./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.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 a5deaf1c7eecf4d76182f6b98ab14efecb2cf3c3c2e7d8162af75087f90c331b --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 05:23:47,930 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 05:23:47,933 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 05:23:47,965 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 05:23:47,965 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 05:23:47,967 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 05:23:47,971 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 05:23:47,974 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 05:23:47,975 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 05:23:47,979 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 05:23:47,980 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 05:23:47,985 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 05:23:47,985 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 05:23:47,986 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 05:23:47,988 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 05:23:47,989 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 05:23:47,990 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 05:23:47,991 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 05:23:47,993 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 05:23:47,998 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 05:23:47,999 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 05:23:48,001 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 05:23:48,001 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 05:23:48,003 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 05:23:48,004 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 05:23:48,009 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 05:23:48,011 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 05:23:48,012 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 05:23:48,012 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 05:23:48,013 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 05:23:48,014 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 05:23:48,014 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 05:23:48,015 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 05:23:48,016 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 05:23:48,017 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 05:23:48,018 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 05:23:48,018 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 05:23:48,020 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 05:23:48,020 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 05:23:48,020 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 05:23:48,021 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 05:23:48,022 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 05:23:48,027 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 05:23:48,051 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 05:23:48,051 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 05:23:48,052 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 05:23:48,052 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 05:23:48,053 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 05:23:48,053 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 05:23:48,053 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 05:23:48,054 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 05:23:48,054 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 05:23:48,055 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 05:23:48,055 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 05:23:48,055 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 05:23:48,055 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 05:23:48,055 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 05:23:48,062 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 05:23:48,063 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 05:23:48,063 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 05:23:48,063 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 05:23:48,063 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 05:23:48,063 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 05:23:48,064 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 05:23:48,064 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 05:23:48,064 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 05:23:48,064 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 05:23:48,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 05:23:48,065 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 05:23:48,065 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 05:23:48,065 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 05:23:48,065 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 05:23:48,065 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 05:23:48,066 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 05:23:48,066 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 05:23:48,066 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 05:23:48,066 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a5deaf1c7eecf4d76182f6b98ab14efecb2cf3c3c2e7d8162af75087f90c331b [2022-07-21 05:23:48,354 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 05:23:48,376 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 05:23:48,379 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 05:23:48,380 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 05:23:48,380 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 05:23:48,383 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c [2022-07-21 05:23:48,439 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9d789ec1/daa47bf014884a0aa47c05ef64ac08d2/FLAGb1d612a90 [2022-07-21 05:23:48,911 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 05:23:48,911 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c [2022-07-21 05:23:48,920 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9d789ec1/daa47bf014884a0aa47c05ef64ac08d2/FLAGb1d612a90 [2022-07-21 05:23:48,940 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9d789ec1/daa47bf014884a0aa47c05ef64ac08d2 [2022-07-21 05:23:48,942 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 05:23:48,943 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 05:23:48,945 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 05:23:48,945 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 05:23:48,949 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 05:23:48,949 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:23:48" (1/1) ... [2022-07-21 05:23:48,950 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@750f6a6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:23:48, skipping insertion in model container [2022-07-21 05:23:48,950 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:23:48" (1/1) ... [2022-07-21 05:23:48,957 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 05:23:48,995 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 05:23:49,223 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c[6844,6857] [2022-07-21 05:23:49,225 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 05:23:49,242 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 05:23:49,296 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c[6844,6857] [2022-07-21 05:23:49,300 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 05:23:49,314 INFO L208 MainTranslator]: Completed translation [2022-07-21 05:23:49,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:23:49 WrapperNode [2022-07-21 05:23:49,314 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 05:23:49,316 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 05:23:49,316 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 05:23:49,316 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 05:23:49,321 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:23:49" (1/1) ... [2022-07-21 05:23:49,342 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:23:49" (1/1) ... [2022-07-21 05:23:49,376 INFO L137 Inliner]: procedures = 21, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 253 [2022-07-21 05:23:49,379 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 05:23:49,380 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 05:23:49,380 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 05:23:49,380 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 05:23:49,387 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:23:49" (1/1) ... [2022-07-21 05:23:49,388 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:23:49" (1/1) ... [2022-07-21 05:23:49,404 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:23:49" (1/1) ... [2022-07-21 05:23:49,404 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:23:49" (1/1) ... [2022-07-21 05:23:49,409 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:23:49" (1/1) ... [2022-07-21 05:23:49,413 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:23:49" (1/1) ... [2022-07-21 05:23:49,415 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:23:49" (1/1) ... [2022-07-21 05:23:49,417 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 05:23:49,418 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 05:23:49,418 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 05:23:49,418 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 05:23:49,419 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:23:49" (1/1) ... [2022-07-21 05:23:49,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 05:23:49,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:23:49,456 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-21 05:23:49,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-21 05:23:49,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 05:23:49,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 05:23:49,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 05:23:49,508 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 05:23:49,602 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 05:23:49,613 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 05:23:49,953 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 05:23:49,959 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 05:23:49,961 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-21 05:23:49,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:23:49 BoogieIcfgContainer [2022-07-21 05:23:49,963 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 05:23:49,965 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 05:23:49,965 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 05:23:49,968 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 05:23:49,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:23:48" (1/3) ... [2022-07-21 05:23:49,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a1a50da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:23:49, skipping insertion in model container [2022-07-21 05:23:49,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:23:49" (2/3) ... [2022-07-21 05:23:49,970 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a1a50da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:23:49, skipping insertion in model container [2022-07-21 05:23:49,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:23:49" (3/3) ... [2022-07-21 05:23:49,971 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c [2022-07-21 05:23:49,982 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 05:23:49,983 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 05:23:50,039 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 05:23:50,048 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@240f9fdb, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1cd7d5ca [2022-07-21 05:23:50,048 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 05:23:50,054 INFO L276 IsEmpty]: Start isEmpty. Operand has 79 states, 77 states have (on average 1.6753246753246753) internal successors, (129), 78 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:50,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-21 05:23:50,062 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:23:50,062 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:23:50,063 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:23:50,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:23:50,068 INFO L85 PathProgramCache]: Analyzing trace with hash 233700331, now seen corresponding path program 1 times [2022-07-21 05:23:50,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:23:50,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776333526] [2022-07-21 05:23:50,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:23:50,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:23:50,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:23:50,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:23:50,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:23:50,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776333526] [2022-07-21 05:23:50,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776333526] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:23:50,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:23:50,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 05:23:50,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350194746] [2022-07-21 05:23:50,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:23:50,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 05:23:50,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:23:50,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 05:23:50,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 05:23:50,374 INFO L87 Difference]: Start difference. First operand has 79 states, 77 states have (on average 1.6753246753246753) internal successors, (129), 78 states have internal predecessors, (129), 0 states have call successors, (0), 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 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:50,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:23:50,487 INFO L93 Difference]: Finished difference Result 191 states and 307 transitions. [2022-07-21 05:23:50,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 05:23:50,489 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2022-07-21 05:23:50,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:23:50,497 INFO L225 Difference]: With dead ends: 191 [2022-07-21 05:23:50,498 INFO L226 Difference]: Without dead ends: 127 [2022-07-21 05:23:50,500 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 [2022-07-21 05:23:50,503 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 84 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 05:23:50,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 465 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 05:23:50,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-21 05:23:50,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 75. [2022-07-21 05:23:50,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.4189189189189189) internal successors, (105), 74 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:50,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 105 transitions. [2022-07-21 05:23:50,537 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 105 transitions. Word has length 25 [2022-07-21 05:23:50,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:23:50,537 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 105 transitions. [2022-07-21 05:23:50,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:50,538 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 105 transitions. [2022-07-21 05:23:50,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-21 05:23:50,539 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:23:50,539 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:23:50,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 05:23:50,539 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:23:50,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:23:50,540 INFO L85 PathProgramCache]: Analyzing trace with hash 182027041, now seen corresponding path program 1 times [2022-07-21 05:23:50,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:23:50,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024682594] [2022-07-21 05:23:50,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:23:50,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:23:50,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:23:50,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:23:50,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:23:50,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024682594] [2022-07-21 05:23:50,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024682594] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:23:50,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:23:50,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 05:23:50,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71983881] [2022-07-21 05:23:50,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:23:50,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 05:23:50,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:23:50,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 05:23:50,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 05:23:50,613 INFO L87 Difference]: Start difference. First operand 75 states and 105 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:50,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:23:50,633 INFO L93 Difference]: Finished difference Result 167 states and 249 transitions. [2022-07-21 05:23:50,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 05:23:50,633 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2022-07-21 05:23:50,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:23:50,635 INFO L225 Difference]: With dead ends: 167 [2022-07-21 05:23:50,635 INFO L226 Difference]: Without dead ends: 115 [2022-07-21 05:23:50,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 05:23:50,637 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 70 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:23:50,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 236 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:23:50,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-21 05:23:50,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2022-07-21 05:23:50,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.4732142857142858) internal successors, (165), 112 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:50,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 165 transitions. [2022-07-21 05:23:50,649 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 165 transitions. Word has length 41 [2022-07-21 05:23:50,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:23:50,649 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 165 transitions. [2022-07-21 05:23:50,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:50,649 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 165 transitions. [2022-07-21 05:23:50,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-21 05:23:50,651 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:23:50,651 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:23:50,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 05:23:50,651 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:23:50,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:23:50,652 INFO L85 PathProgramCache]: Analyzing trace with hash 54990345, now seen corresponding path program 1 times [2022-07-21 05:23:50,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:23:50,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549544436] [2022-07-21 05:23:50,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:23:50,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:23:50,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:23:50,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:23:50,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:23:50,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549544436] [2022-07-21 05:23:50,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549544436] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:23:50,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:23:50,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 05:23:50,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781180742] [2022-07-21 05:23:50,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:23:50,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 05:23:50,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:23:50,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 05:23:50,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 05:23:50,709 INFO L87 Difference]: Start difference. First operand 113 states and 165 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:50,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:23:50,730 INFO L93 Difference]: Finished difference Result 269 states and 409 transitions. [2022-07-21 05:23:50,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 05:23:50,730 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 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 42 [2022-07-21 05:23:50,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:23:50,732 INFO L225 Difference]: With dead ends: 269 [2022-07-21 05:23:50,732 INFO L226 Difference]: Without dead ends: 179 [2022-07-21 05:23:50,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 05:23:50,734 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 65 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:23:50,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 227 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:23:50,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-07-21 05:23:50,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 177. [2022-07-21 05:23:50,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.5) internal successors, (264), 176 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:50,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 264 transitions. [2022-07-21 05:23:50,751 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 264 transitions. Word has length 42 [2022-07-21 05:23:50,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:23:50,751 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 264 transitions. [2022-07-21 05:23:50,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:50,752 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 264 transitions. [2022-07-21 05:23:50,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-21 05:23:50,752 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:23:50,753 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:23:50,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 05:23:50,753 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:23:50,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:23:50,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1508061361, now seen corresponding path program 1 times [2022-07-21 05:23:50,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:23:50,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945890551] [2022-07-21 05:23:50,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:23:50,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:23:50,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:23:50,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:23:50,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:23:50,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945890551] [2022-07-21 05:23:50,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945890551] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:23:50,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:23:50,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 05:23:50,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809047474] [2022-07-21 05:23:50,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:23:50,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 05:23:50,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:23:50,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 05:23:50,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 05:23:50,817 INFO L87 Difference]: Start difference. First operand 177 states and 264 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:50,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:23:50,842 INFO L93 Difference]: Finished difference Result 437 states and 666 transitions. [2022-07-21 05:23:50,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 05:23:50,843 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2022-07-21 05:23:50,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:23:50,848 INFO L225 Difference]: With dead ends: 437 [2022-07-21 05:23:50,848 INFO L226 Difference]: Without dead ends: 283 [2022-07-21 05:23:50,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 05:23:50,852 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 60 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:23:50,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 218 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:23:50,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-07-21 05:23:50,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 281. [2022-07-21 05:23:50,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 1.5) internal successors, (420), 280 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:50,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 420 transitions. [2022-07-21 05:23:50,903 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 420 transitions. Word has length 43 [2022-07-21 05:23:50,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:23:50,904 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 420 transitions. [2022-07-21 05:23:50,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:50,905 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 420 transitions. [2022-07-21 05:23:50,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-21 05:23:50,907 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:23:50,907 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:23:50,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 05:23:50,907 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:23:50,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:23:50,909 INFO L85 PathProgramCache]: Analyzing trace with hash -922713191, now seen corresponding path program 1 times [2022-07-21 05:23:50,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:23:50,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244927351] [2022-07-21 05:23:50,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:23:50,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:23:50,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:23:51,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:23:51,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:23:51,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244927351] [2022-07-21 05:23:51,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244927351] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:23:51,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:23:51,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 05:23:51,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698355750] [2022-07-21 05:23:51,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:23:51,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 05:23:51,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:23:51,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 05:23:51,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 05:23:51,038 INFO L87 Difference]: Start difference. First operand 281 states and 420 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:51,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:23:51,200 INFO L93 Difference]: Finished difference Result 1313 states and 2008 transitions. [2022-07-21 05:23:51,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 05:23:51,201 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 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 44 [2022-07-21 05:23:51,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:23:51,207 INFO L225 Difference]: With dead ends: 1313 [2022-07-21 05:23:51,207 INFO L226 Difference]: Without dead ends: 1055 [2022-07-21 05:23:51,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-21 05:23:51,214 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 412 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 05:23:51,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [412 Valid, 551 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 05:23:51,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2022-07-21 05:23:51,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 537. [2022-07-21 05:23:51,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 536 states have (on average 1.492537313432836) internal successors, (800), 536 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:51,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 800 transitions. [2022-07-21 05:23:51,276 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 800 transitions. Word has length 44 [2022-07-21 05:23:51,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:23:51,276 INFO L495 AbstractCegarLoop]: Abstraction has 537 states and 800 transitions. [2022-07-21 05:23:51,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:51,279 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 800 transitions. [2022-07-21 05:23:51,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-21 05:23:51,283 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:23:51,284 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:23:51,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 05:23:51,284 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:23:51,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:23:51,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1077338731, now seen corresponding path program 1 times [2022-07-21 05:23:51,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:23:51,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032462778] [2022-07-21 05:23:51,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:23:51,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:23:51,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:23:51,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:23:51,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:23:51,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032462778] [2022-07-21 05:23:51,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032462778] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:23:51,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:23:51,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 05:23:51,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652884373] [2022-07-21 05:23:51,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:23:51,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 05:23:51,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:23:51,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 05:23:51,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-21 05:23:51,409 INFO L87 Difference]: Start difference. First operand 537 states and 800 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:51,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:23:51,570 INFO L93 Difference]: Finished difference Result 1911 states and 2843 transitions. [2022-07-21 05:23:51,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 05:23:51,571 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 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 45 [2022-07-21 05:23:51,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:23:51,576 INFO L225 Difference]: With dead ends: 1911 [2022-07-21 05:23:51,577 INFO L226 Difference]: Without dead ends: 1397 [2022-07-21 05:23:51,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-21 05:23:51,578 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 209 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:23:51,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 294 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:23:51,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2022-07-21 05:23:51,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 1393. [2022-07-21 05:23:51,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1393 states, 1392 states have (on average 1.471264367816092) internal successors, (2048), 1392 states have internal predecessors, (2048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:51,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 2048 transitions. [2022-07-21 05:23:51,700 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 2048 transitions. Word has length 45 [2022-07-21 05:23:51,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:23:51,702 INFO L495 AbstractCegarLoop]: Abstraction has 1393 states and 2048 transitions. [2022-07-21 05:23:51,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:51,702 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 2048 transitions. [2022-07-21 05:23:51,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-21 05:23:51,704 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:23:51,704 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:23:51,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 05:23:51,705 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:23:51,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:23:51,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1270898830, now seen corresponding path program 1 times [2022-07-21 05:23:51,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:23:51,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559255926] [2022-07-21 05:23:51,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:23:51,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:23:51,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:23:51,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:23:51,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:23:51,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559255926] [2022-07-21 05:23:51,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559255926] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:23:51,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:23:51,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 05:23:51,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375166186] [2022-07-21 05:23:51,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:23:51,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 05:23:51,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:23:51,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 05:23:51,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 05:23:51,801 INFO L87 Difference]: Start difference. First operand 1393 states and 2048 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:52,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:23:52,109 INFO L93 Difference]: Finished difference Result 2955 states and 4265 transitions. [2022-07-21 05:23:52,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 05:23:52,110 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 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 46 [2022-07-21 05:23:52,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:23:52,120 INFO L225 Difference]: With dead ends: 2955 [2022-07-21 05:23:52,120 INFO L226 Difference]: Without dead ends: 2953 [2022-07-21 05:23:52,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-21 05:23:52,121 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 225 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:23:52,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 455 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:23:52,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2953 states. [2022-07-21 05:23:52,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2953 to 1537. [2022-07-21 05:23:52,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1537 states, 1536 states have (on average 1.4270833333333333) internal successors, (2192), 1536 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:52,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1537 states to 1537 states and 2192 transitions. [2022-07-21 05:23:52,272 INFO L78 Accepts]: Start accepts. Automaton has 1537 states and 2192 transitions. Word has length 46 [2022-07-21 05:23:52,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:23:52,273 INFO L495 AbstractCegarLoop]: Abstraction has 1537 states and 2192 transitions. [2022-07-21 05:23:52,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:52,273 INFO L276 IsEmpty]: Start isEmpty. Operand 1537 states and 2192 transitions. [2022-07-21 05:23:52,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-21 05:23:52,274 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:23:52,274 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:23:52,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 05:23:52,274 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:23:52,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:23:52,275 INFO L85 PathProgramCache]: Analyzing trace with hash 795736558, now seen corresponding path program 1 times [2022-07-21 05:23:52,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:23:52,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121799905] [2022-07-21 05:23:52,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:23:52,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:23:52,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:23:52,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:23:52,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:23:52,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121799905] [2022-07-21 05:23:52,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121799905] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:23:52,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:23:52,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 05:23:52,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899432214] [2022-07-21 05:23:52,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:23:52,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 05:23:52,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:23:52,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 05:23:52,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 05:23:52,319 INFO L87 Difference]: Start difference. First operand 1537 states and 2192 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:52,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:23:52,504 INFO L93 Difference]: Finished difference Result 3651 states and 5220 transitions. [2022-07-21 05:23:52,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 05:23:52,505 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 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 47 [2022-07-21 05:23:52,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:23:52,513 INFO L225 Difference]: With dead ends: 3651 [2022-07-21 05:23:52,513 INFO L226 Difference]: Without dead ends: 2137 [2022-07-21 05:23:52,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 05:23:52,516 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 51 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:23:52,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 205 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:23:52,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2137 states. [2022-07-21 05:23:52,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2137 to 2135. [2022-07-21 05:23:52,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2135 states, 2134 states have (on average 1.4198687910028116) internal successors, (3030), 2134 states have internal predecessors, (3030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:52,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2135 states to 2135 states and 3030 transitions. [2022-07-21 05:23:52,705 INFO L78 Accepts]: Start accepts. Automaton has 2135 states and 3030 transitions. Word has length 47 [2022-07-21 05:23:52,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:23:52,706 INFO L495 AbstractCegarLoop]: Abstraction has 2135 states and 3030 transitions. [2022-07-21 05:23:52,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:52,707 INFO L276 IsEmpty]: Start isEmpty. Operand 2135 states and 3030 transitions. [2022-07-21 05:23:52,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-21 05:23:52,708 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:23:52,709 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:23:52,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 05:23:52,710 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:23:52,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:23:52,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1282796535, now seen corresponding path program 1 times [2022-07-21 05:23:52,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:23:52,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045270340] [2022-07-21 05:23:52,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:23:52,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:23:52,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:23:52,840 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 05:23:52,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:23:52,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045270340] [2022-07-21 05:23:52,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045270340] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:23:52,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067712314] [2022-07-21 05:23:52,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:23:52,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:23:52,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:23:52,843 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:23:52,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 05:23:52,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:23:52,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-21 05:23:52,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:23:53,133 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 05:23:53,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:23:53,405 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 05:23:53,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067712314] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:23:53,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:23:53,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 4] total 10 [2022-07-21 05:23:53,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764875540] [2022-07-21 05:23:53,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:23:53,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-21 05:23:53,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:23:53,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-21 05:23:53,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-07-21 05:23:53,408 INFO L87 Difference]: Start difference. First operand 2135 states and 3030 transitions. Second operand has 10 states, 10 states have (on average 18.1) internal successors, (181), 10 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:53,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:23:53,809 INFO L93 Difference]: Finished difference Result 6595 states and 9454 transitions. [2022-07-21 05:23:53,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 05:23:53,810 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 18.1) internal successors, (181), 10 states have internal predecessors, (181), 0 states have call successors, (0), 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 66 [2022-07-21 05:23:53,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:23:53,827 INFO L225 Difference]: With dead ends: 6595 [2022-07-21 05:23:53,828 INFO L226 Difference]: Without dead ends: 5081 [2022-07-21 05:23:53,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 122 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-07-21 05:23:53,832 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 413 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:23:53,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [413 Valid, 909 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:23:53,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5081 states. [2022-07-21 05:23:54,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5081 to 4831. [2022-07-21 05:23:54,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4831 states, 4830 states have (on average 1.4140786749482401) internal successors, (6830), 4830 states have internal predecessors, (6830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:54,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4831 states to 4831 states and 6830 transitions. [2022-07-21 05:23:54,198 INFO L78 Accepts]: Start accepts. Automaton has 4831 states and 6830 transitions. Word has length 66 [2022-07-21 05:23:54,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:23:54,198 INFO L495 AbstractCegarLoop]: Abstraction has 4831 states and 6830 transitions. [2022-07-21 05:23:54,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.1) internal successors, (181), 10 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:54,198 INFO L276 IsEmpty]: Start isEmpty. Operand 4831 states and 6830 transitions. [2022-07-21 05:23:54,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-21 05:23:54,200 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:23:54,201 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:23:54,228 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-21 05:23:54,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:23:54,422 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:23:54,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:23:54,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1183086589, now seen corresponding path program 1 times [2022-07-21 05:23:54,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:23:54,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198439294] [2022-07-21 05:23:54,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:23:54,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:23:54,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:23:54,479 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:23:54,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:23:54,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198439294] [2022-07-21 05:23:54,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198439294] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:23:54,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:23:54,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 05:23:54,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809336806] [2022-07-21 05:23:54,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:23:54,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 05:23:54,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:23:54,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 05:23:54,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 05:23:54,481 INFO L87 Difference]: Start difference. First operand 4831 states and 6830 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:54,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:23:54,939 INFO L93 Difference]: Finished difference Result 11235 states and 15832 transitions. [2022-07-21 05:23:54,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 05:23:54,943 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 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 67 [2022-07-21 05:23:54,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:23:54,970 INFO L225 Difference]: With dead ends: 11235 [2022-07-21 05:23:54,971 INFO L226 Difference]: Without dead ends: 7825 [2022-07-21 05:23:54,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 05:23:54,977 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 49 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:23:54,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 199 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:23:54,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7825 states. [2022-07-21 05:23:55,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7825 to 7823. [2022-07-21 05:23:55,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7823 states, 7822 states have (on average 1.3891587829199694) internal successors, (10866), 7822 states have internal predecessors, (10866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:55,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7823 states to 7823 states and 10866 transitions. [2022-07-21 05:23:55,488 INFO L78 Accepts]: Start accepts. Automaton has 7823 states and 10866 transitions. Word has length 67 [2022-07-21 05:23:55,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:23:55,489 INFO L495 AbstractCegarLoop]: Abstraction has 7823 states and 10866 transitions. [2022-07-21 05:23:55,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:55,489 INFO L276 IsEmpty]: Start isEmpty. Operand 7823 states and 10866 transitions. [2022-07-21 05:23:55,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-21 05:23:55,492 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:23:55,492 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:23:55,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-21 05:23:55,492 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:23:55,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:23:55,493 INFO L85 PathProgramCache]: Analyzing trace with hash -297371507, now seen corresponding path program 1 times [2022-07-21 05:23:55,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:23:55,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423414784] [2022-07-21 05:23:55,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:23:55,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:23:55,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:23:55,537 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-21 05:23:55,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:23:55,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423414784] [2022-07-21 05:23:55,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423414784] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:23:55,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:23:55,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 05:23:55,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145637570] [2022-07-21 05:23:55,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:23:55,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 05:23:55,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:23:55,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 05:23:55,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 05:23:55,540 INFO L87 Difference]: Start difference. First operand 7823 states and 10866 transitions. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:56,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:23:56,189 INFO L93 Difference]: Finished difference Result 15327 states and 21392 transitions. [2022-07-21 05:23:56,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 05:23:56,190 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 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 67 [2022-07-21 05:23:56,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:23:56,225 INFO L225 Difference]: With dead ends: 15327 [2022-07-21 05:23:56,225 INFO L226 Difference]: Without dead ends: 11957 [2022-07-21 05:23:56,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-21 05:23:56,234 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 279 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:23:56,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 486 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:23:56,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11957 states. [2022-07-21 05:23:56,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11957 to 10593. [2022-07-21 05:23:56,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10593 states, 10592 states have (on average 1.3834969788519638) internal successors, (14654), 10592 states have internal predecessors, (14654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:56,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10593 states to 10593 states and 14654 transitions. [2022-07-21 05:23:56,957 INFO L78 Accepts]: Start accepts. Automaton has 10593 states and 14654 transitions. Word has length 67 [2022-07-21 05:23:56,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:23:56,957 INFO L495 AbstractCegarLoop]: Abstraction has 10593 states and 14654 transitions. [2022-07-21 05:23:56,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:56,958 INFO L276 IsEmpty]: Start isEmpty. Operand 10593 states and 14654 transitions. [2022-07-21 05:23:56,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-21 05:23:56,961 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:23:56,961 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:23:56,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-21 05:23:56,962 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:23:56,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:23:56,962 INFO L85 PathProgramCache]: Analyzing trace with hash 129974557, now seen corresponding path program 1 times [2022-07-21 05:23:56,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:23:56,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957021186] [2022-07-21 05:23:56,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:23:56,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:23:56,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:23:56,995 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:23:56,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:23:56,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957021186] [2022-07-21 05:23:56,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957021186] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:23:56,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:23:56,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 05:23:56,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075501581] [2022-07-21 05:23:56,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:23:56,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 05:23:56,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:23:56,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 05:23:56,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 05:23:56,998 INFO L87 Difference]: Start difference. First operand 10593 states and 14654 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:57,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:23:57,615 INFO L93 Difference]: Finished difference Result 18149 states and 24986 transitions. [2022-07-21 05:23:57,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 05:23:57,616 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 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 67 [2022-07-21 05:23:57,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:23:57,639 INFO L225 Difference]: With dead ends: 18149 [2022-07-21 05:23:57,639 INFO L226 Difference]: Without dead ends: 11113 [2022-07-21 05:23:57,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 05:23:57,651 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 52 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:23:57,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 231 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:23:57,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11113 states. [2022-07-21 05:23:58,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11113 to 10664. [2022-07-21 05:23:58,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10664 states, 10663 states have (on average 1.3522460845915782) internal successors, (14419), 10663 states have internal predecessors, (14419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:58,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10664 states to 10664 states and 14419 transitions. [2022-07-21 05:23:58,285 INFO L78 Accepts]: Start accepts. Automaton has 10664 states and 14419 transitions. Word has length 67 [2022-07-21 05:23:58,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:23:58,285 INFO L495 AbstractCegarLoop]: Abstraction has 10664 states and 14419 transitions. [2022-07-21 05:23:58,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:58,285 INFO L276 IsEmpty]: Start isEmpty. Operand 10664 states and 14419 transitions. [2022-07-21 05:23:58,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-21 05:23:58,292 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:23:58,293 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:23:58,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-21 05:23:58,293 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:23:58,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:23:58,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1562240835, now seen corresponding path program 1 times [2022-07-21 05:23:58,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:23:58,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696790214] [2022-07-21 05:23:58,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:23:58,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:23:58,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:23:58,384 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-21 05:23:58,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:23:58,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696790214] [2022-07-21 05:23:58,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696790214] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:23:58,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:23:58,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 05:23:58,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482379208] [2022-07-21 05:23:58,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:23:58,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 05:23:58,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:23:58,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 05:23:58,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 05:23:58,387 INFO L87 Difference]: Start difference. First operand 10664 states and 14419 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:59,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:23:59,174 INFO L93 Difference]: Finished difference Result 15411 states and 21048 transitions. [2022-07-21 05:23:59,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 05:23:59,175 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 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 67 [2022-07-21 05:23:59,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:23:59,205 INFO L225 Difference]: With dead ends: 15411 [2022-07-21 05:23:59,205 INFO L226 Difference]: Without dead ends: 13669 [2022-07-21 05:23:59,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-21 05:23:59,216 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 286 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:23:59,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 482 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:23:59,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13669 states. [2022-07-21 05:23:59,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13669 to 12284. [2022-07-21 05:23:59,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12284 states, 12283 states have (on average 1.3543108361149556) internal successors, (16635), 12283 states have internal predecessors, (16635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:59,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12284 states to 12284 states and 16635 transitions. [2022-07-21 05:23:59,887 INFO L78 Accepts]: Start accepts. Automaton has 12284 states and 16635 transitions. Word has length 67 [2022-07-21 05:23:59,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:23:59,888 INFO L495 AbstractCegarLoop]: Abstraction has 12284 states and 16635 transitions. [2022-07-21 05:23:59,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:23:59,888 INFO L276 IsEmpty]: Start isEmpty. Operand 12284 states and 16635 transitions. [2022-07-21 05:23:59,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-21 05:23:59,891 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:23:59,891 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:23:59,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-21 05:23:59,892 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:23:59,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:23:59,892 INFO L85 PathProgramCache]: Analyzing trace with hash -2062316443, now seen corresponding path program 1 times [2022-07-21 05:23:59,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:23:59,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089064424] [2022-07-21 05:23:59,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:23:59,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:23:59,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:23:59,932 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-21 05:23:59,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:23:59,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089064424] [2022-07-21 05:23:59,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089064424] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:23:59,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:23:59,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 05:23:59,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995812251] [2022-07-21 05:23:59,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:23:59,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 05:23:59,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:23:59,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 05:23:59,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-21 05:23:59,934 INFO L87 Difference]: Start difference. First operand 12284 states and 16635 transitions. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:24:00,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:24:00,577 INFO L93 Difference]: Finished difference Result 19196 states and 26179 transitions. [2022-07-21 05:24:00,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-21 05:24:00,578 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 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 67 [2022-07-21 05:24:00,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:24:00,614 INFO L225 Difference]: With dead ends: 19196 [2022-07-21 05:24:00,615 INFO L226 Difference]: Without dead ends: 16092 [2022-07-21 05:24:00,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-21 05:24:00,623 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 281 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 05:24:00,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 500 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 05:24:00,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16092 states. [2022-07-21 05:24:01,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16092 to 14696. [2022-07-21 05:24:01,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14696 states, 14695 states have (on average 1.350187138482477) internal successors, (19841), 14695 states have internal predecessors, (19841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:24:01,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14696 states to 14696 states and 19841 transitions. [2022-07-21 05:24:01,319 INFO L78 Accepts]: Start accepts. Automaton has 14696 states and 19841 transitions. Word has length 67 [2022-07-21 05:24:01,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:24:01,320 INFO L495 AbstractCegarLoop]: Abstraction has 14696 states and 19841 transitions. [2022-07-21 05:24:01,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:24:01,320 INFO L276 IsEmpty]: Start isEmpty. Operand 14696 states and 19841 transitions. [2022-07-21 05:24:01,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-21 05:24:01,323 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:24:01,323 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:24:01,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-21 05:24:01,324 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:24:01,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:24:01,324 INFO L85 PathProgramCache]: Analyzing trace with hash -762122981, now seen corresponding path program 1 times [2022-07-21 05:24:01,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:24:01,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763560350] [2022-07-21 05:24:01,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:24:01,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:24:01,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:24:01,349 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:24:01,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:24:01,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763560350] [2022-07-21 05:24:01,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763560350] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:24:01,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:24:01,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-21 05:24:01,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661305350] [2022-07-21 05:24:01,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:24:01,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 05:24:01,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:24:01,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 05:24:01,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 05:24:01,351 INFO L87 Difference]: Start difference. First operand 14696 states and 19841 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:24:02,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:24:02,241 INFO L93 Difference]: Finished difference Result 35614 states and 47892 transitions. [2022-07-21 05:24:02,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 05:24:02,241 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 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 70 [2022-07-21 05:24:02,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:24:02,278 INFO L225 Difference]: With dead ends: 35614 [2022-07-21 05:24:02,278 INFO L226 Difference]: Without dead ends: 21860 [2022-07-21 05:24:02,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-21 05:24:02,300 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 50 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:24:02,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 246 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:24:02,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21860 states. [2022-07-21 05:24:03,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21860 to 21198. [2022-07-21 05:24:03,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21198 states, 21197 states have (on average 1.3274519979242345) internal successors, (28138), 21197 states have internal predecessors, (28138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:24:03,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21198 states to 21198 states and 28138 transitions. [2022-07-21 05:24:03,585 INFO L78 Accepts]: Start accepts. Automaton has 21198 states and 28138 transitions. Word has length 70 [2022-07-21 05:24:03,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:24:03,585 INFO L495 AbstractCegarLoop]: Abstraction has 21198 states and 28138 transitions. [2022-07-21 05:24:03,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:24:03,585 INFO L276 IsEmpty]: Start isEmpty. Operand 21198 states and 28138 transitions. [2022-07-21 05:24:03,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-21 05:24:03,591 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:24:03,592 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:24:03,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-21 05:24:03,592 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:24:03,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:24:03,593 INFO L85 PathProgramCache]: Analyzing trace with hash -624325544, now seen corresponding path program 1 times [2022-07-21 05:24:03,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:24:03,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738468650] [2022-07-21 05:24:03,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:24:03,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:24:03,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:24:03,672 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:24:03,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:24:03,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738468650] [2022-07-21 05:24:03,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738468650] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:24:03,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070520928] [2022-07-21 05:24:03,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:24:03,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:24:03,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:24:03,675 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:24:03,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 05:24:03,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:24:03,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 05:24:03,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:24:03,959 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:24:03,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:24:04,042 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:24:04,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070520928] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:24:04,043 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:24:04,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-07-21 05:24:04,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657061150] [2022-07-21 05:24:04,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:24:04,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 05:24:04,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:24:04,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 05:24:04,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-07-21 05:24:04,045 INFO L87 Difference]: Start difference. First operand 21198 states and 28138 transitions. Second operand has 11 states, 11 states have (on average 10.909090909090908) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:24:06,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:24:06,617 INFO L93 Difference]: Finished difference Result 64966 states and 86142 transitions. [2022-07-21 05:24:06,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 05:24:06,618 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 10.909090909090908) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 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 71 [2022-07-21 05:24:06,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:24:06,707 INFO L225 Difference]: With dead ends: 64966 [2022-07-21 05:24:06,707 INFO L226 Difference]: Without dead ends: 47852 [2022-07-21 05:24:06,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2022-07-21 05:24:06,744 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 1393 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1393 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-21 05:24:06,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1393 Valid, 369 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-21 05:24:06,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47852 states. [2022-07-21 05:24:08,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47852 to 24863. [2022-07-21 05:24:08,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24863 states, 24862 states have (on average 1.3303837181240448) internal successors, (33076), 24862 states have internal predecessors, (33076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:24:08,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24863 states to 24863 states and 33076 transitions. [2022-07-21 05:24:08,274 INFO L78 Accepts]: Start accepts. Automaton has 24863 states and 33076 transitions. Word has length 71 [2022-07-21 05:24:08,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:24:08,274 INFO L495 AbstractCegarLoop]: Abstraction has 24863 states and 33076 transitions. [2022-07-21 05:24:08,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.909090909090908) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:24:08,275 INFO L276 IsEmpty]: Start isEmpty. Operand 24863 states and 33076 transitions. [2022-07-21 05:24:08,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-21 05:24:08,279 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:24:08,279 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:24:08,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 05:24:08,503 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,SelfDestructingSolverStorable15 [2022-07-21 05:24:08,503 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:24:08,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:24:08,504 INFO L85 PathProgramCache]: Analyzing trace with hash -2058940762, now seen corresponding path program 1 times [2022-07-21 05:24:08,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:24:08,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253276945] [2022-07-21 05:24:08,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:24:08,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:24:08,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:24:08,552 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-21 05:24:08,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:24:08,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253276945] [2022-07-21 05:24:08,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253276945] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:24:08,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:24:08,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 05:24:08,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587266729] [2022-07-21 05:24:08,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:24:08,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 05:24:08,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:24:08,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 05:24:08,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-21 05:24:08,555 INFO L87 Difference]: Start difference. First operand 24863 states and 33076 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:24:11,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:24:11,701 INFO L93 Difference]: Finished difference Result 72841 states and 97019 transitions. [2022-07-21 05:24:11,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 05:24:11,701 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 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 71 [2022-07-21 05:24:11,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:24:11,768 INFO L225 Difference]: With dead ends: 72841 [2022-07-21 05:24:11,768 INFO L226 Difference]: Without dead ends: 48017 [2022-07-21 05:24:11,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-21 05:24:11,797 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 535 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 05:24:11,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [535 Valid, 206 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 05:24:11,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48017 states. [2022-07-21 05:24:14,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48017 to 43207. [2022-07-21 05:24:14,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43207 states, 43206 states have (on average 1.3185668657130953) internal successors, (56970), 43206 states have internal predecessors, (56970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:24:14,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43207 states to 43207 states and 56970 transitions. [2022-07-21 05:24:14,226 INFO L78 Accepts]: Start accepts. Automaton has 43207 states and 56970 transitions. Word has length 71 [2022-07-21 05:24:14,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:24:14,227 INFO L495 AbstractCegarLoop]: Abstraction has 43207 states and 56970 transitions. [2022-07-21 05:24:14,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:24:14,227 INFO L276 IsEmpty]: Start isEmpty. Operand 43207 states and 56970 transitions. [2022-07-21 05:24:14,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-21 05:24:14,232 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:24:14,233 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:24:14,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-21 05:24:14,233 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:24:14,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:24:14,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1342540196, now seen corresponding path program 1 times [2022-07-21 05:24:14,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:24:14,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90434058] [2022-07-21 05:24:14,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:24:14,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:24:14,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:24:14,287 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:24:14,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:24:14,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90434058] [2022-07-21 05:24:14,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90434058] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:24:14,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033570825] [2022-07-21 05:24:14,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:24:14,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:24:14,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:24:14,289 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:24:14,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 05:24:14,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:24:14,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 05:24:14,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:24:14,523 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:24:14,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:24:14,590 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:24:14,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033570825] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:24:14,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:24:14,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-07-21 05:24:14,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902075921] [2022-07-21 05:24:14,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:24:14,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 05:24:14,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:24:14,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 05:24:14,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-07-21 05:24:14,593 INFO L87 Difference]: Start difference. First operand 43207 states and 56970 transitions. Second operand has 11 states, 11 states have (on average 10.909090909090908) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:24:18,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:24:18,578 INFO L93 Difference]: Finished difference Result 94596 states and 123749 transitions. [2022-07-21 05:24:18,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 05:24:18,579 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 10.909090909090908) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 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 71 [2022-07-21 05:24:18,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:24:18,666 INFO L225 Difference]: With dead ends: 94596 [2022-07-21 05:24:18,666 INFO L226 Difference]: Without dead ends: 60750 [2022-07-21 05:24:18,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2022-07-21 05:24:18,706 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 1441 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1441 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-21 05:24:18,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1441 Valid, 281 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-21 05:24:18,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60750 states. [2022-07-21 05:24:21,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60750 to 43900. [2022-07-21 05:24:21,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43900 states, 43899 states have (on average 1.3105537711565183) internal successors, (57532), 43899 states have internal predecessors, (57532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:24:21,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43900 states to 43900 states and 57532 transitions. [2022-07-21 05:24:21,955 INFO L78 Accepts]: Start accepts. Automaton has 43900 states and 57532 transitions. Word has length 71 [2022-07-21 05:24:21,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:24:21,955 INFO L495 AbstractCegarLoop]: Abstraction has 43900 states and 57532 transitions. [2022-07-21 05:24:21,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.909090909090908) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:24:21,955 INFO L276 IsEmpty]: Start isEmpty. Operand 43900 states and 57532 transitions. [2022-07-21 05:24:21,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-21 05:24:21,961 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:24:21,961 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:24:21,983 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-21 05:24:22,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-21 05:24:22,175 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:24:22,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:24:22,176 INFO L85 PathProgramCache]: Analyzing trace with hash -85511602, now seen corresponding path program 1 times [2022-07-21 05:24:22,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:24:22,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571613452] [2022-07-21 05:24:22,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:24:22,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:24:22,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:24:22,229 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:24:22,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:24:22,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571613452] [2022-07-21 05:24:22,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571613452] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:24:22,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904162938] [2022-07-21 05:24:22,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:24:22,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:24:22,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:24:22,233 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:24:22,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 05:24:22,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:24:22,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-21 05:24:22,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:24:22,515 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:24:22,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-21 05:24:22,604 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:24:22,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904162938] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-21 05:24:22,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-21 05:24:22,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-07-21 05:24:22,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642825565] [2022-07-21 05:24:22,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-21 05:24:22,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-21 05:24:22,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:24:22,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-21 05:24:22,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-07-21 05:24:22,608 INFO L87 Difference]: Start difference. First operand 43900 states and 57532 transitions. Second operand has 11 states, 11 states have (on average 11.181818181818182) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-21 05:24:28,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:24:28,823 INFO L93 Difference]: Finished difference Result 115764 states and 151284 transitions. [2022-07-21 05:24:28,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-21 05:24:28,824 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 11.181818181818182) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 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 71 [2022-07-21 05:24:28,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:24:28,934 INFO L225 Difference]: With dead ends: 115764 [2022-07-21 05:24:28,934 INFO L226 Difference]: Without dead ends: 87206 [2022-07-21 05:24:28,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2022-07-21 05:24:28,966 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 1209 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1209 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-21 05:24:28,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1209 Valid, 361 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-21 05:24:29,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87206 states.