./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem17_label12.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem17_label12.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 6527eed8ae625274c5a4f237cc1c724f312a2d824fa69cbfc4381a7c8bc46d7c --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 12:52:31,081 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 12:52:31,083 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 12:52:31,102 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 12:52:31,104 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 12:52:31,105 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 12:52:31,106 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 12:52:31,109 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 12:52:31,110 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 12:52:31,112 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 12:52:31,113 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 12:52:31,115 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 12:52:31,116 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 12:52:31,120 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 12:52:31,121 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 12:52:31,122 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 12:52:31,127 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 12:52:31,128 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 12:52:31,129 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 12:52:31,130 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 12:52:31,131 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 12:52:31,132 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 12:52:31,132 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 12:52:31,133 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 12:52:31,134 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 12:52:31,136 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 12:52:31,137 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 12:52:31,137 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 12:52:31,138 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 12:52:31,138 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 12:52:31,139 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 12:52:31,139 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 12:52:31,140 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 12:52:31,140 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 12:52:31,141 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 12:52:31,142 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 12:52:31,142 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 12:52:31,143 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 12:52:31,143 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 12:52:31,143 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 12:52:31,143 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 12:52:31,145 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 12:52:31,146 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 12:52:31,166 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 12:52:31,166 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 12:52:31,166 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 12:52:31,167 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 12:52:31,167 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 12:52:31,167 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 12:52:31,168 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 12:52:31,168 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 12:52:31,168 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 12:52:31,169 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 12:52:31,169 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 12:52:31,169 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 12:52:31,169 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 12:52:31,169 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 12:52:31,169 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 12:52:31,169 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 12:52:31,169 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 12:52:31,169 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 12:52:31,169 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 12:52:31,170 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 12:52:31,170 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 12:52:31,170 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 12:52:31,170 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 12:52:31,170 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 12:52:31,170 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 12:52:31,170 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 12:52:31,170 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 12:52:31,171 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 12:52:31,171 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 12:52:31,171 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 12:52:31,171 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 12:52:31,171 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 12:52:31,171 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 12:52:31,172 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6527eed8ae625274c5a4f237cc1c724f312a2d824fa69cbfc4381a7c8bc46d7c [2022-07-22 12:52:31,372 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 12:52:31,389 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 12:52:31,391 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 12:52:31,392 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 12:52:31,392 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 12:52:31,393 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label12.c [2022-07-22 12:52:31,435 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77cbcd1fc/9706d07f663d49068a0fc893d80ced77/FLAG651ec97ae [2022-07-22 12:52:31,981 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 12:52:31,981 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label12.c [2022-07-22 12:52:31,998 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77cbcd1fc/9706d07f663d49068a0fc893d80ced77/FLAG651ec97ae [2022-07-22 12:52:32,451 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77cbcd1fc/9706d07f663d49068a0fc893d80ced77 [2022-07-22 12:52:32,453 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 12:52:32,454 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 12:52:32,455 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 12:52:32,455 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 12:52:32,457 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 12:52:32,457 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 12:52:32" (1/1) ... [2022-07-22 12:52:32,458 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@bac0ddb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:52:32, skipping insertion in model container [2022-07-22 12:52:32,459 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 12:52:32" (1/1) ... [2022-07-22 12:52:32,463 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 12:52:32,541 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 12:52:32,712 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/Problem17_label12.c[5027,5040] [2022-07-22 12:52:33,047 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 12:52:33,053 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 12:52:33,074 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/Problem17_label12.c[5027,5040] [2022-07-22 12:52:33,255 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 12:52:33,267 INFO L208 MainTranslator]: Completed translation [2022-07-22 12:52:33,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:52:33 WrapperNode [2022-07-22 12:52:33,267 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 12:52:33,268 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 12:52:33,268 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 12:52:33,269 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 12:52:33,274 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:52:33" (1/1) ... [2022-07-22 12:52:33,307 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:52:33" (1/1) ... [2022-07-22 12:52:33,490 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2022-07-22 12:52:33,491 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 12:52:33,492 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 12:52:33,492 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 12:52:33,492 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 12:52:33,498 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:52:33" (1/1) ... [2022-07-22 12:52:33,498 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:52:33" (1/1) ... [2022-07-22 12:52:33,559 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:52:33" (1/1) ... [2022-07-22 12:52:33,560 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:52:33" (1/1) ... [2022-07-22 12:52:33,638 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:52:33" (1/1) ... [2022-07-22 12:52:33,657 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:52:33" (1/1) ... [2022-07-22 12:52:33,679 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:52:33" (1/1) ... [2022-07-22 12:52:33,726 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 12:52:33,727 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 12:52:33,728 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 12:52:33,728 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 12:52:33,729 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:52:33" (1/1) ... [2022-07-22 12:52:33,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 12:52:33,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:52:33,764 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 12:52:33,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 12:52:33,823 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 12:52:33,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 12:52:33,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 12:52:33,824 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 12:52:33,938 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 12:52:33,939 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 12:52:36,115 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 12:52:36,124 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 12:52:36,124 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-22 12:52:36,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 12:52:36 BoogieIcfgContainer [2022-07-22 12:52:36,126 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 12:52:36,127 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 12:52:36,128 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 12:52:36,130 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 12:52:36,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 12:52:32" (1/3) ... [2022-07-22 12:52:36,131 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d67162 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 12:52:36, skipping insertion in model container [2022-07-22 12:52:36,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:52:33" (2/3) ... [2022-07-22 12:52:36,131 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d67162 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 12:52:36, skipping insertion in model container [2022-07-22 12:52:36,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 12:52:36" (3/3) ... [2022-07-22 12:52:36,133 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label12.c [2022-07-22 12:52:36,142 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 12:52:36,143 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 12:52:36,188 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 12:52:36,192 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@65373aea, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@50306764 [2022-07-22 12:52:36,192 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 12:52:36,207 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:36,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-22 12:52:36,213 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:52:36,213 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] [2022-07-22 12:52:36,214 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:52:36,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:52:36,218 INFO L85 PathProgramCache]: Analyzing trace with hash 2113343065, now seen corresponding path program 1 times [2022-07-22 12:52:36,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:52:36,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675470149] [2022-07-22 12:52:36,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:52:36,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:52:36,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:52:36,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:52:36,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:52:36,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675470149] [2022-07-22 12:52:36,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675470149] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:52:36,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:52:36,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:52:36,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628705168] [2022-07-22 12:52:36,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:52:36,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:52:36,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:52:36,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:52:36,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:52:36,463 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 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 11.0) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:38,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:52:38,483 INFO L93 Difference]: Finished difference Result 1642 states and 3024 transitions. [2022-07-22 12:52:38,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:52:38,485 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 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 33 [2022-07-22 12:52:38,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:52:38,497 INFO L225 Difference]: With dead ends: 1642 [2022-07-22 12:52:38,497 INFO L226 Difference]: Without dead ends: 975 [2022-07-22 12:52:38,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:52:38,503 INFO L413 NwaCegarLoop]: 474 mSDtfsCounter, 457 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 1413 mSolverCounterSat, 372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 1785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 1413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-22 12:52:38,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [457 Valid, 550 Invalid, 1785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 1413 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-22 12:52:38,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2022-07-22 12:52:38,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 972. [2022-07-22 12:52:38,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 971 states have (on average 1.5077239958805355) internal successors, (1464), 971 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:38,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 1464 transitions. [2022-07-22 12:52:38,593 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 1464 transitions. Word has length 33 [2022-07-22 12:52:38,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:52:38,593 INFO L495 AbstractCegarLoop]: Abstraction has 972 states and 1464 transitions. [2022-07-22 12:52:38,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 2 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:38,594 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 1464 transitions. [2022-07-22 12:52:38,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-22 12:52:38,596 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:52:38,596 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:52:38,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 12:52:38,596 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:52:38,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:52:38,597 INFO L85 PathProgramCache]: Analyzing trace with hash 435284012, now seen corresponding path program 1 times [2022-07-22 12:52:38,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:52:38,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721234075] [2022-07-22 12:52:38,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:52:38,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:52:38,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:52:38,745 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:52:38,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:52:38,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721234075] [2022-07-22 12:52:38,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721234075] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:52:38,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:52:38,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:52:38,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816775254] [2022-07-22 12:52:38,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:52:38,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:52:38,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:52:38,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:52:38,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:52:38,751 INFO L87 Difference]: Start difference. First operand 972 states and 1464 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:40,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:52:40,574 INFO L93 Difference]: Finished difference Result 2814 states and 4242 transitions. [2022-07-22 12:52:40,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:52:40,574 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 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 103 [2022-07-22 12:52:40,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:52:40,580 INFO L225 Difference]: With dead ends: 2814 [2022-07-22 12:52:40,581 INFO L226 Difference]: Without dead ends: 1844 [2022-07-22 12:52:40,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:52:40,583 INFO L413 NwaCegarLoop]: 853 mSDtfsCounter, 458 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1283 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 1697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 1283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-22 12:52:40,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 921 Invalid, 1697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [414 Valid, 1283 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-22 12:52:40,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2022-07-22 12:52:40,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1842. [2022-07-22 12:52:40,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1842 states, 1841 states have (on average 1.3601303639326452) internal successors, (2504), 1841 states have internal predecessors, (2504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:40,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1842 states to 1842 states and 2504 transitions. [2022-07-22 12:52:40,633 INFO L78 Accepts]: Start accepts. Automaton has 1842 states and 2504 transitions. Word has length 103 [2022-07-22 12:52:40,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:52:40,635 INFO L495 AbstractCegarLoop]: Abstraction has 1842 states and 2504 transitions. [2022-07-22 12:52:40,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:40,636 INFO L276 IsEmpty]: Start isEmpty. Operand 1842 states and 2504 transitions. [2022-07-22 12:52:40,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-07-22 12:52:40,644 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:52:40,644 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:52:40,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 12:52:40,645 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:52:40,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:52:40,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1392867689, now seen corresponding path program 1 times [2022-07-22 12:52:40,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:52:40,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421772893] [2022-07-22 12:52:40,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:52:40,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:52:40,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:52:40,764 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:52:40,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:52:40,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421772893] [2022-07-22 12:52:40,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421772893] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:52:40,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:52:40,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:52:40,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367593355] [2022-07-22 12:52:40,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:52:40,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:52:40,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:52:40,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:52:40,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:52:40,767 INFO L87 Difference]: Start difference. First operand 1842 states and 2504 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 2 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:42,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:52:42,353 INFO L93 Difference]: Finished difference Result 5395 states and 7326 transitions. [2022-07-22 12:52:42,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:52:42,354 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 2 states have internal predecessors, (125), 0 states have call successors, (0), 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 125 [2022-07-22 12:52:42,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:52:42,361 INFO L225 Difference]: With dead ends: 5395 [2022-07-22 12:52:42,361 INFO L226 Difference]: Without dead ends: 2701 [2022-07-22 12:52:42,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:52:42,365 INFO L413 NwaCegarLoop]: 516 mSDtfsCounter, 368 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-22 12:52:42,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-22 12:52:42,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2701 states. [2022-07-22 12:52:42,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2701 to 2701. [2022-07-22 12:52:42,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2701 states, 2700 states have (on average 1.191851851851852) internal successors, (3218), 2700 states have internal predecessors, (3218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:42,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2701 states to 2701 states and 3218 transitions. [2022-07-22 12:52:42,402 INFO L78 Accepts]: Start accepts. Automaton has 2701 states and 3218 transitions. Word has length 125 [2022-07-22 12:52:42,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:52:42,403 INFO L495 AbstractCegarLoop]: Abstraction has 2701 states and 3218 transitions. [2022-07-22 12:52:42,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 2 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:42,404 INFO L276 IsEmpty]: Start isEmpty. Operand 2701 states and 3218 transitions. [2022-07-22 12:52:42,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-07-22 12:52:42,406 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:52:42,406 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:52:42,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 12:52:42,407 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:52:42,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:52:42,407 INFO L85 PathProgramCache]: Analyzing trace with hash -165152522, now seen corresponding path program 1 times [2022-07-22 12:52:42,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:52:42,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321629835] [2022-07-22 12:52:42,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:52:42,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:52:42,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:52:42,565 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 129 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:52:42,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:52:42,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321629835] [2022-07-22 12:52:42,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321629835] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:52:42,566 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:52:42,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:52:42,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971658131] [2022-07-22 12:52:42,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:52:42,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:52:42,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:52:42,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:52:42,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:52:42,568 INFO L87 Difference]: Start difference. First operand 2701 states and 3218 transitions. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:43,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:52:43,933 INFO L93 Difference]: Finished difference Result 7108 states and 8598 transitions. [2022-07-22 12:52:43,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:52:43,933 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 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 185 [2022-07-22 12:52:43,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:52:43,945 INFO L225 Difference]: With dead ends: 7108 [2022-07-22 12:52:43,945 INFO L226 Difference]: Without dead ends: 4409 [2022-07-22 12:52:43,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:52:43,949 INFO L413 NwaCegarLoop]: 726 mSDtfsCounter, 496 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-22 12:52:43,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 784 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-22 12:52:43,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4409 states. [2022-07-22 12:52:43,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4409 to 4409. [2022-07-22 12:52:43,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4409 states, 4408 states have (on average 1.1705989110707804) internal successors, (5160), 4408 states have internal predecessors, (5160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:44,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4409 states to 4409 states and 5160 transitions. [2022-07-22 12:52:44,005 INFO L78 Accepts]: Start accepts. Automaton has 4409 states and 5160 transitions. Word has length 185 [2022-07-22 12:52:44,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:52:44,005 INFO L495 AbstractCegarLoop]: Abstraction has 4409 states and 5160 transitions. [2022-07-22 12:52:44,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:44,006 INFO L276 IsEmpty]: Start isEmpty. Operand 4409 states and 5160 transitions. [2022-07-22 12:52:44,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-07-22 12:52:44,007 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:52:44,007 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-22 12:52:44,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 12:52:44,008 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:52:44,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:52:44,008 INFO L85 PathProgramCache]: Analyzing trace with hash -271732261, now seen corresponding path program 1 times [2022-07-22 12:52:44,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:52:44,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498843616] [2022-07-22 12:52:44,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:52:44,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:52:44,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:52:44,110 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-07-22 12:52:44,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:52:44,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498843616] [2022-07-22 12:52:44,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498843616] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:52:44,110 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:52:44,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:52:44,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419902294] [2022-07-22 12:52:44,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:52:44,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:52:44,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:52:44,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:52:44,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:52:44,113 INFO L87 Difference]: Start difference. First operand 4409 states and 5160 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:45,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:52:45,586 INFO L93 Difference]: Finished difference Result 10936 states and 12970 transitions. [2022-07-22 12:52:45,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:52:45,586 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 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 187 [2022-07-22 12:52:45,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:52:45,602 INFO L225 Difference]: With dead ends: 10936 [2022-07-22 12:52:45,602 INFO L226 Difference]: Without dead ends: 6528 [2022-07-22 12:52:45,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:52:45,608 INFO L413 NwaCegarLoop]: 382 mSDtfsCounter, 418 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-22 12:52:45,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [418 Valid, 444 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-22 12:52:45,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6528 states. [2022-07-22 12:52:45,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6528 to 4382. [2022-07-22 12:52:45,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4382 states, 4381 states have (on average 1.1684546907098836) internal successors, (5119), 4381 states have internal predecessors, (5119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:45,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4382 states to 4382 states and 5119 transitions. [2022-07-22 12:52:45,670 INFO L78 Accepts]: Start accepts. Automaton has 4382 states and 5119 transitions. Word has length 187 [2022-07-22 12:52:45,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:52:45,671 INFO L495 AbstractCegarLoop]: Abstraction has 4382 states and 5119 transitions. [2022-07-22 12:52:45,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:45,673 INFO L276 IsEmpty]: Start isEmpty. Operand 4382 states and 5119 transitions. [2022-07-22 12:52:45,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-07-22 12:52:45,675 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:52:45,675 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-22 12:52:45,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 12:52:45,676 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:52:45,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:52:45,676 INFO L85 PathProgramCache]: Analyzing trace with hash -386675243, now seen corresponding path program 1 times [2022-07-22 12:52:45,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:52:45,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878811306] [2022-07-22 12:52:45,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:52:45,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:52:45,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:52:45,793 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-22 12:52:45,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:52:45,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878811306] [2022-07-22 12:52:45,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878811306] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:52:45,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:52:45,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:52:45,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796755610] [2022-07-22 12:52:45,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:52:45,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:52:45,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:52:45,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:52:45,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:52:45,796 INFO L87 Difference]: Start difference. First operand 4382 states and 5119 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:47,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:52:47,415 INFO L93 Difference]: Finished difference Result 10045 states and 11706 transitions. [2022-07-22 12:52:47,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:52:47,416 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 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 253 [2022-07-22 12:52:47,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:52:47,427 INFO L225 Difference]: With dead ends: 10045 [2022-07-22 12:52:47,428 INFO L226 Difference]: Without dead ends: 5665 [2022-07-22 12:52:47,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:52:47,432 INFO L413 NwaCegarLoop]: 833 mSDtfsCounter, 403 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 1342 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 1409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-22 12:52:47,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [403 Valid, 894 Invalid, 1409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1342 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-22 12:52:47,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5665 states. [2022-07-22 12:52:47,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5665 to 5234. [2022-07-22 12:52:47,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5234 states, 5233 states have (on average 1.1587999235620103) internal successors, (6064), 5233 states have internal predecessors, (6064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:47,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5234 states to 5234 states and 6064 transitions. [2022-07-22 12:52:47,488 INFO L78 Accepts]: Start accepts. Automaton has 5234 states and 6064 transitions. Word has length 253 [2022-07-22 12:52:47,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:52:47,488 INFO L495 AbstractCegarLoop]: Abstraction has 5234 states and 6064 transitions. [2022-07-22 12:52:47,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:47,489 INFO L276 IsEmpty]: Start isEmpty. Operand 5234 states and 6064 transitions. [2022-07-22 12:52:47,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2022-07-22 12:52:47,491 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:52:47,491 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:52:47,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 12:52:47,491 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:52:47,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:52:47,492 INFO L85 PathProgramCache]: Analyzing trace with hash -2040583175, now seen corresponding path program 1 times [2022-07-22 12:52:47,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:52:47,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824089701] [2022-07-22 12:52:47,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:52:47,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:52:47,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:52:47,594 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 225 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-07-22 12:52:47,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:52:47,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824089701] [2022-07-22 12:52:47,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824089701] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:52:47,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:52:47,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:52:47,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131908351] [2022-07-22 12:52:47,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:52:47,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:52:47,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:52:47,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:52:47,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:52:47,597 INFO L87 Difference]: Start difference. First operand 5234 states and 6064 transitions. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:49,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:52:49,324 INFO L93 Difference]: Finished difference Result 13049 states and 15222 transitions. [2022-07-22 12:52:49,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:52:49,324 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 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 265 [2022-07-22 12:52:49,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:52:49,338 INFO L225 Difference]: With dead ends: 13049 [2022-07-22 12:52:49,338 INFO L226 Difference]: Without dead ends: 6942 [2022-07-22 12:52:49,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:52:49,343 INFO L413 NwaCegarLoop]: 586 mSDtfsCounter, 493 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 1588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-22 12:52:49,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 630 Invalid, 1588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 1238 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-22 12:52:49,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6942 states. [2022-07-22 12:52:49,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6942 to 6512. [2022-07-22 12:52:49,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6512 states, 6511 states have (on average 1.1520503762862848) internal successors, (7501), 6511 states have internal predecessors, (7501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:49,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6512 states to 6512 states and 7501 transitions. [2022-07-22 12:52:49,404 INFO L78 Accepts]: Start accepts. Automaton has 6512 states and 7501 transitions. Word has length 265 [2022-07-22 12:52:49,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:52:49,404 INFO L495 AbstractCegarLoop]: Abstraction has 6512 states and 7501 transitions. [2022-07-22 12:52:49,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:49,405 INFO L276 IsEmpty]: Start isEmpty. Operand 6512 states and 7501 transitions. [2022-07-22 12:52:49,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2022-07-22 12:52:49,408 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:52:49,408 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:52:49,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 12:52:49,408 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:52:49,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:52:49,409 INFO L85 PathProgramCache]: Analyzing trace with hash -455120796, now seen corresponding path program 1 times [2022-07-22 12:52:49,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:52:49,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737939885] [2022-07-22 12:52:49,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:52:49,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:52:49,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:52:49,505 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 225 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-22 12:52:49,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:52:49,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737939885] [2022-07-22 12:52:49,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737939885] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:52:49,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:52:49,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:52:49,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287542194] [2022-07-22 12:52:49,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:52:49,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:52:49,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:52:49,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:52:49,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:52:49,507 INFO L87 Difference]: Start difference. First operand 6512 states and 7501 transitions. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:50,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:52:50,920 INFO L93 Difference]: Finished difference Result 16010 states and 18477 transitions. [2022-07-22 12:52:50,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:52:50,921 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 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 288 [2022-07-22 12:52:50,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:52:50,936 INFO L225 Difference]: With dead ends: 16010 [2022-07-22 12:52:50,937 INFO L226 Difference]: Without dead ends: 9500 [2022-07-22 12:52:50,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:52:50,942 INFO L413 NwaCegarLoop]: 293 mSDtfsCounter, 416 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1221 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 1413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 1221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-22 12:52:50,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [416 Valid, 337 Invalid, 1413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 1221 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-22 12:52:50,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9500 states. [2022-07-22 12:52:51,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9500 to 8644. [2022-07-22 12:52:51,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8644 states, 8643 states have (on average 1.1545759574221914) internal successors, (9979), 8643 states have internal predecessors, (9979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:51,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8644 states to 8644 states and 9979 transitions. [2022-07-22 12:52:51,059 INFO L78 Accepts]: Start accepts. Automaton has 8644 states and 9979 transitions. Word has length 288 [2022-07-22 12:52:51,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:52:51,059 INFO L495 AbstractCegarLoop]: Abstraction has 8644 states and 9979 transitions. [2022-07-22 12:52:51,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:51,060 INFO L276 IsEmpty]: Start isEmpty. Operand 8644 states and 9979 transitions. [2022-07-22 12:52:51,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2022-07-22 12:52:51,063 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:52:51,063 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:52:51,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 12:52:51,064 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:52:51,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:52:51,065 INFO L85 PathProgramCache]: Analyzing trace with hash 777395375, now seen corresponding path program 1 times [2022-07-22 12:52:51,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:52:51,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793526666] [2022-07-22 12:52:51,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:52:51,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:52:51,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:52:51,170 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 235 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-22 12:52:51,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:52:51,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793526666] [2022-07-22 12:52:51,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793526666] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:52:51,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:52:51,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 12:52:51,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834132453] [2022-07-22 12:52:51,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:52:51,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:52:51,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:52:51,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:52:51,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:52:51,173 INFO L87 Difference]: Start difference. First operand 8644 states and 9979 transitions. Second operand has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:53,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:52:53,727 INFO L93 Difference]: Finished difference Result 30559 states and 35506 transitions. [2022-07-22 12:52:53,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:52:53,728 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 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 293 [2022-07-22 12:52:53,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:52:53,754 INFO L225 Difference]: With dead ends: 30559 [2022-07-22 12:52:53,754 INFO L226 Difference]: Without dead ends: 21062 [2022-07-22 12:52:53,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:52:53,760 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 890 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 2493 mSolverCounterSat, 458 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 890 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 2951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 458 IncrementalHoareTripleChecker+Valid, 2493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-22 12:52:53,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [890 Valid, 241 Invalid, 2951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [458 Valid, 2493 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-22 12:52:53,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21062 states. [2022-07-22 12:52:53,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21062 to 21022. [2022-07-22 12:52:53,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21022 states, 21021 states have (on average 1.142286285143428) internal successors, (24012), 21021 states have internal predecessors, (24012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:53,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21022 states to 21022 states and 24012 transitions. [2022-07-22 12:52:53,949 INFO L78 Accepts]: Start accepts. Automaton has 21022 states and 24012 transitions. Word has length 293 [2022-07-22 12:52:53,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:52:53,952 INFO L495 AbstractCegarLoop]: Abstraction has 21022 states and 24012 transitions. [2022-07-22 12:52:53,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:52:53,953 INFO L276 IsEmpty]: Start isEmpty. Operand 21022 states and 24012 transitions. [2022-07-22 12:52:53,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2022-07-22 12:52:53,957 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:52:53,957 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:52:53,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 12:52:53,957 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:52:53,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:52:53,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1748178961, now seen corresponding path program 1 times [2022-07-22 12:52:53,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:52:53,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784049730] [2022-07-22 12:52:53,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:52:53,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:52:54,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:52:54,097 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 256 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:52:54,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:52:54,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784049730] [2022-07-22 12:52:54,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784049730] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:52:54,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806405408] [2022-07-22 12:52:54,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:52:54,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:52:54,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:52:54,100 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 12:52:54,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 12:52:54,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:52:54,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-22 12:52:54,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:52:54,724 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 248 proven. 82 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-22 12:52:54,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 12:52:55,411 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 248 proven. 82 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-22 12:52:55,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806405408] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 12:52:55,412 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 12:52:55,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 9 [2022-07-22 12:52:55,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943999196] [2022-07-22 12:52:55,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 12:52:55,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 12:52:55,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:52:55,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 12:52:55,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-22 12:52:55,414 INFO L87 Difference]: Start difference. First operand 21022 states and 24012 transitions. Second operand has 9 states, 9 states have (on average 90.44444444444444) internal successors, (814), 9 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:07,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:53:07,992 INFO L93 Difference]: Finished difference Result 92412 states and 105636 transitions. [2022-07-22 12:53:07,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-22 12:53:07,993 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 90.44444444444444) internal successors, (814), 9 states have internal predecessors, (814), 0 states have call successors, (0), 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 328 [2022-07-22 12:53:07,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:53:08,095 INFO L225 Difference]: With dead ends: 92412 [2022-07-22 12:53:08,095 INFO L226 Difference]: Without dead ends: 67985 [2022-07-22 12:53:08,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 683 GetRequests, 664 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2022-07-22 12:53:08,115 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 7049 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 12945 mSolverCounterSat, 2773 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7049 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 15718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2773 IncrementalHoareTripleChecker+Valid, 12945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.9s IncrementalHoareTripleChecker+Time [2022-07-22 12:53:08,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7049 Valid, 510 Invalid, 15718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2773 Valid, 12945 Invalid, 0 Unknown, 0 Unchecked, 11.9s Time] [2022-07-22 12:53:08,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67985 states. [2022-07-22 12:53:08,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67985 to 53386. [2022-07-22 12:53:08,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53386 states, 53385 states have (on average 1.1439355624239018) internal successors, (61069), 53385 states have internal predecessors, (61069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:08,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53386 states to 53386 states and 61069 transitions. [2022-07-22 12:53:08,830 INFO L78 Accepts]: Start accepts. Automaton has 53386 states and 61069 transitions. Word has length 328 [2022-07-22 12:53:08,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:53:08,830 INFO L495 AbstractCegarLoop]: Abstraction has 53386 states and 61069 transitions. [2022-07-22 12:53:08,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 90.44444444444444) internal successors, (814), 9 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:08,831 INFO L276 IsEmpty]: Start isEmpty. Operand 53386 states and 61069 transitions. [2022-07-22 12:53:08,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 397 [2022-07-22 12:53:08,839 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:53:08,840 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-22 12:53:08,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 12:53:09,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-22 12:53:09,056 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:53:09,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:53:09,056 INFO L85 PathProgramCache]: Analyzing trace with hash -147091403, now seen corresponding path program 1 times [2022-07-22 12:53:09,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:53:09,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052906323] [2022-07-22 12:53:09,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:53:09,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:53:09,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:53:09,162 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 456 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-07-22 12:53:09,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:53:09,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052906323] [2022-07-22 12:53:09,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052906323] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:53:09,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:53:09,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:53:09,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491254657] [2022-07-22 12:53:09,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:53:09,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:53:09,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:53:09,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:53:09,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:53:09,165 INFO L87 Difference]: Start difference. First operand 53386 states and 61069 transitions. Second operand has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:10,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:53:10,892 INFO L93 Difference]: Finished difference Result 119091 states and 136469 transitions. [2022-07-22 12:53:10,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:53:10,892 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 396 [2022-07-22 12:53:10,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:53:10,990 INFO L225 Difference]: With dead ends: 119091 [2022-07-22 12:53:10,990 INFO L226 Difference]: Without dead ends: 65707 [2022-07-22 12:53:11,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:53:11,021 INFO L413 NwaCegarLoop]: 724 mSDtfsCounter, 319 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 1147 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 1362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 1147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-22 12:53:11,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [319 Valid, 787 Invalid, 1362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 1147 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-22 12:53:11,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65707 states. [2022-07-22 12:53:11,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65707 to 63582. [2022-07-22 12:53:11,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63582 states, 63581 states have (on average 1.114483886695711) internal successors, (70860), 63581 states have internal predecessors, (70860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:11,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63582 states to 63582 states and 70860 transitions. [2022-07-22 12:53:11,815 INFO L78 Accepts]: Start accepts. Automaton has 63582 states and 70860 transitions. Word has length 396 [2022-07-22 12:53:11,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:53:11,816 INFO L495 AbstractCegarLoop]: Abstraction has 63582 states and 70860 transitions. [2022-07-22 12:53:11,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:11,816 INFO L276 IsEmpty]: Start isEmpty. Operand 63582 states and 70860 transitions. [2022-07-22 12:53:11,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2022-07-22 12:53:11,823 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:53:11,824 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2022-07-22 12:53:11,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 12:53:11,824 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:53:11,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:53:11,824 INFO L85 PathProgramCache]: Analyzing trace with hash 749905159, now seen corresponding path program 1 times [2022-07-22 12:53:11,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:53:11,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848390852] [2022-07-22 12:53:11,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:53:11,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:53:12,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:53:12,142 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 526 proven. 80 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-22 12:53:12,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:53:12,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848390852] [2022-07-22 12:53:12,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848390852] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:53:12,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113555660] [2022-07-22 12:53:12,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:53:12,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:53:12,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:53:12,145 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 12:53:12,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 12:53:12,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:53:12,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 12:53:12,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:53:12,647 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 606 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-22 12:53:12,648 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 12:53:12,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113555660] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:53:12,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 12:53:12,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-07-22 12:53:12,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321057968] [2022-07-22 12:53:12,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:53:12,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:53:12,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:53:12,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:53:12,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-07-22 12:53:12,650 INFO L87 Difference]: Start difference. First operand 63582 states and 70860 transitions. Second operand has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:14,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:53:14,730 INFO L93 Difference]: Finished difference Result 127162 states and 141718 transitions. [2022-07-22 12:53:14,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:53:14,731 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 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 410 [2022-07-22 12:53:14,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:53:14,798 INFO L225 Difference]: With dead ends: 127162 [2022-07-22 12:53:14,799 INFO L226 Difference]: Without dead ends: 63582 [2022-07-22 12:53:14,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 409 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-07-22 12:53:14,833 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 825 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 2068 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 825 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 2378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 2068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-22 12:53:14,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [825 Valid, 314 Invalid, 2378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 2068 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-22 12:53:14,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63582 states. [2022-07-22 12:53:15,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63582 to 63157. [2022-07-22 12:53:15,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63157 states, 63156 states have (on average 1.114161758186079) internal successors, (70366), 63156 states have internal predecessors, (70366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:15,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63157 states to 63157 states and 70366 transitions. [2022-07-22 12:53:15,620 INFO L78 Accepts]: Start accepts. Automaton has 63157 states and 70366 transitions. Word has length 410 [2022-07-22 12:53:15,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:53:15,621 INFO L495 AbstractCegarLoop]: Abstraction has 63157 states and 70366 transitions. [2022-07-22 12:53:15,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 95.0) internal successors, (380), 4 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:15,621 INFO L276 IsEmpty]: Start isEmpty. Operand 63157 states and 70366 transitions. [2022-07-22 12:53:15,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2022-07-22 12:53:15,628 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:53:15,628 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:53:15,646 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-22 12:53:15,832 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,SelfDestructingSolverStorable11 [2022-07-22 12:53:15,832 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:53:15,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:53:15,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1597446720, now seen corresponding path program 1 times [2022-07-22 12:53:15,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:53:15,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735573342] [2022-07-22 12:53:15,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:53:15,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:53:15,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:53:16,000 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 360 proven. 181 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-07-22 12:53:16,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:53:16,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735573342] [2022-07-22 12:53:16,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735573342] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:53:16,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101868526] [2022-07-22 12:53:16,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:53:16,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:53:16,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:53:16,002 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 12:53:16,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 12:53:16,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:53:16,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 12:53:16,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:53:16,542 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 542 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-07-22 12:53:16,542 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 12:53:16,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101868526] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:53:16,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 12:53:16,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-07-22 12:53:16,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175118606] [2022-07-22 12:53:16,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:53:16,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:53:16,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:53:16,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:53:16,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-22 12:53:16,543 INFO L87 Difference]: Start difference. First operand 63157 states and 70366 transitions. Second operand has 4 states, 4 states have (on average 96.5) internal successors, (386), 4 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:19,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:53:19,388 INFO L93 Difference]: Finished difference Result 163781 states and 182720 transitions. [2022-07-22 12:53:19,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:53:19,389 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 96.5) internal successors, (386), 4 states have internal predecessors, (386), 0 states have call successors, (0), 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 458 [2022-07-22 12:53:19,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:53:19,520 INFO L225 Difference]: With dead ends: 163781 [2022-07-22 12:53:19,521 INFO L226 Difference]: Without dead ends: 100626 [2022-07-22 12:53:19,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 457 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-22 12:53:19,567 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 762 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 2345 mSolverCounterSat, 519 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 762 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 2864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 519 IncrementalHoareTripleChecker+Valid, 2345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-22 12:53:19,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [762 Valid, 180 Invalid, 2864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [519 Valid, 2345 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-22 12:53:19,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100626 states. [2022-07-22 12:53:20,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100626 to 98494. [2022-07-22 12:53:20,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98494 states, 98493 states have (on average 1.1112058724985532) internal successors, (109446), 98493 states have internal predecessors, (109446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:20,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98494 states to 98494 states and 109446 transitions. [2022-07-22 12:53:20,955 INFO L78 Accepts]: Start accepts. Automaton has 98494 states and 109446 transitions. Word has length 458 [2022-07-22 12:53:20,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:53:20,956 INFO L495 AbstractCegarLoop]: Abstraction has 98494 states and 109446 transitions. [2022-07-22 12:53:20,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 96.5) internal successors, (386), 4 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:20,956 INFO L276 IsEmpty]: Start isEmpty. Operand 98494 states and 109446 transitions. [2022-07-22 12:53:20,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2022-07-22 12:53:20,968 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:53:20,968 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-22 12:53:20,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 12:53:21,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:53:21,174 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:53:21,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:53:21,187 INFO L85 PathProgramCache]: Analyzing trace with hash 487505026, now seen corresponding path program 1 times [2022-07-22 12:53:21,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:53:21,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543403388] [2022-07-22 12:53:21,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:53:21,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:53:21,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:53:21,353 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2022-07-22 12:53:21,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:53:21,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543403388] [2022-07-22 12:53:21,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543403388] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:53:21,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:53:21,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:53:21,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177567874] [2022-07-22 12:53:21,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:53:21,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:53:21,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:53:21,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:53:21,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:53:21,356 INFO L87 Difference]: Start difference. First operand 98494 states and 109446 transitions. Second operand has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:23,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:53:23,295 INFO L93 Difference]: Finished difference Result 202509 states and 224564 transitions. [2022-07-22 12:53:23,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:53:23,296 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 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 489 [2022-07-22 12:53:23,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:53:23,540 INFO L225 Difference]: With dead ends: 202509 [2022-07-22 12:53:23,540 INFO L226 Difference]: Without dead ends: 100174 [2022-07-22 12:53:23,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:53:23,558 INFO L413 NwaCegarLoop]: 613 mSDtfsCounter, 487 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1165 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 487 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 1447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 1165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-22 12:53:23,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [487 Valid, 642 Invalid, 1447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 1165 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-22 12:53:23,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100174 states. [2022-07-22 12:53:24,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100174 to 90362. [2022-07-22 12:53:24,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90362 states, 90361 states have (on average 1.102931574462434) internal successors, (99662), 90361 states have internal predecessors, (99662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:24,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90362 states to 90362 states and 99662 transitions. [2022-07-22 12:53:24,602 INFO L78 Accepts]: Start accepts. Automaton has 90362 states and 99662 transitions. Word has length 489 [2022-07-22 12:53:24,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:53:24,602 INFO L495 AbstractCegarLoop]: Abstraction has 90362 states and 99662 transitions. [2022-07-22 12:53:24,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:24,603 INFO L276 IsEmpty]: Start isEmpty. Operand 90362 states and 99662 transitions. [2022-07-22 12:53:24,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2022-07-22 12:53:24,613 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:53:24,613 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-22 12:53:24,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-22 12:53:24,614 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:53:24,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:53:24,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1948426311, now seen corresponding path program 1 times [2022-07-22 12:53:24,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:53:24,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207083908] [2022-07-22 12:53:24,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:53:24,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:53:24,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:53:24,938 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 490 trivial. 0 not checked. [2022-07-22 12:53:24,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:53:24,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207083908] [2022-07-22 12:53:24,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207083908] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:53:24,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:53:24,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:53:24,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342995064] [2022-07-22 12:53:24,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:53:24,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:53:24,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:53:24,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:53:24,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:53:24,940 INFO L87 Difference]: Start difference. First operand 90362 states and 99662 transitions. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:26,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:53:26,889 INFO L93 Difference]: Finished difference Result 199471 states and 220093 transitions. [2022-07-22 12:53:26,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:53:26,890 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 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 491 [2022-07-22 12:53:26,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:53:27,021 INFO L225 Difference]: With dead ends: 199471 [2022-07-22 12:53:27,021 INFO L226 Difference]: Without dead ends: 108686 [2022-07-22 12:53:27,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:53:27,065 INFO L413 NwaCegarLoop]: 600 mSDtfsCounter, 458 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1221 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 1444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 1221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-22 12:53:27,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 638 Invalid, 1444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 1221 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-22 12:53:27,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108686 states. [2022-07-22 12:53:28,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108686 to 103547. [2022-07-22 12:53:28,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103547 states, 103546 states have (on average 1.0940837888474688) internal successors, (113288), 103546 states have internal predecessors, (113288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:28,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103547 states to 103547 states and 113288 transitions. [2022-07-22 12:53:28,394 INFO L78 Accepts]: Start accepts. Automaton has 103547 states and 113288 transitions. Word has length 491 [2022-07-22 12:53:28,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:53:28,394 INFO L495 AbstractCegarLoop]: Abstraction has 103547 states and 113288 transitions. [2022-07-22 12:53:28,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:28,394 INFO L276 IsEmpty]: Start isEmpty. Operand 103547 states and 113288 transitions. [2022-07-22 12:53:28,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2022-07-22 12:53:28,404 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:53:28,404 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:53:28,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-22 12:53:28,405 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:53:28,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:53:28,405 INFO L85 PathProgramCache]: Analyzing trace with hash 330176941, now seen corresponding path program 1 times [2022-07-22 12:53:28,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:53:28,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151700685] [2022-07-22 12:53:28,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:53:28,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:53:28,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:53:28,550 INFO L134 CoverageAnalysis]: Checked inductivity of 911 backedges. 390 proven. 0 refuted. 0 times theorem prover too weak. 521 trivial. 0 not checked. [2022-07-22 12:53:28,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:53:28,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151700685] [2022-07-22 12:53:28,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151700685] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:53:28,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:53:28,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:53:28,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880712935] [2022-07-22 12:53:28,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:53:28,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:53:28,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:53:28,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:53:28,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:53:28,552 INFO L87 Difference]: Start difference. First operand 103547 states and 113288 transitions. Second operand has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 2 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:29,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:53:29,900 INFO L93 Difference]: Finished difference Result 200692 states and 219132 transitions. [2022-07-22 12:53:29,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:53:29,908 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 2 states have internal predecessors, (205), 0 states have call successors, (0), 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 493 [2022-07-22 12:53:29,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:53:30,016 INFO L225 Difference]: With dead ends: 200692 [2022-07-22 12:53:30,016 INFO L226 Difference]: Without dead ends: 97143 [2022-07-22 12:53:30,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:53:30,071 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 604 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-22 12:53:30,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [604 Valid, 94 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-22 12:53:30,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97143 states. [2022-07-22 12:53:31,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97143 to 95850. [2022-07-22 12:53:31,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95850 states, 95849 states have (on average 1.088514225500527) internal successors, (104333), 95849 states have internal predecessors, (104333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:31,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95850 states to 95850 states and 104333 transitions. [2022-07-22 12:53:31,248 INFO L78 Accepts]: Start accepts. Automaton has 95850 states and 104333 transitions. Word has length 493 [2022-07-22 12:53:31,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:53:31,249 INFO L495 AbstractCegarLoop]: Abstraction has 95850 states and 104333 transitions. [2022-07-22 12:53:31,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 2 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:31,249 INFO L276 IsEmpty]: Start isEmpty. Operand 95850 states and 104333 transitions. [2022-07-22 12:53:31,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 565 [2022-07-22 12:53:31,264 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:53:31,264 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:53:31,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-22 12:53:31,264 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:53:31,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:53:31,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1800177179, now seen corresponding path program 1 times [2022-07-22 12:53:31,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:53:31,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086505859] [2022-07-22 12:53:31,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:53:31,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:53:31,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:53:31,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 771 proven. 72 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-07-22 12:53:31,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:53:31,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086505859] [2022-07-22 12:53:31,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086505859] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:53:31,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442031779] [2022-07-22 12:53:31,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:53:31,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:53:31,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:53:31,680 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 12:53:31,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 12:53:31,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:53:31,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 12:53:31,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:53:32,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 843 proven. 0 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-07-22 12:53:32,235 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 12:53:32,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442031779] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:53:32,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 12:53:32,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2022-07-22 12:53:32,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643241792] [2022-07-22 12:53:32,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:53:32,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:53:32,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:53:32,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:53:32,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-07-22 12:53:32,238 INFO L87 Difference]: Start difference. First operand 95850 states and 104333 transitions. Second operand has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:34,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:53:34,472 INFO L93 Difference]: Finished difference Result 194684 states and 211809 transitions. [2022-07-22 12:53:34,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:53:34,472 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 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 564 [2022-07-22 12:53:34,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:53:34,587 INFO L225 Difference]: With dead ends: 194684 [2022-07-22 12:53:34,587 INFO L226 Difference]: Without dead ends: 98836 [2022-07-22 12:53:34,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 563 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-07-22 12:53:34,633 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 845 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 2026 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 845 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 2333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 2026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-22 12:53:34,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [845 Valid, 264 Invalid, 2333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 2026 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-22 12:53:34,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98836 states. [2022-07-22 12:53:35,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98836 to 97985. [2022-07-22 12:53:35,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97985 states, 97984 states have (on average 1.0870856466361856) internal successors, (106517), 97984 states have internal predecessors, (106517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:35,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97985 states to 97985 states and 106517 transitions. [2022-07-22 12:53:35,888 INFO L78 Accepts]: Start accepts. Automaton has 97985 states and 106517 transitions. Word has length 564 [2022-07-22 12:53:35,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:53:35,888 INFO L495 AbstractCegarLoop]: Abstraction has 97985 states and 106517 transitions. [2022-07-22 12:53:35,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:35,888 INFO L276 IsEmpty]: Start isEmpty. Operand 97985 states and 106517 transitions. [2022-07-22 12:53:35,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 588 [2022-07-22 12:53:35,902 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:53:35,903 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:53:35,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 12:53:36,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-22 12:53:36,108 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:53:36,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:53:36,109 INFO L85 PathProgramCache]: Analyzing trace with hash -482078247, now seen corresponding path program 1 times [2022-07-22 12:53:36,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:53:36,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25979623] [2022-07-22 12:53:36,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:53:36,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:53:36,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:53:36,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 793 proven. 0 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2022-07-22 12:53:36,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:53:36,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25979623] [2022-07-22 12:53:36,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25979623] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:53:36,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:53:36,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:53:36,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017862937] [2022-07-22 12:53:36,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:53:36,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:53:36,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:53:36,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:53:36,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:53:36,243 INFO L87 Difference]: Start difference. First operand 97985 states and 106517 transitions. Second operand has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:38,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:53:38,241 INFO L93 Difference]: Finished difference Result 209168 states and 227282 transitions. [2022-07-22 12:53:38,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:53:38,241 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 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 587 [2022-07-22 12:53:38,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:53:38,375 INFO L225 Difference]: With dead ends: 209168 [2022-07-22 12:53:38,375 INFO L226 Difference]: Without dead ends: 111185 [2022-07-22 12:53:38,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:53:38,419 INFO L413 NwaCegarLoop]: 717 mSDtfsCounter, 322 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 1263 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 1337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-22 12:53:38,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 763 Invalid, 1337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1263 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-22 12:53:38,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111185 states. [2022-07-22 12:53:39,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111185 to 106069. [2022-07-22 12:53:39,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106069 states, 106068 states have (on average 1.084936078741939) internal successors, (115077), 106068 states have internal predecessors, (115077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:39,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106069 states to 106069 states and 115077 transitions. [2022-07-22 12:53:39,805 INFO L78 Accepts]: Start accepts. Automaton has 106069 states and 115077 transitions. Word has length 587 [2022-07-22 12:53:39,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:53:39,805 INFO L495 AbstractCegarLoop]: Abstraction has 106069 states and 115077 transitions. [2022-07-22 12:53:39,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.33333333333333) internal successors, (379), 3 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:39,805 INFO L276 IsEmpty]: Start isEmpty. Operand 106069 states and 115077 transitions. [2022-07-22 12:53:40,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 596 [2022-07-22 12:53:40,080 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:53:40,080 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:53:40,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-22 12:53:40,081 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:53:40,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:53:40,081 INFO L85 PathProgramCache]: Analyzing trace with hash 2099697401, now seen corresponding path program 1 times [2022-07-22 12:53:40,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:53:40,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340002735] [2022-07-22 12:53:40,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:53:40,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:53:40,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:53:40,252 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 323 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-07-22 12:53:40,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:53:40,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340002735] [2022-07-22 12:53:40,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340002735] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:53:40,253 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:53:40,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:53:40,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958682927] [2022-07-22 12:53:40,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:53:40,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:53:40,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:53:40,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:53:40,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:53:40,255 INFO L87 Difference]: Start difference. First operand 106069 states and 115077 transitions. Second operand has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:42,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:53:42,252 INFO L93 Difference]: Finished difference Result 221515 states and 240940 transitions. [2022-07-22 12:53:42,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:53:42,253 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 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 595 [2022-07-22 12:53:42,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:53:42,381 INFO L225 Difference]: With dead ends: 221515 [2022-07-22 12:53:42,381 INFO L226 Difference]: Without dead ends: 115448 [2022-07-22 12:53:42,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:53:42,409 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 426 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 1180 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 1383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 1180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-22 12:53:42,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [426 Valid, 278 Invalid, 1383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 1180 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-22 12:53:42,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115448 states. [2022-07-22 12:53:43,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115448 to 106932. [2022-07-22 12:53:43,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106932 states, 106931 states have (on average 1.087617248506046) internal successors, (116300), 106931 states have internal predecessors, (116300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:43,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106932 states to 106932 states and 116300 transitions. [2022-07-22 12:53:43,818 INFO L78 Accepts]: Start accepts. Automaton has 106932 states and 116300 transitions. Word has length 595 [2022-07-22 12:53:43,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:53:43,819 INFO L495 AbstractCegarLoop]: Abstraction has 106932 states and 116300 transitions. [2022-07-22 12:53:43,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:43,819 INFO L276 IsEmpty]: Start isEmpty. Operand 106932 states and 116300 transitions. [2022-07-22 12:53:43,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 599 [2022-07-22 12:53:43,834 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:53:43,834 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:53:43,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-22 12:53:43,834 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:53:43,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:53:43,835 INFO L85 PathProgramCache]: Analyzing trace with hash -961990347, now seen corresponding path program 1 times [2022-07-22 12:53:43,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:53:43,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817023967] [2022-07-22 12:53:43,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:53:43,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:53:44,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:53:44,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1465 backedges. 1051 proven. 0 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2022-07-22 12:53:44,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:53:44,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817023967] [2022-07-22 12:53:44,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817023967] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:53:44,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:53:44,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:53:44,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225581040] [2022-07-22 12:53:44,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:53:44,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:53:44,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:53:44,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:53:44,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:53:44,262 INFO L87 Difference]: Start difference. First operand 106932 states and 116300 transitions. Second operand has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:45,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:53:45,995 INFO L93 Difference]: Finished difference Result 223220 states and 242606 transitions. [2022-07-22 12:53:45,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:53:45,996 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 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 598 [2022-07-22 12:53:46,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:53:46,155 INFO L225 Difference]: With dead ends: 223220 [2022-07-22 12:53:46,155 INFO L226 Difference]: Without dead ends: 116290 [2022-07-22 12:53:46,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:53:46,224 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 383 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 1139 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 1249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-22 12:53:46,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [383 Valid, 343 Invalid, 1249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1139 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-22 12:53:46,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116290 states. [2022-07-22 12:53:47,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116290 to 112882. [2022-07-22 12:53:47,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112882 states, 112881 states have (on average 1.0858691896776251) internal successors, (122574), 112881 states have internal predecessors, (122574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:47,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112882 states to 112882 states and 122574 transitions. [2022-07-22 12:53:47,806 INFO L78 Accepts]: Start accepts. Automaton has 112882 states and 122574 transitions. Word has length 598 [2022-07-22 12:53:47,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:53:47,806 INFO L495 AbstractCegarLoop]: Abstraction has 112882 states and 122574 transitions. [2022-07-22 12:53:47,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:47,806 INFO L276 IsEmpty]: Start isEmpty. Operand 112882 states and 122574 transitions. [2022-07-22 12:53:47,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 601 [2022-07-22 12:53:47,820 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:53:47,820 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:53:47,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-22 12:53:47,821 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:53:47,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:53:47,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1573225274, now seen corresponding path program 1 times [2022-07-22 12:53:47,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:53:47,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475123196] [2022-07-22 12:53:47,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:53:47,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:53:47,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:53:47,986 INFO L134 CoverageAnalysis]: Checked inductivity of 583 backedges. 430 proven. 72 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-07-22 12:53:47,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:53:47,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475123196] [2022-07-22 12:53:47,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475123196] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:53:47,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360292106] [2022-07-22 12:53:47,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:53:47,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:53:47,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:53:47,989 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 12:53:47,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 12:53:48,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:53:48,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 770 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 12:53:48,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:53:48,591 INFO L134 CoverageAnalysis]: Checked inductivity of 583 backedges. 307 proven. 31 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-07-22 12:53:48,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 12:53:48,734 INFO L134 CoverageAnalysis]: Checked inductivity of 583 backedges. 338 proven. 0 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2022-07-22 12:53:48,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360292106] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 12:53:48,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 12:53:48,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 8 [2022-07-22 12:53:48,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25902569] [2022-07-22 12:53:48,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:53:48,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:53:48,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:53:48,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:53:48,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-07-22 12:53:48,737 INFO L87 Difference]: Start difference. First operand 112882 states and 122574 transitions. Second operand has 4 states, 4 states have (on average 109.5) internal successors, (438), 4 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:51,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:53:51,788 INFO L93 Difference]: Finished difference Result 239395 states and 259935 transitions. [2022-07-22 12:53:51,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:53:51,789 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 109.5) internal successors, (438), 4 states have internal predecessors, (438), 0 states have call successors, (0), 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 600 [2022-07-22 12:53:51,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:53:51,943 INFO L225 Difference]: With dead ends: 239395 [2022-07-22 12:53:51,943 INFO L226 Difference]: Without dead ends: 125238 [2022-07-22 12:53:51,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1203 GetRequests, 1196 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-07-22 12:53:51,992 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 889 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 2104 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 889 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 2538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 2104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-22 12:53:51,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [889 Valid, 150 Invalid, 2538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [434 Valid, 2104 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-22 12:53:52,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125238 states. [2022-07-22 12:53:53,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125238 to 120111. [2022-07-22 12:53:53,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120111 states, 120110 states have (on average 1.0878528015985347) internal successors, (130662), 120110 states have internal predecessors, (130662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:53,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120111 states to 120111 states and 130662 transitions. [2022-07-22 12:53:53,456 INFO L78 Accepts]: Start accepts. Automaton has 120111 states and 130662 transitions. Word has length 600 [2022-07-22 12:53:53,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:53:53,456 INFO L495 AbstractCegarLoop]: Abstraction has 120111 states and 130662 transitions. [2022-07-22 12:53:53,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 109.5) internal successors, (438), 4 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:53,457 INFO L276 IsEmpty]: Start isEmpty. Operand 120111 states and 130662 transitions. [2022-07-22 12:53:53,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 605 [2022-07-22 12:53:53,472 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:53:53,472 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:53:53,489 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-22 12:53:53,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:53:53,688 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:53:53,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:53:53,688 INFO L85 PathProgramCache]: Analyzing trace with hash 531792294, now seen corresponding path program 1 times [2022-07-22 12:53:53,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:53:53,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286861225] [2022-07-22 12:53:53,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:53:53,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:53:53,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:53:54,154 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 240 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:53:54,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:53:54,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286861225] [2022-07-22 12:53:54,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286861225] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:53:54,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993706748] [2022-07-22 12:53:54,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:53:54,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:53:54,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:53:54,160 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 12:53:54,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 12:53:54,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:53:54,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 746 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 12:53:54,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:53:54,790 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 194 proven. 82 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-22 12:53:54,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 12:53:55,281 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 276 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-22 12:53:55,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993706748] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 12:53:55,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 12:53:55,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 8 [2022-07-22 12:53:55,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985353440] [2022-07-22 12:53:55,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:53:55,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:53:55,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:53:55,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:53:55,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-22 12:53:55,284 INFO L87 Difference]: Start difference. First operand 120111 states and 130662 transitions. Second operand has 4 states, 4 states have (on average 143.5) internal successors, (574), 3 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:53:58,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:53:58,477 INFO L93 Difference]: Finished difference Result 252986 states and 274880 transitions. [2022-07-22 12:53:58,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:53:58,478 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 143.5) internal successors, (574), 3 states have internal predecessors, (574), 0 states have call successors, (0), 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 604 [2022-07-22 12:53:58,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:53:58,645 INFO L225 Difference]: With dead ends: 252986 [2022-07-22 12:53:58,645 INFO L226 Difference]: Without dead ends: 131602 [2022-07-22 12:53:58,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1210 GetRequests, 1204 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-22 12:53:58,700 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 545 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 2117 mSolverCounterSat, 624 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 2741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 624 IncrementalHoareTripleChecker+Valid, 2117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-22 12:53:58,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [545 Valid, 110 Invalid, 2741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [624 Valid, 2117 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-22 12:53:58,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131602 states.