:40,578 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 159 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:48:40,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 113 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 22:48:40,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88991 states. [2022-07-20 22:48:41,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88991 to 88976. [2022-07-20 22:48:41,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88976 states, 88975 states have (on average 1.0987693172239392) internal successors, (97763), 88975 states have internal predecessors, (97763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:41,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88976 states to 88976 states and 97763 transitions. [2022-07-20 22:48:41,844 INFO L78 Accepts]: Start accepts. Automaton has 88976 states and 97763 transitions. Word has length 420 [2022-07-20 22:48:41,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:48:41,845 INFO L495 AbstractCegarLoop]: Abstraction has 88976 states and 97763 transitions. [2022-07-20 22:48:41,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:41,845 INFO L276 IsEmpty]: Start isEmpty. Operand 88976 states and 97763 transitions. [2022-07-20 22:48:41,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2022-07-20 22:48:41,923 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:48:41,924 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:48:41,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-20 22:48:42,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-20 22:48:42,125 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:48:42,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:48:42,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1785867775, now seen corresponding path program 1 times [2022-07-20 22:48:42,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:48:42,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542843698] [2022-07-20 22:48:42,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:48:42,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:48:42,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:48:42,497 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 269 proven. 95 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-20 22:48:42,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:48:42,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542843698] [2022-07-20 22:48:42,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542843698] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:48:42,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126779977] [2022-07-20 22:48:42,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:48:42,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:48:42,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:48:42,500 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:48:42,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-20 22:48:42,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:48:42,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 22:48:42,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:48:43,054 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 364 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-20 22:48:43,055 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:48:43,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126779977] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:48:43,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 22:48:43,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2022-07-20 22:48:43,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079769503] [2022-07-20 22:48:43,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:48:43,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:48:43,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:48:43,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:48:43,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-20 22:48:43,057 INFO L87 Difference]: Start difference. First operand 88976 states and 97763 transitions. Second operand has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:43,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:48:43,913 INFO L93 Difference]: Finished difference Result 167122 states and 183334 transitions. [2022-07-20 22:48:43,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:48:43,914 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 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 423 [2022-07-20 22:48:43,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:48:44,239 INFO L225 Difference]: With dead ends: 167122 [2022-07-20 22:48:44,240 INFO L226 Difference]: Without dead ends: 78960 [2022-07-20 22:48:44,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 422 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-20 22:48:44,277 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 132 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:48:44,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 303 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 22:48:44,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78960 states. [2022-07-20 22:48:45,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78960 to 75911. [2022-07-20 22:48:45,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75911 states, 75910 states have (on average 1.0786325912264523) internal successors, (81879), 75910 states have internal predecessors, (81879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:45,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75911 states to 75911 states and 81879 transitions. [2022-07-20 22:48:45,338 INFO L78 Accepts]: Start accepts. Automaton has 75911 states and 81879 transitions. Word has length 423 [2022-07-20 22:48:45,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:48:45,338 INFO L495 AbstractCegarLoop]: Abstraction has 75911 states and 81879 transitions. [2022-07-20 22:48:45,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:45,339 INFO L276 IsEmpty]: Start isEmpty. Operand 75911 states and 81879 transitions. [2022-07-20 22:48:45,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2022-07-20 22:48:45,407 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:48:45,407 INFO L195 NwaCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:48:45,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-20 22:48:45,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-20 22:48:45,609 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:48:45,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:48:45,609 INFO L85 PathProgramCache]: Analyzing trace with hash 787184307, now seen corresponding path program 1 times [2022-07-20 22:48:45,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:48:45,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461733867] [2022-07-20 22:48:45,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:48:45,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:48:45,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:48:45,740 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 236 proven. 0 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-07-20 22:48:45,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:48:45,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461733867] [2022-07-20 22:48:45,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461733867] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:48:45,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:48:45,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:48:45,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487418157] [2022-07-20 22:48:45,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:48:45,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:48:45,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:48:45,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:48:45,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:48:45,743 INFO L87 Difference]: Start difference. First operand 75911 states and 81879 transitions. Second operand has 4 states, 4 states have (on average 72.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:47,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:48:47,215 INFO L93 Difference]: Finished difference Result 158997 states and 171829 transitions. [2022-07-20 22:48:47,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:48:47,216 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 72.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 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 429 [2022-07-20 22:48:47,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:48:47,332 INFO L225 Difference]: With dead ends: 158997 [2022-07-20 22:48:47,332 INFO L226 Difference]: Without dead ends: 84103 [2022-07-20 22:48:47,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:48:47,358 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 341 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1073 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-20 22:48:47,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [341 Valid, 110 Invalid, 1171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1073 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-20 22:48:47,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84103 states. [2022-07-20 22:48:48,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84103 to 84063. [2022-07-20 22:48:48,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84063 states, 84062 states have (on average 1.0770859603625895) internal successors, (90542), 84062 states have internal predecessors, (90542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:48,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84063 states to 84063 states and 90542 transitions. [2022-07-20 22:48:48,391 INFO L78 Accepts]: Start accepts. Automaton has 84063 states and 90542 transitions. Word has length 429 [2022-07-20 22:48:48,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:48:48,392 INFO L495 AbstractCegarLoop]: Abstraction has 84063 states and 90542 transitions. [2022-07-20 22:48:48,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:48,392 INFO L276 IsEmpty]: Start isEmpty. Operand 84063 states and 90542 transitions. [2022-07-20 22:48:48,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 454 [2022-07-20 22:48:48,465 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:48:48,465 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2022-07-20 22:48:48,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-20 22:48:48,466 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:48:48,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:48:48,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1288204574, now seen corresponding path program 1 times [2022-07-20 22:48:48,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:48:48,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642736552] [2022-07-20 22:48:48,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:48:48,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:48:48,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:48:48,624 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 311 proven. 29 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-07-20 22:48:48,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:48:48,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642736552] [2022-07-20 22:48:48,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642736552] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:48:48,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171212496] [2022-07-20 22:48:48,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:48:48,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:48:48,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:48:48,626 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 22:48:48,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-20 22:48:48,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:48:48,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 742 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 22:48:48,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:48:49,096 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 340 proven. 0 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-07-20 22:48:49,106 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:48:49,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171212496] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:48:49,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 22:48:49,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-20 22:48:49,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428203992] [2022-07-20 22:48:49,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:48:49,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:48:49,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:48:49,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:48:49,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:48:49,110 INFO L87 Difference]: Start difference. First operand 84063 states and 90542 transitions. Second operand has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:49,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:48:49,983 INFO L93 Difference]: Finished difference Result 159995 states and 172351 transitions. [2022-07-20 22:48:49,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:48:49,983 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 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 453 [2022-07-20 22:48:49,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:48:50,091 INFO L225 Difference]: With dead ends: 159995 [2022-07-20 22:48:50,091 INFO L226 Difference]: Without dead ends: 76949 [2022-07-20 22:48:50,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 452 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:48:50,151 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 209 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 22:48:50,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 295 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 22:48:50,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76949 states. [2022-07-20 22:48:51,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76949 to 70843. [2022-07-20 22:48:51,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70843 states, 70842 states have (on average 1.0643403630614607) internal successors, (75400), 70842 states have internal predecessors, (75400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:51,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70843 states to 70843 states and 75400 transitions. [2022-07-20 22:48:51,286 INFO L78 Accepts]: Start accepts. Automaton has 70843 states and 75400 transitions. Word has length 453 [2022-07-20 22:48:51,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:48:51,287 INFO L495 AbstractCegarLoop]: Abstraction has 70843 states and 75400 transitions. [2022-07-20 22:48:51,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 104.0) internal successors, (312), 3 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:51,287 INFO L276 IsEmpty]: Start isEmpty. Operand 70843 states and 75400 transitions. [2022-07-20 22:48:51,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2022-07-20 22:48:51,358 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:48:51,359 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-20 22:48:51,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-20 22:48:51,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:48:51,568 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:48:51,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:48:51,568 INFO L85 PathProgramCache]: Analyzing trace with hash 236642471, now seen corresponding path program 1 times [2022-07-20 22:48:51,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:48:51,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401997902] [2022-07-20 22:48:51,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:48:51,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:48:51,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:48:51,772 INFO L134 CoverageAnalysis]: Checked inductivity of 535 backedges. 473 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-07-20 22:48:51,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:48:51,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401997902] [2022-07-20 22:48:51,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401997902] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:48:51,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:48:51,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:48:51,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282728228] [2022-07-20 22:48:51,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:48:51,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:48:51,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:48:51,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:48:51,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:48:51,777 INFO L87 Difference]: Start difference. First operand 70843 states and 75400 transitions. Second operand has 4 states, 4 states have (on average 103.25) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:53,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:48:53,137 INFO L93 Difference]: Finished difference Result 198448 states and 211001 transitions. [2022-07-20 22:48:53,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:48:53,137 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 103.25) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 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 473 [2022-07-20 22:48:53,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:48:53,321 INFO L225 Difference]: With dead ends: 198448 [2022-07-20 22:48:53,321 INFO L226 Difference]: Without dead ends: 128622 [2022-07-20 22:48:53,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:48:53,373 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 313 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-20 22:48:53,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 431 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-20 22:48:53,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128622 states. [2022-07-20 22:48:55,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128622 to 122108. [2022-07-20 22:48:55,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122108 states, 122107 states have (on average 1.0633051340218005) internal successors, (129837), 122107 states have internal predecessors, (129837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:55,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122108 states to 122108 states and 129837 transitions. [2022-07-20 22:48:55,414 INFO L78 Accepts]: Start accepts. Automaton has 122108 states and 129837 transitions. Word has length 473 [2022-07-20 22:48:55,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:48:55,414 INFO L495 AbstractCegarLoop]: Abstraction has 122108 states and 129837 transitions. [2022-07-20 22:48:55,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.25) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:55,415 INFO L276 IsEmpty]: Start isEmpty. Operand 122108 states and 129837 transitions. [2022-07-20 22:48:55,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2022-07-20 22:48:55,511 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:48:55,511 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-20 22:48:55,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-20 22:48:55,512 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:48:55,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:48:55,512 INFO L85 PathProgramCache]: Analyzing trace with hash 65683284, now seen corresponding path program 1 times [2022-07-20 22:48:55,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:48:55,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535174423] [2022-07-20 22:48:55,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:48:55,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:48:55,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:48:55,781 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 570 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-20 22:48:55,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:48:55,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535174423] [2022-07-20 22:48:55,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535174423] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:48:55,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:48:55,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:48:55,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391010127] [2022-07-20 22:48:55,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:48:55,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:48:55,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:48:55,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:48:55,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:48:55,785 INFO L87 Difference]: Start difference. First operand 122108 states and 129837 transitions. Second operand has 4 states, 4 states have (on average 117.25) internal successors, (469), 4 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:57,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:48:57,581 INFO L93 Difference]: Finished difference Result 273746 states and 291742 transitions. [2022-07-20 22:48:57,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:48:57,582 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 117.25) internal successors, (469), 4 states have internal predecessors, (469), 0 states have call successors, (0), 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 505 [2022-07-20 22:48:57,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:48:57,582 INFO L225 Difference]: With dead ends: 273746 [2022-07-20 22:48:57,582 INFO L226 Difference]: Without dead ends: 0 [2022-07-20 22:48:57,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:48:57,663 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 302 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 1178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-20 22:48:57,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 100 Invalid, 1178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 1006 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-20 22:48:57,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-20 22:48:57,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-20 22:48:57,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:57,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-20 22:48:57,664 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 505 [2022-07-20 22:48:57,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:48:57,665 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-20 22:48:57,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 117.25) internal successors, (469), 4 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:57,665 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-20 22:48:57,665 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-20 22:48:57,667 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-20 22:48:57,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-20 22:48:57,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.