./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e1ff0e6 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/array-examples/standard_sentinel.i.v+cfa-reducer.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 6060f0df556deb332d160eff8a39bcf699b67887fb6a475da5cd3837f5257af8 --- Real Ultimate output --- This is Ultimate 0.2.2-?-7e1ff0e [2023-02-14 21:23:46,202 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 21:23:46,203 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 21:23:46,233 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 21:23:46,233 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 21:23:46,236 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 21:23:46,238 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 21:23:46,240 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 21:23:46,242 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 21:23:46,246 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 21:23:46,247 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 21:23:46,249 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 21:23:46,249 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 21:23:46,253 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 21:23:46,255 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 21:23:46,256 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 21:23:46,257 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 21:23:46,258 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 21:23:46,259 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 21:23:46,264 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 21:23:46,265 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 21:23:46,266 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 21:23:46,267 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 21:23:46,267 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 21:23:46,274 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 21:23:46,274 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 21:23:46,274 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 21:23:46,276 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 21:23:46,276 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 21:23:46,277 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 21:23:46,277 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 21:23:46,279 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 21:23:46,280 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 21:23:46,281 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 21:23:46,282 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 21:23:46,282 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 21:23:46,283 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 21:23:46,283 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 21:23:46,283 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 21:23:46,284 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 21:23:46,284 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 21:23:46,285 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 21:23:46,307 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 21:23:46,308 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 21:23:46,308 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 21:23:46,308 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 21:23:46,309 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 21:23:46,309 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 21:23:46,310 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 21:23:46,310 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 21:23:46,310 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 21:23:46,310 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 21:23:46,311 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 21:23:46,311 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 21:23:46,311 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 21:23:46,312 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 21:23:46,312 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 21:23:46,312 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 21:23:46,312 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 21:23:46,312 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 21:23:46,312 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 21:23:46,313 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 21:23:46,313 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 21:23:46,313 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 21:23:46,313 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 21:23:46,313 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 21:23:46,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 21:23:46,314 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 21:23:46,314 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 21:23:46,314 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 21:23:46,315 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 21:23:46,315 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 21:23:46,315 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 21:23:46,315 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 21:23:46,315 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 21:23:46,315 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 21:23:46,316 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 21:23:46,316 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6060f0df556deb332d160eff8a39bcf699b67887fb6a475da5cd3837f5257af8 [2023-02-14 21:23:46,577 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 21:23:46,602 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 21:23:46,604 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 21:23:46,605 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 21:23:46,605 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 21:23:46,606 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c [2023-02-14 21:23:47,588 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 21:23:47,737 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 21:23:47,737 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c [2023-02-14 21:23:47,741 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c5ea6698/1325bc05d3ad489fb23d5961171b7a2d/FLAGe8e322c41 [2023-02-14 21:23:47,751 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c5ea6698/1325bc05d3ad489fb23d5961171b7a2d [2023-02-14 21:23:47,753 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 21:23:47,754 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 21:23:47,755 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 21:23:47,755 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 21:23:47,762 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 21:23:47,762 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 09:23:47" (1/1) ... [2023-02-14 21:23:47,763 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3def2569 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:23:47, skipping insertion in model container [2023-02-14 21:23:47,763 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 09:23:47" (1/1) ... [2023-02-14 21:23:47,768 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 21:23:47,782 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 21:23:47,892 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c[991,1004] [2023-02-14 21:23:47,897 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 21:23:47,904 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 21:23:47,917 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c[991,1004] [2023-02-14 21:23:47,918 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 21:23:47,929 INFO L208 MainTranslator]: Completed translation [2023-02-14 21:23:47,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:23:47 WrapperNode [2023-02-14 21:23:47,929 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 21:23:47,930 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 21:23:47,930 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 21:23:47,931 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 21:23:47,936 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:23:47" (1/1) ... [2023-02-14 21:23:47,943 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:23:47" (1/1) ... [2023-02-14 21:23:47,960 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 68 [2023-02-14 21:23:47,960 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 21:23:47,961 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 21:23:47,961 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 21:23:47,961 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 21:23:47,967 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:23:47" (1/1) ... [2023-02-14 21:23:47,967 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:23:47" (1/1) ... [2023-02-14 21:23:47,975 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:23:47" (1/1) ... [2023-02-14 21:23:47,975 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:23:47" (1/1) ... [2023-02-14 21:23:47,980 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:23:47" (1/1) ... [2023-02-14 21:23:47,987 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:23:47" (1/1) ... [2023-02-14 21:23:47,988 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:23:47" (1/1) ... [2023-02-14 21:23:47,989 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:23:47" (1/1) ... [2023-02-14 21:23:47,990 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 21:23:47,991 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 21:23:47,991 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 21:23:47,992 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 21:23:47,992 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:23:47" (1/1) ... [2023-02-14 21:23:47,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 21:23:48,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:23:48,022 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) [2023-02-14 21:23:48,028 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 [2023-02-14 21:23:48,053 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 21:23:48,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 21:23:48,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-14 21:23:48,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-14 21:23:48,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 21:23:48,055 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 21:23:48,055 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-14 21:23:48,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-14 21:23:48,118 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 21:23:48,121 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 21:23:48,278 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 21:23:48,287 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 21:23:48,292 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-14 21:23:48,294 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 09:23:48 BoogieIcfgContainer [2023-02-14 21:23:48,295 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 21:23:48,297 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 21:23:48,298 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 21:23:48,300 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 21:23:48,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 09:23:47" (1/3) ... [2023-02-14 21:23:48,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39023237 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 09:23:48, skipping insertion in model container [2023-02-14 21:23:48,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:23:47" (2/3) ... [2023-02-14 21:23:48,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39023237 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 09:23:48, skipping insertion in model container [2023-02-14 21:23:48,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 09:23:48" (3/3) ... [2023-02-14 21:23:48,303 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_sentinel.i.v+cfa-reducer.c [2023-02-14 21:23:48,320 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 21:23:48,321 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 21:23:48,374 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 21:23:48,380 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@53baf3b1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 21:23:48,381 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 21:23:48,384 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:23:48,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-14 21:23:48,391 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:23:48,391 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:23:48,392 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:23:48,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:23:48,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1960333522, now seen corresponding path program 1 times [2023-02-14 21:23:48,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:23:48,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892364455] [2023-02-14 21:23:48,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:23:48,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:23:48,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:23:48,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 21:23:48,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:23:48,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892364455] [2023-02-14 21:23:48,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892364455] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 21:23:48,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 21:23:48,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 21:23:48,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908878861] [2023-02-14 21:23:48,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 21:23:48,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 21:23:48,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:23:48,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 21:23:48,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 21:23:48,610 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 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 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:23:48,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:23:48,630 INFO L93 Difference]: Finished difference Result 26 states and 36 transitions. [2023-02-14 21:23:48,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 21:23:48,633 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2023-02-14 21:23:48,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:23:48,638 INFO L225 Difference]: With dead ends: 26 [2023-02-14 21:23:48,639 INFO L226 Difference]: Without dead ends: 13 [2023-02-14 21:23:48,641 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 [2023-02-14 21:23:48,644 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 21:23:48,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 28 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 21:23:48,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-02-14 21:23:48,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2023-02-14 21:23:48,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:23:48,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2023-02-14 21:23:48,669 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 9 [2023-02-14 21:23:48,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:23:48,670 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2023-02-14 21:23:48,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:23:48,670 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2023-02-14 21:23:48,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-14 21:23:48,671 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:23:48,671 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:23:48,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-14 21:23:48,671 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:23:48,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:23:48,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1620761708, now seen corresponding path program 1 times [2023-02-14 21:23:48,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:23:48,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750099424] [2023-02-14 21:23:48,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:23:48,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:23:48,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:23:48,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 21:23:48,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:23:48,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750099424] [2023-02-14 21:23:48,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750099424] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 21:23:48,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115368783] [2023-02-14 21:23:48,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:23:48,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:23:48,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:23:48,835 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) [2023-02-14 21:23:48,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 21:23:48,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:23:48,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-14 21:23:48,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:23:48,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 21:23:48,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 21:23:48,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 21:23:48,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115368783] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 21:23:48,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 21:23:48,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-14 21:23:48,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962322700] [2023-02-14 21:23:48,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 21:23:48,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 21:23:48,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:23:48,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 21:23:48,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-14 21:23:48,985 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:23:49,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:23:49,012 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2023-02-14 21:23:49,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 21:23:49,012 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 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 11 [2023-02-14 21:23:49,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:23:49,013 INFO L225 Difference]: With dead ends: 25 [2023-02-14 21:23:49,013 INFO L226 Difference]: Without dead ends: 18 [2023-02-14 21:23:49,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-14 21:23:49,015 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 21:23:49,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 42 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 21:23:49,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-02-14 21:23:49,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-02-14 21:23:49,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:23:49,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2023-02-14 21:23:49,020 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 11 [2023-02-14 21:23:49,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:23:49,020 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2023-02-14 21:23:49,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:23:49,020 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2023-02-14 21:23:49,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-14 21:23:49,021 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:23:49,021 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:23:49,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-14 21:23:49,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:23:49,229 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:23:49,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:23:49,229 INFO L85 PathProgramCache]: Analyzing trace with hash 47568678, now seen corresponding path program 2 times [2023-02-14 21:23:49,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:23:49,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824056514] [2023-02-14 21:23:49,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:23:49,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:23:49,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:23:49,418 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-14 21:23:49,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:23:49,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824056514] [2023-02-14 21:23:49,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824056514] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 21:23:49,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 21:23:49,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 21:23:49,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846721760] [2023-02-14 21:23:49,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 21:23:49,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 21:23:49,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:23:49,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 21:23:49,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 21:23:49,421 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:23:49,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:23:49,467 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2023-02-14 21:23:49,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 21:23:49,467 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 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 17 [2023-02-14 21:23:49,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:23:49,468 INFO L225 Difference]: With dead ends: 23 [2023-02-14 21:23:49,468 INFO L226 Difference]: Without dead ends: 20 [2023-02-14 21:23:49,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-14 21:23:49,470 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 10 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 21:23:49,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 24 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 21:23:49,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-02-14 21:23:49,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-02-14 21:23:49,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:23:49,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2023-02-14 21:23:49,474 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2023-02-14 21:23:49,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:23:49,475 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2023-02-14 21:23:49,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:23:49,475 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2023-02-14 21:23:49,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-14 21:23:49,476 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:23:49,476 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:23:49,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-14 21:23:49,476 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:23:49,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:23:49,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1533228919, now seen corresponding path program 1 times [2023-02-14 21:23:49,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:23:49,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780696536] [2023-02-14 21:23:49,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:23:49,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:23:49,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:23:49,654 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 21:23:49,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:23:49,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780696536] [2023-02-14 21:23:49,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780696536] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 21:23:49,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358155468] [2023-02-14 21:23:49,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:23:49,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:23:49,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:23:49,661 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) [2023-02-14 21:23:49,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 21:23:49,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:23:49,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-14 21:23:49,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:23:49,788 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 21:23:49,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 21:23:49,852 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 21:23:49,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358155468] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 21:23:49,853 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 21:23:49,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-02-14 21:23:49,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078467244] [2023-02-14 21:23:49,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 21:23:49,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-14 21:23:49,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:23:49,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-14 21:23:49,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-02-14 21:23:49,863 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:23:49,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:23:49,917 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2023-02-14 21:23:49,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-14 21:23:49,917 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 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 19 [2023-02-14 21:23:49,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:23:49,919 INFO L225 Difference]: With dead ends: 41 [2023-02-14 21:23:49,920 INFO L226 Difference]: Without dead ends: 32 [2023-02-14 21:23:49,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-02-14 21:23:49,922 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 21:23:49,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 42 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 21:23:49,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-14 21:23:49,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-02-14 21:23:49,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 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) [2023-02-14 21:23:49,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2023-02-14 21:23:49,932 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 19 [2023-02-14 21:23:49,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:23:49,933 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2023-02-14 21:23:49,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:23:49,933 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2023-02-14 21:23:49,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-14 21:23:49,934 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:23:49,934 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:23:49,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-14 21:23:50,139 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,SelfDestructingSolverStorable3 [2023-02-14 21:23:50,139 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:23:50,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:23:50,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1092675971, now seen corresponding path program 2 times [2023-02-14 21:23:50,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:23:50,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136900283] [2023-02-14 21:23:50,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:23:50,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:23:50,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:23:50,451 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 21:23:50,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:23:50,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136900283] [2023-02-14 21:23:50,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136900283] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 21:23:50,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929934351] [2023-02-14 21:23:50,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 21:23:50,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:23:50,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:23:50,459 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) [2023-02-14 21:23:50,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 21:23:50,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 21:23:50,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 21:23:50,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-14 21:23:50,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:23:50,613 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 21:23:50,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 21:23:50,823 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 21:23:50,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929934351] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 21:23:50,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 21:23:50,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-02-14 21:23:50,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210946002] [2023-02-14 21:23:50,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 21:23:50,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-14 21:23:50,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:23:50,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-14 21:23:50,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-02-14 21:23:50,826 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:23:50,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:23:50,884 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2023-02-14 21:23:50,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-14 21:23:50,885 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 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 31 [2023-02-14 21:23:50,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:23:50,886 INFO L225 Difference]: With dead ends: 65 [2023-02-14 21:23:50,886 INFO L226 Difference]: Without dead ends: 56 [2023-02-14 21:23:50,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-02-14 21:23:50,887 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 21:23:50,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 26 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 21:23:50,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-02-14 21:23:50,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2023-02-14 21:23:50,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:23:50,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2023-02-14 21:23:50,894 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 31 [2023-02-14 21:23:50,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:23:50,894 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2023-02-14 21:23:50,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:23:50,895 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2023-02-14 21:23:50,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-14 21:23:50,896 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:23:50,896 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:23:50,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-14 21:23:51,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:23:51,101 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:23:51,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:23:51,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1116944283, now seen corresponding path program 3 times [2023-02-14 21:23:51,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:23:51,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427009974] [2023-02-14 21:23:51,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:23:51,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:23:51,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:23:51,686 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 21:23:51,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:23:51,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427009974] [2023-02-14 21:23:51,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427009974] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 21:23:51,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364759483] [2023-02-14 21:23:51,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 21:23:51,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:23:51,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:23:51,689 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) [2023-02-14 21:23:51,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 21:23:51,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-14 21:23:51,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 21:23:51,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-14 21:23:51,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:23:51,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-14 21:23:51,840 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 21:23:51,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-02-14 21:23:51,950 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2023-02-14 21:23:51,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 21:23:52,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-02-14 21:23:52,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2023-02-14 21:23:52,067 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2023-02-14 21:23:52,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364759483] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 21:23:52,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 21:23:52,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 7, 7] total 34 [2023-02-14 21:23:52,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478899102] [2023-02-14 21:23:52,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 21:23:52,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-14 21:23:52,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:23:52,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-14 21:23:52,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=793, Unknown=0, NotChecked=0, Total=1122 [2023-02-14 21:23:52,071 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:23:52,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:23:52,332 INFO L93 Difference]: Finished difference Result 74 states and 78 transitions. [2023-02-14 21:23:52,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-14 21:23:52,333 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 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 55 [2023-02-14 21:23:52,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:23:52,334 INFO L225 Difference]: With dead ends: 74 [2023-02-14 21:23:52,334 INFO L226 Difference]: Without dead ends: 63 [2023-02-14 21:23:52,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=383, Invalid=1177, Unknown=0, NotChecked=0, Total=1560 [2023-02-14 21:23:52,335 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 15 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 21:23:52,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 39 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 21:23:52,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-02-14 21:23:52,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2023-02-14 21:23:52,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 61 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:23:52,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2023-02-14 21:23:52,342 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 55 [2023-02-14 21:23:52,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:23:52,342 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2023-02-14 21:23:52,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:23:52,343 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2023-02-14 21:23:52,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-02-14 21:23:52,343 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:23:52,343 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:23:52,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-14 21:23:52,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:23:52,544 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:23:52,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:23:52,545 INFO L85 PathProgramCache]: Analyzing trace with hash 2050640041, now seen corresponding path program 4 times [2023-02-14 21:23:52,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:23:52,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946947385] [2023-02-14 21:23:52,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:23:52,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:23:52,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:23:53,118 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 21:23:53,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:23:53,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946947385] [2023-02-14 21:23:53,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946947385] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 21:23:53,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828136012] [2023-02-14 21:23:53,118 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 21:23:53,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:23:53,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:23:53,123 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) [2023-02-14 21:23:53,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-14 21:23:53,216 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 21:23:53,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 21:23:53,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-14 21:23:53,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:23:53,286 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 21:23:53,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 21:23:54,036 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 21:23:54,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828136012] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 21:23:54,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 21:23:54,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2023-02-14 21:23:54,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229317391] [2023-02-14 21:23:54,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 21:23:54,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-02-14 21:23:54,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:23:54,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-02-14 21:23:54,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2023-02-14 21:23:54,039 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:23:54,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:23:54,163 INFO L93 Difference]: Finished difference Result 125 states and 151 transitions. [2023-02-14 21:23:54,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-02-14 21:23:54,164 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 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 61 [2023-02-14 21:23:54,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:23:54,165 INFO L225 Difference]: With dead ends: 125 [2023-02-14 21:23:54,165 INFO L226 Difference]: Without dead ends: 112 [2023-02-14 21:23:54,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2023-02-14 21:23:54,167 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 21:23:54,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 50 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 21:23:54,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-02-14 21:23:54,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2023-02-14 21:23:54,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.018018018018018) internal successors, (113), 111 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:23:54,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2023-02-14 21:23:54,192 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 61 [2023-02-14 21:23:54,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:23:54,193 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2023-02-14 21:23:54,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:23:54,193 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2023-02-14 21:23:54,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-02-14 21:23:54,197 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:23:54,198 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:23:54,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-14 21:23:54,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:23:54,404 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:23:54,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:23:54,404 INFO L85 PathProgramCache]: Analyzing trace with hash 747822775, now seen corresponding path program 5 times [2023-02-14 21:23:54,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:23:54,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606248498] [2023-02-14 21:23:54,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:23:54,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:23:54,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:23:56,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2316 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 21:23:56,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:23:56,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606248498] [2023-02-14 21:23:56,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606248498] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 21:23:56,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743643210] [2023-02-14 21:23:56,198 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 21:23:56,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:23:56,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:23:56,201 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) [2023-02-14 21:23:56,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-14 21:24:18,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2023-02-14 21:24:18,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 21:24:18,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-14 21:24:18,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:24:18,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2316 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 21:24:18,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 21:24:20,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2316 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 21:24:20,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743643210] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 21:24:20,892 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 21:24:20,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 101 [2023-02-14 21:24:20,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087581997] [2023-02-14 21:24:20,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 21:24:20,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-02-14 21:24:20,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:24:20,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-02-14 21:24:20,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2023-02-14 21:24:20,899 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand has 101 states, 101 states have (on average 2.0495049504950495) internal successors, (207), 101 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) [2023-02-14 21:24:21,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:24:21,166 INFO L93 Difference]: Finished difference Result 225 states and 276 transitions. [2023-02-14 21:24:21,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-02-14 21:24:21,167 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.0495049504950495) internal successors, (207), 101 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 111 [2023-02-14 21:24:21,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:24:21,172 INFO L225 Difference]: With dead ends: 225 [2023-02-14 21:24:21,172 INFO L226 Difference]: Without dead ends: 212 [2023-02-14 21:24:21,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2023-02-14 21:24:21,176 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 21:24:21,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 58 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 21:24:21,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2023-02-14 21:24:21,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2023-02-14 21:24:21,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.009478672985782) internal successors, (213), 211 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:24:21,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 213 transitions. [2023-02-14 21:24:21,201 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 213 transitions. Word has length 111 [2023-02-14 21:24:21,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:24:21,201 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 213 transitions. [2023-02-14 21:24:21,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.0495049504950495) internal successors, (207), 101 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) [2023-02-14 21:24:21,202 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 213 transitions. [2023-02-14 21:24:21,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2023-02-14 21:24:21,210 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:24:21,210 INFO L195 NwaCegarLoop]: trace histogram [98, 98, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:24:21,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-14 21:24:21,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:24:21,425 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:24:21,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:24:21,426 INFO L85 PathProgramCache]: Analyzing trace with hash -248951725, now seen corresponding path program 6 times [2023-02-14 21:24:21,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:24:21,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67548019] [2023-02-14 21:24:21,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:24:21,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:24:21,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:24:27,193 INFO L134 CoverageAnalysis]: Checked inductivity of 9616 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 21:24:27,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:24:27,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67548019] [2023-02-14 21:24:27,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67548019] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 21:24:27,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725114069] [2023-02-14 21:24:27,193 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-14 21:24:27,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:24:27,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:24:27,194 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 21:24:27,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-14 21:24:27,354 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-14 21:24:27,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 21:24:27,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-14 21:24:27,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:24:27,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-14 21:24:27,799 INFO L321 Elim1Store]: treesize reduction 8, result has 84.9 percent of original size [2023-02-14 21:24:27,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 59 [2023-02-14 21:24:28,042 INFO L134 CoverageAnalysis]: Checked inductivity of 9616 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9604 trivial. 0 not checked. [2023-02-14 21:24:28,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 21:24:28,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2023-02-14 21:24:28,701 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 21:24:28,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 70 [2023-02-14 21:24:28,776 INFO L134 CoverageAnalysis]: Checked inductivity of 9616 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9604 trivial. 0 not checked. [2023-02-14 21:24:28,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725114069] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 21:24:28,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 21:24:28,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 11, 11] total 118 [2023-02-14 21:24:28,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285310510] [2023-02-14 21:24:28,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 21:24:28,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2023-02-14 21:24:28,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:24:28,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2023-02-14 21:24:28,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5126, Invalid=8680, Unknown=0, NotChecked=0, Total=13806 [2023-02-14 21:24:28,786 INFO L87 Difference]: Start difference. First operand 212 states and 213 transitions. Second operand has 118 states, 118 states have (on average 1.9576271186440677) internal successors, (231), 118 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) [2023-02-14 21:24:30,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:24:30,342 INFO L93 Difference]: Finished difference Result 240 states and 246 transitions. [2023-02-14 21:24:30,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2023-02-14 21:24:30,344 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 1.9576271186440677) internal successors, (231), 118 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 211 [2023-02-14 21:24:30,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:24:30,345 INFO L225 Difference]: With dead ends: 240 [2023-02-14 21:24:30,345 INFO L226 Difference]: Without dead ends: 223 [2023-02-14 21:24:30,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 404 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1986 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=5281, Invalid=11489, Unknown=0, NotChecked=0, Total=16770 [2023-02-14 21:24:30,349 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 31 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 21:24:30,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 71 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 21:24:30,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2023-02-14 21:24:30,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 222. [2023-02-14 21:24:30,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 1.009049773755656) internal successors, (223), 221 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:24:30,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 223 transitions. [2023-02-14 21:24:30,359 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 223 transitions. Word has length 211 [2023-02-14 21:24:30,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:24:30,360 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 223 transitions. [2023-02-14 21:24:30,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 1.9576271186440677) internal successors, (231), 118 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) [2023-02-14 21:24:30,360 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 223 transitions. [2023-02-14 21:24:30,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2023-02-14 21:24:30,362 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:24:30,362 INFO L195 NwaCegarLoop]: trace histogram [99, 99, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:24:30,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-14 21:24:30,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:24:30,568 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:24:30,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:24:30,568 INFO L85 PathProgramCache]: Analyzing trace with hash 51532317, now seen corresponding path program 7 times [2023-02-14 21:24:30,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:24:30,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846438082] [2023-02-14 21:24:30,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:24:30,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:24:30,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:24:35,816 INFO L134 CoverageAnalysis]: Checked inductivity of 9857 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-14 21:24:35,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:24:35,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846438082] [2023-02-14 21:24:35,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846438082] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 21:24:35,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413488957] [2023-02-14 21:24:35,817 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-14 21:24:35,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:24:35,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:24:35,819 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 21:24:35,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-14 21:24:36,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:24:36,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 993 conjuncts, 101 conjunts are in the unsatisfiable core [2023-02-14 21:24:36,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:24:36,325 INFO L134 CoverageAnalysis]: Checked inductivity of 9857 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-14 21:24:36,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 21:24:45,562 INFO L134 CoverageAnalysis]: Checked inductivity of 9857 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-14 21:24:45,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413488957] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 21:24:45,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 21:24:45,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102, 102] total 203 [2023-02-14 21:24:45,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621728649] [2023-02-14 21:24:45,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 21:24:45,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2023-02-14 21:24:45,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:24:45,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2023-02-14 21:24:45,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2023-02-14 21:24:45,576 INFO L87 Difference]: Start difference. First operand 222 states and 223 transitions. Second operand has 203 states, 203 states have (on average 2.0246305418719213) internal successors, (411), 203 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:24:46,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:24:46,223 INFO L93 Difference]: Finished difference Result 445 states and 547 transitions. [2023-02-14 21:24:46,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2023-02-14 21:24:46,225 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 2.0246305418719213) internal successors, (411), 203 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 221 [2023-02-14 21:24:46,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:24:46,227 INFO L225 Difference]: With dead ends: 445 [2023-02-14 21:24:46,227 INFO L226 Difference]: Without dead ends: 424 [2023-02-14 21:24:46,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 542 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2023-02-14 21:24:46,231 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 21:24:46,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 58 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 21:24:46,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2023-02-14 21:24:46,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 424. [2023-02-14 21:24:46,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 1.0047281323877069) internal successors, (425), 423 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:24:46,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 425 transitions. [2023-02-14 21:24:46,244 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 425 transitions. Word has length 221 [2023-02-14 21:24:46,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:24:46,245 INFO L495 AbstractCegarLoop]: Abstraction has 424 states and 425 transitions. [2023-02-14 21:24:46,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 2.0246305418719213) internal successors, (411), 203 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:24:46,245 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 425 transitions. [2023-02-14 21:24:46,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2023-02-14 21:24:46,250 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:24:46,250 INFO L195 NwaCegarLoop]: trace histogram [200, 200, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:24:46,257 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-02-14 21:24:46,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-14 21:24:46,458 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:24:46,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:24:46,458 INFO L85 PathProgramCache]: Analyzing trace with hash -2065698413, now seen corresponding path program 8 times [2023-02-14 21:24:46,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:24:46,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473423032] [2023-02-14 21:24:46,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:24:46,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:24:46,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:25:06,028 INFO L134 CoverageAnalysis]: Checked inductivity of 40056 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-14 21:25:06,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:25:06,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473423032] [2023-02-14 21:25:06,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473423032] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 21:25:06,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244113230] [2023-02-14 21:25:06,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 21:25:06,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:25:06,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:25:06,036 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 21:25:06,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-14 21:25:06,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 21:25:06,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 21:25:06,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 1902 conjuncts, 202 conjunts are in the unsatisfiable core [2023-02-14 21:25:06,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:25:06,955 INFO L134 CoverageAnalysis]: Checked inductivity of 40056 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-14 21:25:06,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 21:25:44,036 INFO L134 CoverageAnalysis]: Checked inductivity of 40056 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-14 21:25:44,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244113230] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 21:25:44,037 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 21:25:44,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [203, 203, 203] total 405 [2023-02-14 21:25:44,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066209121] [2023-02-14 21:25:44,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 21:25:44,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2023-02-14 21:25:44,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:25:44,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2023-02-14 21:25:44,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81810, Invalid=81810, Unknown=0, NotChecked=0, Total=163620 [2023-02-14 21:25:44,059 INFO L87 Difference]: Start difference. First operand 424 states and 425 transitions. Second operand has 405 states, 405 states have (on average 2.0123456790123457) internal successors, (815), 405 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:25:46,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:25:46,988 INFO L93 Difference]: Finished difference Result 849 states and 1052 transitions. [2023-02-14 21:25:46,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2023-02-14 21:25:46,989 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 2.0123456790123457) internal successors, (815), 405 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 423 [2023-02-14 21:25:46,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:25:46,992 INFO L225 Difference]: With dead ends: 849 [2023-02-14 21:25:46,992 INFO L226 Difference]: Without dead ends: 828 [2023-02-14 21:25:46,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1047 GetRequests, 644 SyntacticMatches, 0 SemanticMatches, 403 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 48.6s TimeCoverageRelationStatistics Valid=81810, Invalid=81810, Unknown=0, NotChecked=0, Total=163620 [2023-02-14 21:25:47,000 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-14 21:25:47,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 82 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 816 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-14 21:25:47,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2023-02-14 21:25:47,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 828. [2023-02-14 21:25:47,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 827 states have (on average 1.0024183796856105) internal successors, (829), 827 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:25:47,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 829 transitions. [2023-02-14 21:25:47,020 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 829 transitions. Word has length 423 [2023-02-14 21:25:47,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:25:47,021 INFO L495 AbstractCegarLoop]: Abstraction has 828 states and 829 transitions. [2023-02-14 21:25:47,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 2.0123456790123457) internal successors, (815), 405 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 21:25:47,022 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 829 transitions. [2023-02-14 21:25:47,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 828 [2023-02-14 21:25:47,041 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:25:47,041 INFO L195 NwaCegarLoop]: trace histogram [402, 402, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:25:47,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-14 21:25:47,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:25:47,249 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:25:47,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:25:47,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1050784257, now seen corresponding path program 9 times [2023-02-14 21:25:47,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:25:47,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709562038] [2023-02-14 21:25:47,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:25:47,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:25:48,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:27:13,427 INFO L134 CoverageAnalysis]: Checked inductivity of 161660 backedges. 0 proven. 161604 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-14 21:27:13,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:27:13,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709562038] [2023-02-14 21:27:13,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709562038] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 21:27:13,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976710528] [2023-02-14 21:27:13,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 21:27:13,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:27:13,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:27:13,431 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 21:27:13,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-14 21:27:13,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-02-14 21:27:13,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 21:27:13,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 47 conjunts are in the unsatisfiable core [2023-02-14 21:27:13,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:27:14,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-14 21:27:17,632 INFO L321 Elim1Store]: treesize reduction 24, result has 86.4 percent of original size [2023-02-14 21:27:17,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 183 [2023-02-14 21:27:18,513 INFO L134 CoverageAnalysis]: Checked inductivity of 161660 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 161604 trivial. 0 not checked. [2023-02-14 21:27:18,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 21:27:22,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 102 [2023-02-14 21:27:22,753 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 21:27:22,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 149 treesize of output 220 [2023-02-14 21:27:23,084 INFO L134 CoverageAnalysis]: Checked inductivity of 161660 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 161604 trivial. 0 not checked. [2023-02-14 21:27:23,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976710528] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 21:27:23,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 21:27:23,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [405, 19, 19] total 438 [2023-02-14 21:27:23,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432967723] [2023-02-14 21:27:23,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 21:27:23,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 438 states [2023-02-14 21:27:23,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:27:23,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 438 interpolants. [2023-02-14 21:27:23,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82054, Invalid=109352, Unknown=0, NotChecked=0, Total=191406 [2023-02-14 21:27:23,111 INFO L87 Difference]: Start difference. First operand 828 states and 829 transitions. Second operand has 438 states, 438 states have (on average 1.952054794520548) internal successors, (855), 438 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)