./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem03_label25.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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_label25.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 6036572cc480aba1617ffcf5de0f96e18071f7d06d6847cfbda5ebab0921c496 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 11:11:50,991 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 11:11:50,992 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 11:11:51,021 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 11:11:51,021 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 11:11:51,024 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 11:11:51,025 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 11:11:51,029 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 11:11:51,030 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 11:11:51,035 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 11:11:51,036 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 11:11:51,037 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 11:11:51,037 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 11:11:51,039 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 11:11:51,040 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 11:11:51,042 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 11:11:51,044 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 11:11:51,046 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 11:11:51,048 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 11:11:51,053 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 11:11:51,054 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 11:11:51,057 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 11:11:51,058 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 11:11:51,059 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 11:11:51,060 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 11:11:51,065 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 11:11:51,065 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 11:11:51,065 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 11:11:51,066 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 11:11:51,068 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 11:11:51,068 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 11:11:51,069 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 11:11:51,070 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 11:11:51,071 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 11:11:51,071 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 11:11:51,072 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 11:11:51,073 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 11:11:51,073 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 11:11:51,073 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 11:11:51,074 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 11:11:51,074 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 11:11:51,075 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 11:11:51,077 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 11:11:51,109 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 11:11:51,109 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 11:11:51,110 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 11:11:51,110 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 11:11:51,110 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 11:11:51,111 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 11:11:51,111 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 11:11:51,111 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 11:11:51,112 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 11:11:51,112 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 11:11:51,113 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 11:11:51,113 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 11:11:51,113 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 11:11:51,113 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 11:11:51,113 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 11:11:51,113 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 11:11:51,114 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 11:11:51,114 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 11:11:51,114 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 11:11:51,119 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 11:11:51,119 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 11:11:51,119 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 11:11:51,120 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 11:11:51,120 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 11:11:51,120 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 11:11:51,120 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 11:11:51,120 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 11:11:51,121 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 11:11:51,121 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 11:11:51,121 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 11:11:51,121 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 11:11:51,121 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 11:11:51,122 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 11:11:51,122 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6036572cc480aba1617ffcf5de0f96e18071f7d06d6847cfbda5ebab0921c496 [2022-07-19 11:11:51,372 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 11:11:51,394 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 11:11:51,396 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 11:11:51,397 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 11:11:51,397 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 11:11:51,398 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label25.c [2022-07-19 11:11:51,463 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/674ee0b67/25cf470abc084055b6a2118c81d5a76f/FLAGa244e3270 [2022-07-19 11:11:52,064 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 11:11:52,065 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label25.c [2022-07-19 11:11:52,079 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/674ee0b67/25cf470abc084055b6a2118c81d5a76f/FLAGa244e3270 [2022-07-19 11:11:52,460 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/674ee0b67/25cf470abc084055b6a2118c81d5a76f [2022-07-19 11:11:52,462 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 11:11:52,463 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 11:11:52,467 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 11:11:52,468 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 11:11:52,470 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 11:11:52,471 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:11:52" (1/1) ... [2022-07-19 11:11:52,472 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e5ca6c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:11:52, skipping insertion in model container [2022-07-19 11:11:52,472 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:11:52" (1/1) ... [2022-07-19 11:11:52,478 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 11:11:52,537 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 11:11:52,979 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_label25.c[58529,58542] [2022-07-19 11:11:53,009 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 11:11:53,019 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 11:11:53,212 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_label25.c[58529,58542] [2022-07-19 11:11:53,224 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 11:11:53,239 INFO L208 MainTranslator]: Completed translation [2022-07-19 11:11:53,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:11:53 WrapperNode [2022-07-19 11:11:53,240 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 11:11:53,241 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 11:11:53,242 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 11:11:53,242 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 11:11:53,248 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:11:53" (1/1) ... [2022-07-19 11:11:53,282 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:11:53" (1/1) ... [2022-07-19 11:11:53,351 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-07-19 11:11:53,351 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 11:11:53,352 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 11:11:53,352 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 11:11:53,352 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 11:11:53,360 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:11:53" (1/1) ... [2022-07-19 11:11:53,360 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:11:53" (1/1) ... [2022-07-19 11:11:53,369 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:11:53" (1/1) ... [2022-07-19 11:11:53,369 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:11:53" (1/1) ... [2022-07-19 11:11:53,418 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:11:53" (1/1) ... [2022-07-19 11:11:53,436 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:11:53" (1/1) ... [2022-07-19 11:11:53,445 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:11:53" (1/1) ... [2022-07-19 11:11:53,454 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 11:11:53,456 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 11:11:53,457 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 11:11:53,457 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 11:11:53,458 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:11:53" (1/1) ... [2022-07-19 11:11:53,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 11:11:53,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:11:53,496 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) [2022-07-19 11:11:53,503 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 [2022-07-19 11:11:53,530 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 11:11:53,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 11:11:53,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 11:11:53,530 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 11:11:53,637 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 11:11:53,638 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 11:11:55,065 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 11:11:55,084 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 11:11:55,085 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-19 11:11:55,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:11:55 BoogieIcfgContainer [2022-07-19 11:11:55,088 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 11:11:55,090 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 11:11:55,090 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 11:11:55,093 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 11:11:55,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 11:11:52" (1/3) ... [2022-07-19 11:11:55,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bbc810b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:11:55, skipping insertion in model container [2022-07-19 11:11:55,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:11:53" (2/3) ... [2022-07-19 11:11:55,095 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bbc810b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:11:55, skipping insertion in model container [2022-07-19 11:11:55,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:11:55" (3/3) ... [2022-07-19 11:11:55,096 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label25.c [2022-07-19 11:11:55,108 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 11:11:55,108 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 11:11:55,153 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 11:11:55,159 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@778fd9fd, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1054109b [2022-07-19 11:11:55,159 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 11:11:55,165 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) [2022-07-19 11:11:55,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-07-19 11:11:55,180 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:11:55,180 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] [2022-07-19 11:11:55,181 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:11:55,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:11:55,185 INFO L85 PathProgramCache]: Analyzing trace with hash 724714706, now seen corresponding path program 1 times [2022-07-19 11:11:55,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:11:55,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945233182] [2022-07-19 11:11:55,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:11:55,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:11:55,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:11:55,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:11:55,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:11:55,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945233182] [2022-07-19 11:11:55,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945233182] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:11:55,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:11:55,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 11:11:55,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531633055] [2022-07-19 11:11:55,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:11:55,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:11:55,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:11:55,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:11:55,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:11:55,737 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 60.0) internal successors, (180), 2 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:56,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:11:56,733 INFO L93 Difference]: Finished difference Result 836 states and 1480 transitions. [2022-07-19 11:11:56,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:11:56,736 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 2 states have internal predecessors, (180), 0 states have call successors, (0), 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 180 [2022-07-19 11:11:56,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:11:56,750 INFO L225 Difference]: With dead ends: 836 [2022-07-19 11:11:56,759 INFO L226 Difference]: Without dead ends: 457 [2022-07-19 11:11:56,763 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 [2022-07-19 11:11:56,771 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 103 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-19 11:11:56,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 150 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-19 11:11:56,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-07-19 11:11:56,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 451. [2022-07-19 11:11:56,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 1.5977777777777777) internal successors, (719), 450 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:56,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 719 transitions. [2022-07-19 11:11:56,832 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 719 transitions. Word has length 180 [2022-07-19 11:11:56,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:11:56,833 INFO L495 AbstractCegarLoop]: Abstraction has 451 states and 719 transitions. [2022-07-19 11:11:56,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 2 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:56,834 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 719 transitions. [2022-07-19 11:11:56,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-07-19 11:11:56,838 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:11:56,838 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-19 11:11:56,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 11:11:56,839 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:11:56,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:11:56,840 INFO L85 PathProgramCache]: Analyzing trace with hash -586354594, now seen corresponding path program 1 times [2022-07-19 11:11:56,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:11:56,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032316566] [2022-07-19 11:11:56,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:11:56,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:11:56,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:11:56,924 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:11:56,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:11:56,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032316566] [2022-07-19 11:11:56,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032316566] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:11:56,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:11:56,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 11:11:56,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114419093] [2022-07-19 11:11:56,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:11:56,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:11:56,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:11:56,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:11:56,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:11:56,931 INFO L87 Difference]: Start difference. First operand 451 states and 719 transitions. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 2 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:57,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:11:57,652 INFO L93 Difference]: Finished difference Result 1340 states and 2142 transitions. [2022-07-19 11:11:57,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:11:57,653 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 2 states have internal predecessors, (186), 0 states have call successors, (0), 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 186 [2022-07-19 11:11:57,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:11:57,658 INFO L225 Difference]: With dead ends: 1340 [2022-07-19 11:11:57,658 INFO L226 Difference]: Without dead ends: 891 [2022-07-19 11:11:57,660 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 [2022-07-19 11:11:57,661 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 285 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 11:11:57,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 141 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 11:11:57,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2022-07-19 11:11:57,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 886. [2022-07-19 11:11:57,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 1.5785310734463276) internal successors, (1397), 885 states have internal predecessors, (1397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:57,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1397 transitions. [2022-07-19 11:11:57,691 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1397 transitions. Word has length 186 [2022-07-19 11:11:57,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:11:57,692 INFO L495 AbstractCegarLoop]: Abstraction has 886 states and 1397 transitions. [2022-07-19 11:11:57,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 2 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:57,692 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1397 transitions. [2022-07-19 11:11:57,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-07-19 11:11:57,697 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:11:57,698 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:11:57,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 11:11:57,698 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:11:57,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:11:57,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1559504468, now seen corresponding path program 1 times [2022-07-19 11:11:57,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:11:57,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498371312] [2022-07-19 11:11:57,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:11:57,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:11:57,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:11:57,820 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:11:57,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:11:57,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498371312] [2022-07-19 11:11:57,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498371312] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:11:57,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:11:57,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 11:11:57,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040326536] [2022-07-19 11:11:57,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:11:57,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:11:57,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:11:57,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:11:57,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:11:57,825 INFO L87 Difference]: Start difference. First operand 886 states and 1397 transitions. Second operand has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 2 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:58,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:11:58,567 INFO L93 Difference]: Finished difference Result 2605 states and 4115 transitions. [2022-07-19 11:11:58,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:11:58,567 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 2 states have internal predecessors, (190), 0 states have call successors, (0), 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 190 [2022-07-19 11:11:58,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:11:58,574 INFO L225 Difference]: With dead ends: 2605 [2022-07-19 11:11:58,574 INFO L226 Difference]: Without dead ends: 1721 [2022-07-19 11:11:58,576 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 [2022-07-19 11:11:58,577 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 232 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 11:11:58,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 126 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 11:11:58,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2022-07-19 11:11:58,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 1719. [2022-07-19 11:11:58,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 1.5005820721769498) internal successors, (2578), 1718 states have internal predecessors, (2578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:58,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 2578 transitions. [2022-07-19 11:11:58,615 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 2578 transitions. Word has length 190 [2022-07-19 11:11:58,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:11:58,615 INFO L495 AbstractCegarLoop]: Abstraction has 1719 states and 2578 transitions. [2022-07-19 11:11:58,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 2 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:58,616 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 2578 transitions. [2022-07-19 11:11:58,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-07-19 11:11:58,620 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:11:58,620 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2022-07-19 11:11:58,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 11:11:58,621 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:11:58,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:11:58,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1196520631, now seen corresponding path program 1 times [2022-07-19 11:11:58,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:11:58,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206619985] [2022-07-19 11:11:58,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:11:58,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:11:58,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:11:58,688 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:11:58,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:11:58,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206619985] [2022-07-19 11:11:58,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206619985] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:11:58,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:11:58,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 11:11:58,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415432789] [2022-07-19 11:11:58,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:11:58,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:11:58,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:11:58,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:11:58,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:11:58,691 INFO L87 Difference]: Start difference. First operand 1719 states and 2578 transitions. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:59,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:11:59,442 INFO L93 Difference]: Finished difference Result 5080 states and 7623 transitions. [2022-07-19 11:11:59,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:11:59,443 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 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 193 [2022-07-19 11:11:59,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:11:59,455 INFO L225 Difference]: With dead ends: 5080 [2022-07-19 11:11:59,456 INFO L226 Difference]: Without dead ends: 3363 [2022-07-19 11:11:59,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:11:59,459 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 254 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 11:11:59,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 179 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 11:11:59,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3363 states. [2022-07-19 11:11:59,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3363 to 3361. [2022-07-19 11:11:59,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3361 states, 3360 states have (on average 1.4321428571428572) internal successors, (4812), 3360 states have internal predecessors, (4812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:59,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3361 states to 3361 states and 4812 transitions. [2022-07-19 11:11:59,529 INFO L78 Accepts]: Start accepts. Automaton has 3361 states and 4812 transitions. Word has length 193 [2022-07-19 11:11:59,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:11:59,530 INFO L495 AbstractCegarLoop]: Abstraction has 3361 states and 4812 transitions. [2022-07-19 11:11:59,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:59,530 INFO L276 IsEmpty]: Start isEmpty. Operand 3361 states and 4812 transitions. [2022-07-19 11:11:59,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-07-19 11:11:59,536 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:11:59,537 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:11:59,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 11:11:59,537 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:11:59,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:11:59,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1347155746, now seen corresponding path program 1 times [2022-07-19 11:11:59,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:11:59,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685964562] [2022-07-19 11:11:59,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:11:59,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:11:59,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:11:59,599 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:11:59,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:11:59,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685964562] [2022-07-19 11:11:59,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685964562] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:11:59,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:11:59,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 11:11:59,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269519892] [2022-07-19 11:11:59,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:11:59,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:11:59,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:11:59,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:11:59,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:11:59,602 INFO L87 Difference]: Start difference. First operand 3361 states and 4812 transitions. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 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) [2022-07-19 11:12:00,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:12:00,356 INFO L93 Difference]: Finished difference Result 9995 states and 14319 transitions. [2022-07-19 11:12:00,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:12:00,357 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 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 194 [2022-07-19 11:12:00,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:12:00,382 INFO L225 Difference]: With dead ends: 9995 [2022-07-19 11:12:00,382 INFO L226 Difference]: Without dead ends: 6636 [2022-07-19 11:12:00,388 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 [2022-07-19 11:12:00,390 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 242 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 11:12:00,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 173 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 11:12:00,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6636 states. [2022-07-19 11:12:00,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6636 to 6630. [2022-07-19 11:12:00,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6630 states, 6629 states have (on average 1.368381354653794) internal successors, (9071), 6629 states have internal predecessors, (9071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:00,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6630 states to 6630 states and 9071 transitions. [2022-07-19 11:12:00,523 INFO L78 Accepts]: Start accepts. Automaton has 6630 states and 9071 transitions. Word has length 194 [2022-07-19 11:12:00,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:12:00,524 INFO L495 AbstractCegarLoop]: Abstraction has 6630 states and 9071 transitions. [2022-07-19 11:12:00,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 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) [2022-07-19 11:12:00,525 INFO L276 IsEmpty]: Start isEmpty. Operand 6630 states and 9071 transitions. [2022-07-19 11:12:00,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-07-19 11:12:00,535 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:12:00,535 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:12:00,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 11:12:00,539 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:12:00,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:12:00,540 INFO L85 PathProgramCache]: Analyzing trace with hash -130752193, now seen corresponding path program 1 times [2022-07-19 11:12:00,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:12:00,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457853636] [2022-07-19 11:12:00,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:00,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:12:00,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:00,626 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:12:00,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:12:00,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457853636] [2022-07-19 11:12:00,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457853636] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:12:00,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:12:00,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 11:12:00,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946682211] [2022-07-19 11:12:00,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:12:00,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:12:00,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:12:00,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:12:00,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:12:00,629 INFO L87 Difference]: Start difference. First operand 6630 states and 9071 transitions. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:01,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:12:01,362 INFO L93 Difference]: Finished difference Result 17747 states and 24321 transitions. [2022-07-19 11:12:01,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:12:01,363 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 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 [2022-07-19 11:12:01,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:12:01,409 INFO L225 Difference]: With dead ends: 17747 [2022-07-19 11:12:01,409 INFO L226 Difference]: Without dead ends: 11119 [2022-07-19 11:12:01,420 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 [2022-07-19 11:12:01,424 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 208 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 11:12:01,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 171 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 11:12:01,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11119 states. [2022-07-19 11:12:01,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11119 to 11096. [2022-07-19 11:12:01,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11096 states, 11095 states have (on average 1.320865254619198) internal successors, (14655), 11095 states have internal predecessors, (14655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:01,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11096 states to 11096 states and 14655 transitions. [2022-07-19 11:12:01,702 INFO L78 Accepts]: Start accepts. Automaton has 11096 states and 14655 transitions. Word has length 199 [2022-07-19 11:12:01,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:12:01,702 INFO L495 AbstractCegarLoop]: Abstraction has 11096 states and 14655 transitions. [2022-07-19 11:12:01,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:01,703 INFO L276 IsEmpty]: Start isEmpty. Operand 11096 states and 14655 transitions. [2022-07-19 11:12:01,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-07-19 11:12:01,722 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:12:01,722 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 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] [2022-07-19 11:12:01,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 11:12:01,723 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:12:01,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:12:01,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1681277464, now seen corresponding path program 1 times [2022-07-19 11:12:01,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:12:01,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450311415] [2022-07-19 11:12:01,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:01,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:12:01,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:01,814 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 30 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:12:01,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:12:01,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450311415] [2022-07-19 11:12:01,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450311415] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 11:12:01,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552871783] [2022-07-19 11:12:01,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:01,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:12:01,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:12:01,819 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) [2022-07-19 11:12:01,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 11:12:01,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:01,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 11:12:02,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 11:12:02,085 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 11:12:02,086 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 11:12:02,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552871783] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:12:02,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 11:12:02,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-07-19 11:12:02,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596066444] [2022-07-19 11:12:02,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:12:02,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:12:02,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:12:02,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:12:02,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 11:12:02,095 INFO L87 Difference]: Start difference. First operand 11096 states and 14655 transitions. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:02,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:12:02,985 INFO L93 Difference]: Finished difference Result 29906 states and 39731 transitions. [2022-07-19 11:12:02,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:12:02,985 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 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 204 [2022-07-19 11:12:02,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:12:03,048 INFO L225 Difference]: With dead ends: 29906 [2022-07-19 11:12:03,049 INFO L226 Difference]: Without dead ends: 19015 [2022-07-19 11:12:03,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 11:12:03,069 INFO L413 NwaCegarLoop]: 385 mSDtfsCounter, 230 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 11:12:03,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 413 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 11:12:03,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19015 states. [2022-07-19 11:12:03,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19015 to 19011. [2022-07-19 11:12:03,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19011 states, 19010 states have (on average 1.2027880063124672) internal successors, (22865), 19010 states have internal predecessors, (22865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:03,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19011 states to 19011 states and 22865 transitions. [2022-07-19 11:12:03,469 INFO L78 Accepts]: Start accepts. Automaton has 19011 states and 22865 transitions. Word has length 204 [2022-07-19 11:12:03,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:12:03,469 INFO L495 AbstractCegarLoop]: Abstraction has 19011 states and 22865 transitions. [2022-07-19 11:12:03,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:03,470 INFO L276 IsEmpty]: Start isEmpty. Operand 19011 states and 22865 transitions. [2022-07-19 11:12:03,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-07-19 11:12:03,495 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:12:03,495 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1] [2022-07-19 11:12:03,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 11:12:03,719 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 [2022-07-19 11:12:03,720 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:12:03,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:12:03,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1944740812, now seen corresponding path program 1 times [2022-07-19 11:12:03,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:12:03,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059474693] [2022-07-19 11:12:03,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:03,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:12:03,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:03,816 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:12:03,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:12:03,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059474693] [2022-07-19 11:12:03,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059474693] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 11:12:03,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192159175] [2022-07-19 11:12:03,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:03,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:12:03,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:12:03,819 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) [2022-07-19 11:12:03,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 11:12:03,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:03,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 11:12:03,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 11:12:04,023 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 11:12:04,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 11:12:04,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192159175] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:12:04,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 11:12:04,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-07-19 11:12:04,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895615636] [2022-07-19 11:12:04,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:12:04,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:12:04,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:12:04,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:12:04,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 11:12:04,025 INFO L87 Difference]: Start difference. First operand 19011 states and 22865 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:04,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:12:04,974 INFO L93 Difference]: Finished difference Result 42894 states and 52535 transitions. [2022-07-19 11:12:04,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:12:04,975 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 206 [2022-07-19 11:12:04,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:12:05,025 INFO L225 Difference]: With dead ends: 42894 [2022-07-19 11:12:05,026 INFO L226 Difference]: Without dead ends: 24088 [2022-07-19 11:12:05,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 11:12:05,051 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 223 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-19 11:12:05,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 170 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-19 11:12:05,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24088 states. [2022-07-19 11:12:05,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24088 to 24084. [2022-07-19 11:12:05,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24084 states, 24083 states have (on average 1.1824523522816925) internal successors, (28477), 24083 states have internal predecessors, (28477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:05,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24084 states to 24084 states and 28477 transitions. [2022-07-19 11:12:05,495 INFO L78 Accepts]: Start accepts. Automaton has 24084 states and 28477 transitions. Word has length 206 [2022-07-19 11:12:05,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:12:05,495 INFO L495 AbstractCegarLoop]: Abstraction has 24084 states and 28477 transitions. [2022-07-19 11:12:05,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:05,496 INFO L276 IsEmpty]: Start isEmpty. Operand 24084 states and 28477 transitions. [2022-07-19 11:12:05,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-07-19 11:12:05,522 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:12:05,523 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:12:05,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 11:12:05,739 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 [2022-07-19 11:12:05,740 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:12:05,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:12:05,740 INFO L85 PathProgramCache]: Analyzing trace with hash 885807587, now seen corresponding path program 1 times [2022-07-19 11:12:05,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:12:05,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432090381] [2022-07-19 11:12:05,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:05,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:12:05,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:05,842 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 34 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:12:05,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:12:05,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432090381] [2022-07-19 11:12:05,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432090381] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 11:12:05,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918275727] [2022-07-19 11:12:05,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:05,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:12:05,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:12:05,845 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) [2022-07-19 11:12:05,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 11:12:06,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:06,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 11:12:06,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 11:12:06,421 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-19 11:12:06,422 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 11:12:06,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918275727] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:12:06,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 11:12:06,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-07-19 11:12:06,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40853091] [2022-07-19 11:12:06,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:12:06,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:12:06,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:12:06,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:12:06,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 11:12:06,427 INFO L87 Difference]: Start difference. First operand 24084 states and 28477 transitions. Second operand has 3 states, 3 states have (on average 61.0) internal successors, (183), 2 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:07,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:12:07,362 INFO L93 Difference]: Finished difference Result 58778 states and 70029 transitions. [2022-07-19 11:12:07,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:12:07,363 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 2 states have internal predecessors, (183), 0 states have call successors, (0), 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 [2022-07-19 11:12:07,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:12:07,423 INFO L225 Difference]: With dead ends: 58778 [2022-07-19 11:12:07,423 INFO L226 Difference]: Without dead ends: 35102 [2022-07-19 11:12:07,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 11:12:07,449 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 89 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 11:12:07,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 181 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 11:12:07,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35102 states. [2022-07-19 11:12:07,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35102 to 35086. [2022-07-19 11:12:07,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35086 states, 35085 states have (on average 1.1760866467151205) internal successors, (41263), 35085 states have internal predecessors, (41263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:07,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35086 states to 35086 states and 41263 transitions. [2022-07-19 11:12:07,962 INFO L78 Accepts]: Start accepts. Automaton has 35086 states and 41263 transitions. Word has length 215 [2022-07-19 11:12:07,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:12:07,963 INFO L495 AbstractCegarLoop]: Abstraction has 35086 states and 41263 transitions. [2022-07-19 11:12:07,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 2 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:07,963 INFO L276 IsEmpty]: Start isEmpty. Operand 35086 states and 41263 transitions. [2022-07-19 11:12:07,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2022-07-19 11:12:07,998 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:12:07,998 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:12:08,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 11:12:08,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:12:08,220 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:12:08,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:12:08,221 INFO L85 PathProgramCache]: Analyzing trace with hash 382365, now seen corresponding path program 1 times [2022-07-19 11:12:08,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:12:08,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050317890] [2022-07-19 11:12:08,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:08,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:12:08,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:08,310 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 53 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-19 11:12:08,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:12:08,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050317890] [2022-07-19 11:12:08,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050317890] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 11:12:08,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272950073] [2022-07-19 11:12:08,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:08,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:12:08,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:12:08,312 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) [2022-07-19 11:12:08,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 11:12:08,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:08,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 11:12:08,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 11:12:08,767 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-19 11:12:08,767 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 11:12:08,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272950073] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:12:08,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 11:12:08,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-19 11:12:08,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69003225] [2022-07-19 11:12:08,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:12:08,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:12:08,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:12:08,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:12:08,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 11:12:08,770 INFO L87 Difference]: Start difference. First operand 35086 states and 41263 transitions. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:09,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:12:09,642 INFO L93 Difference]: Finished difference Result 84436 states and 99671 transitions. [2022-07-19 11:12:09,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:12:09,642 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 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 228 [2022-07-19 11:12:09,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:12:09,835 INFO L225 Difference]: With dead ends: 84436 [2022-07-19 11:12:09,835 INFO L226 Difference]: Without dead ends: 49758 [2022-07-19 11:12:09,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 11:12:09,858 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 64 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 11:12:09,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 218 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 11:12:09,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49758 states. [2022-07-19 11:12:10,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49758 to 47075. [2022-07-19 11:12:10,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47075 states, 47074 states have (on average 1.1830947019586184) internal successors, (55693), 47074 states have internal predecessors, (55693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:10,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47075 states to 47075 states and 55693 transitions. [2022-07-19 11:12:10,506 INFO L78 Accepts]: Start accepts. Automaton has 47075 states and 55693 transitions. Word has length 228 [2022-07-19 11:12:10,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:12:10,506 INFO L495 AbstractCegarLoop]: Abstraction has 47075 states and 55693 transitions. [2022-07-19 11:12:10,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:10,507 INFO L276 IsEmpty]: Start isEmpty. Operand 47075 states and 55693 transitions. [2022-07-19 11:12:10,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2022-07-19 11:12:10,547 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:12:10,547 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:12:10,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 11:12:10,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:12:10,764 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:12:10,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:12:10,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1347151785, now seen corresponding path program 1 times [2022-07-19 11:12:10,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:12:10,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830870280] [2022-07-19 11:12:10,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:10,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:12:10,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:10,859 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-19 11:12:10,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:12:10,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830870280] [2022-07-19 11:12:10,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830870280] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 11:12:10,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53894028] [2022-07-19 11:12:10,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:10,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:12:10,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:12:10,862 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) [2022-07-19 11:12:10,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 11:12:11,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:11,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 11:12:11,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 11:12:11,037 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-19 11:12:11,037 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 11:12:11,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53894028] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:12:11,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 11:12:11,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-19 11:12:11,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826831527] [2022-07-19 11:12:11,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:12:11,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:12:11,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:12:11,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:12:11,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 11:12:11,040 INFO L87 Difference]: Start difference. First operand 47075 states and 55693 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) [2022-07-19 11:12:11,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:12:11,972 INFO L93 Difference]: Finished difference Result 93745 states and 110937 transitions. [2022-07-19 11:12:11,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:12:11,973 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 [2022-07-19 11:12:11,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:12:12,040 INFO L225 Difference]: With dead ends: 93745 [2022-07-19 11:12:12,040 INFO L226 Difference]: Without dead ends: 47078 [2022-07-19 11:12:12,080 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 [2022-07-19 11:12:12,080 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 262 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 11:12:12,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 342 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 11:12:12,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47078 states. [2022-07-19 11:12:12,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47078 to 45856. [2022-07-19 11:12:12,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45856 states, 45855 states have (on average 1.1619234543670265) internal successors, (53280), 45855 states have internal predecessors, (53280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:12,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45856 states to 45856 states and 53280 transitions. [2022-07-19 11:12:12,875 INFO L78 Accepts]: Start accepts. Automaton has 45856 states and 53280 transitions. Word has length 245 [2022-07-19 11:12:12,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:12:12,875 INFO L495 AbstractCegarLoop]: Abstraction has 45856 states and 53280 transitions. [2022-07-19 11:12:12,875 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) [2022-07-19 11:12:12,875 INFO L276 IsEmpty]: Start isEmpty. Operand 45856 states and 53280 transitions. [2022-07-19 11:12:12,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2022-07-19 11:12:12,912 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:12:12,912 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, 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] [2022-07-19 11:12:12,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 11:12:13,136 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,SelfDestructingSolverStorable10 [2022-07-19 11:12:13,136 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:12:13,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:12:13,137 INFO L85 PathProgramCache]: Analyzing trace with hash -974196740, now seen corresponding path program 1 times [2022-07-19 11:12:13,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:12:13,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309302219] [2022-07-19 11:12:13,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:13,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:12:13,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:13,243 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 71 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-19 11:12:13,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:12:13,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309302219] [2022-07-19 11:12:13,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309302219] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 11:12:13,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301562270] [2022-07-19 11:12:13,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:13,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:12:13,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:12:13,246 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) [2022-07-19 11:12:13,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 11:12:13,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:13,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 11:12:13,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 11:12:13,439 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 11:12:13,440 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 11:12:13,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301562270] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:12:13,440 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 11:12:13,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-19 11:12:13,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898041020] [2022-07-19 11:12:13,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:12:13,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:12:13,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:12:13,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:12:13,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 11:12:13,442 INFO L87 Difference]: Start difference. First operand 45856 states and 53280 transitions. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:14,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:12:14,378 INFO L93 Difference]: Finished difference Result 88239 states and 102175 transitions. [2022-07-19 11:12:14,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:12:14,379 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 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 246 [2022-07-19 11:12:14,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:12:14,432 INFO L225 Difference]: With dead ends: 88239 [2022-07-19 11:12:14,433 INFO L226 Difference]: Without dead ends: 42791 [2022-07-19 11:12:14,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 11:12:14,464 INFO L413 NwaCegarLoop]: 350 mSDtfsCounter, 248 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 11:12:14,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 376 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 11:12:14,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42791 states. [2022-07-19 11:12:14,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42791 to 39332. [2022-07-19 11:12:14,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39332 states, 39331 states have (on average 1.1241260074750197) internal successors, (44213), 39331 states have internal predecessors, (44213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:15,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39332 states to 39332 states and 44213 transitions. [2022-07-19 11:12:15,022 INFO L78 Accepts]: Start accepts. Automaton has 39332 states and 44213 transitions. Word has length 246 [2022-07-19 11:12:15,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:12:15,022 INFO L495 AbstractCegarLoop]: Abstraction has 39332 states and 44213 transitions. [2022-07-19 11:12:15,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:15,022 INFO L276 IsEmpty]: Start isEmpty. Operand 39332 states and 44213 transitions. [2022-07-19 11:12:15,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-07-19 11:12:15,051 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:12:15,051 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:12:15,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 11:12:15,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:12:15,252 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:12:15,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:12:15,253 INFO L85 PathProgramCache]: Analyzing trace with hash -35903996, now seen corresponding path program 1 times [2022-07-19 11:12:15,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:12:15,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898074528] [2022-07-19 11:12:15,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:15,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:12:15,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:15,364 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 91 proven. 12 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-19 11:12:15,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:12:15,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898074528] [2022-07-19 11:12:15,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898074528] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 11:12:15,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055432002] [2022-07-19 11:12:15,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:15,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:12:15,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:12:15,367 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) [2022-07-19 11:12:15,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 11:12:15,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:15,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 11:12:15,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 11:12:15,733 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-19 11:12:15,734 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 11:12:15,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055432002] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:12:15,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 11:12:15,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-07-19 11:12:15,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342893011] [2022-07-19 11:12:15,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:12:15,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:12:15,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:12:15,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:12:15,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-19 11:12:15,736 INFO L87 Difference]: Start difference. First operand 39332 states and 44213 transitions. Second operand has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:16,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:12:16,613 INFO L93 Difference]: Finished difference Result 78057 states and 87771 transitions. [2022-07-19 11:12:16,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:12:16,613 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 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 247 [2022-07-19 11:12:16,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:12:16,659 INFO L225 Difference]: With dead ends: 78057 [2022-07-19 11:12:16,659 INFO L226 Difference]: Without dead ends: 39336 [2022-07-19 11:12:16,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-19 11:12:16,693 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 96 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 11:12:16,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 101 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 11:12:16,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39336 states. [2022-07-19 11:12:17,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39336 to 39332. [2022-07-19 11:12:17,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39332 states, 39331 states have (on average 1.1220157127965218) internal successors, (44130), 39331 states have internal predecessors, (44130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:17,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39332 states to 39332 states and 44130 transitions. [2022-07-19 11:12:17,254 INFO L78 Accepts]: Start accepts. Automaton has 39332 states and 44130 transitions. Word has length 247 [2022-07-19 11:12:17,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:12:17,255 INFO L495 AbstractCegarLoop]: Abstraction has 39332 states and 44130 transitions. [2022-07-19 11:12:17,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:17,255 INFO L276 IsEmpty]: Start isEmpty. Operand 39332 states and 44130 transitions. [2022-07-19 11:12:17,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-07-19 11:12:17,282 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:12:17,282 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:12:17,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 11:12:17,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:12:17,483 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:12:17,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:12:17,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1901025622, now seen corresponding path program 1 times [2022-07-19 11:12:17,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:12:17,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791865094] [2022-07-19 11:12:17,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:17,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:12:17,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:17,576 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 110 proven. 6 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2022-07-19 11:12:17,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:12:17,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791865094] [2022-07-19 11:12:17,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791865094] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 11:12:17,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085727148] [2022-07-19 11:12:17,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:17,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:12:17,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:12:17,580 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) [2022-07-19 11:12:17,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 11:12:17,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:17,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 11:12:17,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 11:12:17,739 INFO L134 CoverageAnalysis]: Checked inductivity of 215 backedges. 153 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-07-19 11:12:17,740 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 11:12:17,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085727148] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:12:17,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 11:12:17,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-19 11:12:17,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824649725] [2022-07-19 11:12:17,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:12:17,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:12:17,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:12:17,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:12:17,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 11:12:17,742 INFO L87 Difference]: Start difference. First operand 39332 states and 44130 transitions. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:18,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:12:18,315 INFO L93 Difference]: Finished difference Result 113467 states and 127351 transitions. [2022-07-19 11:12:18,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:12:18,315 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 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 275 [2022-07-19 11:12:18,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:12:18,395 INFO L225 Difference]: With dead ends: 113467 [2022-07-19 11:12:18,395 INFO L226 Difference]: Without dead ends: 74746 [2022-07-19 11:12:18,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 11:12:18,422 INFO L413 NwaCegarLoop]: 595 mSDtfsCounter, 307 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 11:12:18,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 865 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 11:12:18,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74746 states. [2022-07-19 11:12:19,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74746 to 68041. [2022-07-19 11:12:19,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68041 states, 68040 states have (on average 1.112962962962963) internal successors, (75726), 68040 states have internal predecessors, (75726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:19,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68041 states to 68041 states and 75726 transitions. [2022-07-19 11:12:19,462 INFO L78 Accepts]: Start accepts. Automaton has 68041 states and 75726 transitions. Word has length 275 [2022-07-19 11:12:19,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:12:19,463 INFO L495 AbstractCegarLoop]: Abstraction has 68041 states and 75726 transitions. [2022-07-19 11:12:19,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:19,463 INFO L276 IsEmpty]: Start isEmpty. Operand 68041 states and 75726 transitions. [2022-07-19 11:12:19,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2022-07-19 11:12:19,509 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:12:19,510 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-19 11:12:19,527 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-19 11:12:19,710 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,SelfDestructingSolverStorable13 [2022-07-19 11:12:19,711 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:12:19,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:12:19,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1302108884, now seen corresponding path program 1 times [2022-07-19 11:12:19,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:12:19,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650179433] [2022-07-19 11:12:19,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:19,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:12:19,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:19,851 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 99 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-19 11:12:19,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:12:19,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650179433] [2022-07-19 11:12:19,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650179433] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 11:12:19,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938806249] [2022-07-19 11:12:19,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:19,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:12:19,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:12:19,854 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) [2022-07-19 11:12:19,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 11:12:19,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:19,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 11:12:20,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 11:12:20,270 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-19 11:12:20,271 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 11:12:20,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938806249] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:12:20,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 11:12:20,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-19 11:12:20,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955026453] [2022-07-19 11:12:20,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:12:20,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:12:20,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:12:20,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:12:20,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 11:12:20,272 INFO L87 Difference]: Start difference. First operand 68041 states and 75726 transitions. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:21,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:12:21,237 INFO L93 Difference]: Finished difference Result 134864 states and 150119 transitions. [2022-07-19 11:12:21,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:12:21,238 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 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 280 [2022-07-19 11:12:21,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:12:21,308 INFO L225 Difference]: With dead ends: 134864 [2022-07-19 11:12:21,308 INFO L226 Difference]: Without dead ends: 67434 [2022-07-19 11:12:21,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 11:12:21,346 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 105 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 11:12:21,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 372 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 11:12:21,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67434 states. [2022-07-19 11:12:22,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67434 to 64996. [2022-07-19 11:12:22,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64996 states, 64995 states have (on average 1.0931610123855682) internal successors, (71050), 64995 states have internal predecessors, (71050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:22,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64996 states to 64996 states and 71050 transitions. [2022-07-19 11:12:22,291 INFO L78 Accepts]: Start accepts. Automaton has 64996 states and 71050 transitions. Word has length 280 [2022-07-19 11:12:22,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:12:22,292 INFO L495 AbstractCegarLoop]: Abstraction has 64996 states and 71050 transitions. [2022-07-19 11:12:22,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:22,292 INFO L276 IsEmpty]: Start isEmpty. Operand 64996 states and 71050 transitions. [2022-07-19 11:12:22,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2022-07-19 11:12:22,355 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:12:22,355 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 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, 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] [2022-07-19 11:12:22,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-19 11:12:22,556 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,SelfDestructingSolverStorable14 [2022-07-19 11:12:22,556 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:12:22,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:12:22,557 INFO L85 PathProgramCache]: Analyzing trace with hash 677487726, now seen corresponding path program 1 times [2022-07-19 11:12:22,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:12:22,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082398074] [2022-07-19 11:12:22,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:22,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:12:22,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:22,651 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 124 proven. 6 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-07-19 11:12:22,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:12:22,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082398074] [2022-07-19 11:12:22,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082398074] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 11:12:22,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045983735] [2022-07-19 11:12:22,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:22,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:12:22,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:12:22,654 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) [2022-07-19 11:12:22,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 11:12:22,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:22,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 687 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 11:12:22,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 11:12:22,938 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 217 proven. 35 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-19 11:12:22,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 11:12:23,045 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 217 proven. 35 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-19 11:12:23,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045983735] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 11:12:23,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 11:12:23,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 6 [2022-07-19 11:12:23,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85688790] [2022-07-19 11:12:23,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 11:12:23,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 11:12:23,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:12:23,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 11:12:23,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 11:12:23,050 INFO L87 Difference]: Start difference. First operand 64996 states and 71050 transitions. Second operand has 6 states, 6 states have (on average 57.0) internal successors, (342), 6 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:26,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:12:26,946 INFO L93 Difference]: Finished difference Result 262013 states and 287924 transitions. [2022-07-19 11:12:26,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 11:12:26,947 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 57.0) internal successors, (342), 6 states have internal predecessors, (342), 0 states have call successors, (0), 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 315 [2022-07-19 11:12:26,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:12:27,215 INFO L225 Difference]: With dead ends: 262013 [2022-07-19 11:12:27,215 INFO L226 Difference]: Without dead ends: 197425 [2022-07-19 11:12:27,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 645 GetRequests, 634 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-07-19 11:12:27,276 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 2802 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 3959 mSolverCounterSat, 679 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2802 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 4638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 679 IncrementalHoareTripleChecker+Valid, 3959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-19 11:12:27,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2802 Valid, 441 Invalid, 4638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [679 Valid, 3959 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-07-19 11:12:27,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197425 states. [2022-07-19 11:12:29,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197425 to 194495. [2022-07-19 11:12:29,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194495 states, 194494 states have (on average 1.0928923257272718) internal successors, (212561), 194494 states have internal predecessors, (212561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:30,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194495 states to 194495 states and 212561 transitions. [2022-07-19 11:12:30,384 INFO L78 Accepts]: Start accepts. Automaton has 194495 states and 212561 transitions. Word has length 315 [2022-07-19 11:12:30,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:12:30,385 INFO L495 AbstractCegarLoop]: Abstraction has 194495 states and 212561 transitions. [2022-07-19 11:12:30,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 57.0) internal successors, (342), 6 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:30,385 INFO L276 IsEmpty]: Start isEmpty. Operand 194495 states and 212561 transitions. [2022-07-19 11:12:30,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2022-07-19 11:12:30,467 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:12:30,468 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:12:30,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-19 11:12:30,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-19 11:12:30,669 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:12:30,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:12:30,670 INFO L85 PathProgramCache]: Analyzing trace with hash 939208580, now seen corresponding path program 1 times [2022-07-19 11:12:30,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:12:30,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943685376] [2022-07-19 11:12:30,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:30,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:12:30,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:30,800 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 177 proven. 12 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-07-19 11:12:30,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:12:30,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943685376] [2022-07-19 11:12:30,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943685376] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 11:12:30,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145626964] [2022-07-19 11:12:30,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:30,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:12:30,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:12:30,803 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 11:12:30,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-19 11:12:30,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:30,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 11:12:30,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 11:12:31,165 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 165 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-19 11:12:31,166 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 11:12:31,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145626964] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:12:31,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 11:12:31,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-07-19 11:12:31,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908519249] [2022-07-19 11:12:31,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:12:31,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 11:12:31,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:12:31,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 11:12:31,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-19 11:12:31,169 INFO L87 Difference]: Start difference. First operand 194495 states and 212561 transitions. Second operand has 4 states, 4 states have (on average 65.5) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:33,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:12:33,354 INFO L93 Difference]: Finished difference Result 397537 states and 434235 transitions. [2022-07-19 11:12:33,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 11:12:33,355 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 65.5) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 330 [2022-07-19 11:12:33,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:12:33,731 INFO L225 Difference]: With dead ends: 397537 [2022-07-19 11:12:33,732 INFO L226 Difference]: Without dead ends: 203856 [2022-07-19 11:12:33,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-19 11:12:33,834 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 438 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 11:12:33,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 200 Invalid, 991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 11:12:34,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203856 states. [2022-07-19 11:12:36,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203856 to 196931. [2022-07-19 11:12:36,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196931 states, 196930 states have (on average 1.0883918143502767) internal successors, (214337), 196930 states have internal predecessors, (214337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:36,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196931 states to 196931 states and 214337 transitions. [2022-07-19 11:12:36,920 INFO L78 Accepts]: Start accepts. Automaton has 196931 states and 214337 transitions. Word has length 330 [2022-07-19 11:12:36,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:12:36,920 INFO L495 AbstractCegarLoop]: Abstraction has 196931 states and 214337 transitions. [2022-07-19 11:12:36,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.5) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:36,921 INFO L276 IsEmpty]: Start isEmpty. Operand 196931 states and 214337 transitions. [2022-07-19 11:12:37,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2022-07-19 11:12:37,014 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:12:37,014 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:12:37,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-19 11:12:37,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-19 11:12:37,216 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:12:37,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:12:37,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1410722384, now seen corresponding path program 1 times [2022-07-19 11:12:37,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:12:37,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731565777] [2022-07-19 11:12:37,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:37,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:12:37,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:37,346 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 176 proven. 11 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-07-19 11:12:37,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:12:37,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731565777] [2022-07-19 11:12:37,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731565777] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 11:12:37,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357539312] [2022-07-19 11:12:37,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:37,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:12:37,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:12:37,350 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 11:12:37,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-19 11:12:37,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:37,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 11:12:37,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 11:12:37,630 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-07-19 11:12:37,630 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 11:12:37,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357539312] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:12:37,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 11:12:37,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-19 11:12:37,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535405827] [2022-07-19 11:12:37,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:12:37,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 11:12:37,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:12:37,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 11:12:37,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-19 11:12:37,632 INFO L87 Difference]: Start difference. First operand 196931 states and 214337 transitions. Second operand has 4 states, 4 states have (on average 72.25) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:40,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:12:40,502 INFO L93 Difference]: Finished difference Result 448636 states and 489252 transitions. [2022-07-19 11:12:40,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 11:12:40,504 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 72.25) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 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 346 [2022-07-19 11:12:40,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:12:40,940 INFO L225 Difference]: With dead ends: 448636 [2022-07-19 11:12:40,940 INFO L226 Difference]: Without dead ends: 252113 [2022-07-19 11:12:41,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-19 11:12:41,057 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 350 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1260 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 1499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 1260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-19 11:12:41,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 154 Invalid, 1499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 1260 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-19 11:12:41,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252113 states. [2022-07-19 11:12:43,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252113 to 200964. [2022-07-19 11:12:44,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200964 states, 200963 states have (on average 1.0762727467245214) internal successors, (216291), 200963 states have internal predecessors, (216291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:44,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200964 states to 200964 states and 216291 transitions. [2022-07-19 11:12:44,776 INFO L78 Accepts]: Start accepts. Automaton has 200964 states and 216291 transitions. Word has length 346 [2022-07-19 11:12:44,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:12:44,777 INFO L495 AbstractCegarLoop]: Abstraction has 200964 states and 216291 transitions. [2022-07-19 11:12:44,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.25) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:44,777 INFO L276 IsEmpty]: Start isEmpty. Operand 200964 states and 216291 transitions. [2022-07-19 11:12:44,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2022-07-19 11:12:44,891 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:12:44,891 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:12:44,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-19 11:12:45,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-19 11:12:45,093 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:12:45,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:12:45,093 INFO L85 PathProgramCache]: Analyzing trace with hash -2120345378, now seen corresponding path program 1 times [2022-07-19 11:12:45,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:12:45,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886044272] [2022-07-19 11:12:45,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:45,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:12:45,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:45,191 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 120 proven. 6 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2022-07-19 11:12:45,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:12:45,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886044272] [2022-07-19 11:12:45,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886044272] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 11:12:45,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691069402] [2022-07-19 11:12:45,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:45,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:12:45,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:12:45,193 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 11:12:45,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-19 11:12:45,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:45,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 11:12:45,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 11:12:45,459 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2022-07-19 11:12:45,459 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 11:12:45,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691069402] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:12:45,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 11:12:45,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-19 11:12:45,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694025650] [2022-07-19 11:12:45,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:12:45,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 11:12:45,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:12:45,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 11:12:45,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-19 11:12:45,461 INFO L87 Difference]: Start difference. First operand 200964 states and 216291 transitions. Second operand has 4 states, 4 states have (on average 55.0) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:47,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:12:47,810 INFO L93 Difference]: Finished difference Result 575029 states and 618504 transitions. [2022-07-19 11:12:47,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 11:12:47,811 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 55.0) internal successors, (220), 3 states have internal predecessors, (220), 0 states have call successors, (0), 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 358 [2022-07-19 11:12:47,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:12:48,819 INFO L225 Difference]: With dead ends: 575029 [2022-07-19 11:12:48,819 INFO L226 Difference]: Without dead ends: 374676 [2022-07-19 11:12:48,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 356 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-19 11:12:48,932 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 540 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 11:12:48,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [540 Valid, 397 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 11:12:49,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374676 states.