./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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.4.ufo.UNBOUNDED.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 aba75d5c6112bb80051134ed7f98fd80207b53da5b894be601f1f010079e2e6e --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 11:49:53,823 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 11:49:53,826 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 11:49:53,893 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 11:49:53,893 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 11:49:53,896 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 11:49:53,898 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 11:49:53,904 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 11:49:53,906 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 11:49:53,912 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 11:49:53,913 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 11:49:53,914 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 11:49:53,915 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 11:49:53,917 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 11:49:53,919 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 11:49:53,923 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 11:49:53,924 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 11:49:53,925 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 11:49:53,926 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 11:49:53,930 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 11:49:53,933 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 11:49:53,934 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 11:49:53,935 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 11:49:53,936 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 11:49:53,941 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 11:49:53,945 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 11:49:53,945 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 11:49:53,946 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 11:49:53,948 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 11:49:53,948 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 11:49:53,949 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 11:49:53,949 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 11:49:53,950 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 11:49:53,951 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 11:49:53,953 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 11:49:53,954 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 11:49:53,954 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 11:49:53,954 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 11:49:53,955 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 11:49:53,955 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 11:49:53,956 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 11:49:53,957 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 11:49:53,978 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 11:49:53,978 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 11:49:53,978 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 11:49:53,979 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 11:49:53,979 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 11:49:53,980 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 11:49:53,980 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 11:49:53,980 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 11:49:53,980 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 11:49:53,981 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 11:49:53,981 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 11:49:53,981 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 11:49:53,981 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 11:49:53,981 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 11:49:53,982 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 11:49:53,982 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 11:49:53,982 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 11:49:53,982 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 11:49:53,982 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 11:49:53,983 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 11:49:53,983 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 11:49:53,983 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 11:49:53,983 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 11:49:53,983 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 11:49:53,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 11:49:53,984 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 11:49:53,984 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 11:49:53,984 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 11:49:53,984 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 11:49:53,985 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 11:49:53,985 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 11:49:53,985 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 11:49:53,985 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 11:49:53,985 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 11:49:53,986 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aba75d5c6112bb80051134ed7f98fd80207b53da5b894be601f1f010079e2e6e [2021-12-22 11:49:54,205 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 11:49:54,222 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 11:49:54,225 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 11:49:54,226 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 11:49:54,226 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 11:49:54,228 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c [2021-12-22 11:49:54,295 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/314dde344/1546ac9b7dda441bb542dac5f407086f/FLAG5957d692a [2021-12-22 11:49:54,668 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 11:49:54,668 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c [2021-12-22 11:49:54,675 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/314dde344/1546ac9b7dda441bb542dac5f407086f/FLAG5957d692a [2021-12-22 11:49:54,688 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/314dde344/1546ac9b7dda441bb542dac5f407086f [2021-12-22 11:49:54,690 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 11:49:54,691 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 11:49:54,693 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 11:49:54,693 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 11:49:54,696 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 11:49:54,696 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:49:54" (1/1) ... [2021-12-22 11:49:54,697 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6aa8cd35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:49:54, skipping insertion in model container [2021-12-22 11:49:54,698 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:49:54" (1/1) ... [2021-12-22 11:49:54,704 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 11:49:54,731 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 11:49:54,922 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.4.ufo.UNBOUNDED.pals.c[9488,9501] [2021-12-22 11:49:54,924 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 11:49:54,931 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 11:49:54,967 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.4.ufo.UNBOUNDED.pals.c[9488,9501] [2021-12-22 11:49:54,968 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 11:49:54,980 INFO L208 MainTranslator]: Completed translation [2021-12-22 11:49:54,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:49:54 WrapperNode [2021-12-22 11:49:54,981 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 11:49:54,982 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 11:49:54,983 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 11:49:54,983 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 11:49:54,989 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:49:54" (1/1) ... [2021-12-22 11:49:54,997 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:49:54" (1/1) ... [2021-12-22 11:49:55,034 INFO L137 Inliner]: procedures = 24, calls = 15, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 319 [2021-12-22 11:49:55,036 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 11:49:55,037 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 11:49:55,037 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 11:49:55,037 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 11:49:55,044 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:49:54" (1/1) ... [2021-12-22 11:49:55,044 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:49:54" (1/1) ... [2021-12-22 11:49:55,057 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:49:54" (1/1) ... [2021-12-22 11:49:55,059 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:49:54" (1/1) ... [2021-12-22 11:49:55,064 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:49:54" (1/1) ... [2021-12-22 11:49:55,083 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:49:54" (1/1) ... [2021-12-22 11:49:55,085 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:49:54" (1/1) ... [2021-12-22 11:49:55,092 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 11:49:55,093 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 11:49:55,093 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 11:49:55,096 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 11:49:55,097 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:49:54" (1/1) ... [2021-12-22 11:49:55,103 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 11:49:55,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:49:55,128 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) [2021-12-22 11:49:55,154 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 [2021-12-22 11:49:55,168 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 11:49:55,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 11:49:55,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 11:49:55,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 11:49:55,240 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 11:49:55,241 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 11:49:55,579 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 11:49:55,592 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 11:49:55,592 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-22 11:49:55,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:49:55 BoogieIcfgContainer [2021-12-22 11:49:55,594 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 11:49:55,595 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 11:49:55,595 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 11:49:55,602 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 11:49:55,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 11:49:54" (1/3) ... [2021-12-22 11:49:55,604 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12360ddc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:49:55, skipping insertion in model container [2021-12-22 11:49:55,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:49:54" (2/3) ... [2021-12-22 11:49:55,605 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12360ddc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:49:55, skipping insertion in model container [2021-12-22 11:49:55,605 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:49:55" (3/3) ... [2021-12-22 11:49:55,606 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.ufo.UNBOUNDED.pals.c [2021-12-22 11:49:55,611 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 11:49:55,611 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 11:49:55,656 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 11:49:55,662 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 11:49:55,663 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 11:49:55,683 INFO L276 IsEmpty]: Start isEmpty. Operand has 102 states, 100 states have (on average 1.69) internal successors, (169), 101 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:55,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-22 11:49:55,688 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:49:55,689 INFO L514 BasicCegarLoop]: 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] [2021-12-22 11:49:55,689 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:49:55,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:49:55,694 INFO L85 PathProgramCache]: Analyzing trace with hash 773042370, now seen corresponding path program 1 times [2021-12-22 11:49:55,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:49:55,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951809952] [2021-12-22 11:49:55,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:49:55,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:49:55,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:49:55,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:49:55,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:49:55,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951809952] [2021-12-22 11:49:55,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951809952] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:49:55,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:49:55,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 11:49:55,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266391038] [2021-12-22 11:49:55,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:49:55,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 11:49:55,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:49:55,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 11:49:55,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 11:49:55,890 INFO L87 Difference]: Start difference. First operand has 102 states, 100 states have (on average 1.69) internal successors, (169), 101 states have internal predecessors, (169), 0 states have call successors, (0), 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 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:55,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:49:55,918 INFO L93 Difference]: Finished difference Result 171 states and 281 transitions. [2021-12-22 11:49:55,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 11:49:55,920 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 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 30 [2021-12-22 11:49:55,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:49:55,927 INFO L225 Difference]: With dead ends: 171 [2021-12-22 11:49:55,928 INFO L226 Difference]: Without dead ends: 98 [2021-12-22 11:49:55,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 11:49:55,934 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:49:55,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:49:55,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-22 11:49:55,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-12-22 11:49:55,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.6701030927835052) internal successors, (162), 97 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:55,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 162 transitions. [2021-12-22 11:49:55,976 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 162 transitions. Word has length 30 [2021-12-22 11:49:55,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:49:55,977 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 162 transitions. [2021-12-22 11:49:55,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 15.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:55,977 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 162 transitions. [2021-12-22 11:49:55,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-22 11:49:55,978 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:49:55,979 INFO L514 BasicCegarLoop]: 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] [2021-12-22 11:49:55,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 11:49:55,979 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:49:55,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:49:55,983 INFO L85 PathProgramCache]: Analyzing trace with hash 913590980, now seen corresponding path program 1 times [2021-12-22 11:49:55,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:49:55,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219748714] [2021-12-22 11:49:55,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:49:55,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:49:56,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:49:56,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:49:56,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:49:56,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219748714] [2021-12-22 11:49:56,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219748714] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:49:56,126 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:49:56,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:49:56,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370603513] [2021-12-22 11:49:56,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:49:56,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:49:56,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:49:56,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:49:56,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:49:56,131 INFO L87 Difference]: Start difference. First operand 98 states and 162 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:56,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:49:56,222 INFO L93 Difference]: Finished difference Result 170 states and 274 transitions. [2021-12-22 11:49:56,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 11:49:56,223 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 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 30 [2021-12-22 11:49:56,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:49:56,227 INFO L225 Difference]: With dead ends: 170 [2021-12-22 11:49:56,227 INFO L226 Difference]: Without dead ends: 98 [2021-12-22 11:49:56,229 INFO L932 BasicCegarLoop]: 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 [2021-12-22 11:49:56,231 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 3 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:49:56,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 613 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:49:56,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-22 11:49:56,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-12-22 11:49:56,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.422680412371134) internal successors, (138), 97 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:56,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 138 transitions. [2021-12-22 11:49:56,248 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 138 transitions. Word has length 30 [2021-12-22 11:49:56,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:49:56,249 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 138 transitions. [2021-12-22 11:49:56,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:56,250 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 138 transitions. [2021-12-22 11:49:56,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-22 11:49:56,252 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:49:56,252 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:49:56,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 11:49:56,253 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:49:56,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:49:56,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1508952555, now seen corresponding path program 1 times [2021-12-22 11:49:56,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:49:56,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009086269] [2021-12-22 11:49:56,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:49:56,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:49:56,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:49:56,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:49:56,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:49:56,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009086269] [2021-12-22 11:49:56,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009086269] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:49:56,382 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:49:56,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:49:56,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104554503] [2021-12-22 11:49:56,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:49:56,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:49:56,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:49:56,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:49:56,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:49:56,385 INFO L87 Difference]: Start difference. First operand 98 states and 138 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:56,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:49:56,417 INFO L93 Difference]: Finished difference Result 222 states and 334 transitions. [2021-12-22 11:49:56,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:49:56,418 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 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 53 [2021-12-22 11:49:56,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:49:56,421 INFO L225 Difference]: With dead ends: 222 [2021-12-22 11:49:56,422 INFO L226 Difference]: Without dead ends: 154 [2021-12-22 11:49:56,423 INFO L932 BasicCegarLoop]: 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 [2021-12-22 11:49:56,424 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 91 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 299 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 [2021-12-22 11:49:56,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 299 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:49:56,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-12-22 11:49:56,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 152. [2021-12-22 11:49:56,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.4834437086092715) internal successors, (224), 151 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:56,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 224 transitions. [2021-12-22 11:49:56,444 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 224 transitions. Word has length 53 [2021-12-22 11:49:56,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:49:56,445 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 224 transitions. [2021-12-22 11:49:56,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:56,445 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 224 transitions. [2021-12-22 11:49:56,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-22 11:49:56,451 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:49:56,451 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:49:56,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 11:49:56,452 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:49:56,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:49:56,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1759991574, now seen corresponding path program 1 times [2021-12-22 11:49:56,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:49:56,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007706891] [2021-12-22 11:49:56,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:49:56,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:49:56,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:49:56,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:49:56,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:49:56,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007706891] [2021-12-22 11:49:56,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007706891] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:49:56,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:49:56,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:49:56,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597605090] [2021-12-22 11:49:56,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:49:56,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:49:56,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:49:56,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:49:56,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:49:56,552 INFO L87 Difference]: Start difference. First operand 152 states and 224 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:56,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:49:56,585 INFO L93 Difference]: Finished difference Result 372 states and 572 transitions. [2021-12-22 11:49:56,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:49:56,585 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 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 54 [2021-12-22 11:49:56,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:49:56,587 INFO L225 Difference]: With dead ends: 372 [2021-12-22 11:49:56,589 INFO L226 Difference]: Without dead ends: 250 [2021-12-22 11:49:56,591 INFO L932 BasicCegarLoop]: 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 [2021-12-22 11:49:56,593 INFO L933 BasicCegarLoop]: 183 mSDtfsCounter, 86 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 290 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 [2021-12-22 11:49:56,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 290 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:49:56,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-12-22 11:49:56,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 248. [2021-12-22 11:49:56,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.5182186234817814) internal successors, (375), 247 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:56,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 375 transitions. [2021-12-22 11:49:56,608 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 375 transitions. Word has length 54 [2021-12-22 11:49:56,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:49:56,609 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 375 transitions. [2021-12-22 11:49:56,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:56,609 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 375 transitions. [2021-12-22 11:49:56,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-22 11:49:56,610 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:49:56,610 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:49:56,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 11:49:56,611 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:49:56,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:49:56,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1078196827, now seen corresponding path program 1 times [2021-12-22 11:49:56,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:49:56,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866696996] [2021-12-22 11:49:56,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:49:56,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:49:56,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:49:56,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:49:56,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:49:56,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866696996] [2021-12-22 11:49:56,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866696996] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:49:56,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:49:56,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:49:56,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251844823] [2021-12-22 11:49:56,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:49:56,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:49:56,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:49:56,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:49:56,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:49:56,692 INFO L87 Difference]: Start difference. First operand 248 states and 375 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:56,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:49:56,729 INFO L93 Difference]: Finished difference Result 636 states and 985 transitions. [2021-12-22 11:49:56,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:49:56,730 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-12-22 11:49:56,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:49:56,732 INFO L225 Difference]: With dead ends: 636 [2021-12-22 11:49:56,732 INFO L226 Difference]: Without dead ends: 418 [2021-12-22 11:49:56,735 INFO L932 BasicCegarLoop]: 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 [2021-12-22 11:49:56,736 INFO L933 BasicCegarLoop]: 170 mSDtfsCounter, 81 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 281 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 [2021-12-22 11:49:56,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 281 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:49:56,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-12-22 11:49:56,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 416. [2021-12-22 11:49:56,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 1.5301204819277108) internal successors, (635), 415 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:56,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 635 transitions. [2021-12-22 11:49:56,783 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 635 transitions. Word has length 55 [2021-12-22 11:49:56,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:49:56,786 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 635 transitions. [2021-12-22 11:49:56,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:56,786 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 635 transitions. [2021-12-22 11:49:56,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-22 11:49:56,787 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:49:56,788 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:49:56,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 11:49:56,789 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:49:56,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:49:56,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1363611750, now seen corresponding path program 1 times [2021-12-22 11:49:56,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:49:56,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114836471] [2021-12-22 11:49:56,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:49:56,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:49:56,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:49:56,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:49:56,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:49:56,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114836471] [2021-12-22 11:49:56,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114836471] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:49:56,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:49:56,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 11:49:56,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252633323] [2021-12-22 11:49:56,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:49:56,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 11:49:56,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:49:56,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 11:49:56,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:49:56,885 INFO L87 Difference]: Start difference. First operand 416 states and 635 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:57,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:49:57,041 INFO L93 Difference]: Finished difference Result 2346 states and 3660 transitions. [2021-12-22 11:49:57,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 11:49:57,042 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 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 56 [2021-12-22 11:49:57,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:49:57,053 INFO L225 Difference]: With dead ends: 2346 [2021-12-22 11:49:57,053 INFO L226 Difference]: Without dead ends: 1960 [2021-12-22 11:49:57,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-22 11:49:57,056 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 780 mSDsluCounter, 1016 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 1152 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 11:49:57,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [780 Valid, 1152 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 11:49:57,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1960 states. [2021-12-22 11:49:57,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1960 to 800. [2021-12-22 11:49:57,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 1.5306633291614518) internal successors, (1223), 799 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:57,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1223 transitions. [2021-12-22 11:49:57,133 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1223 transitions. Word has length 56 [2021-12-22 11:49:57,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:49:57,133 INFO L470 AbstractCegarLoop]: Abstraction has 800 states and 1223 transitions. [2021-12-22 11:49:57,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 6 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:57,134 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1223 transitions. [2021-12-22 11:49:57,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-22 11:49:57,134 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:49:57,134 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:49:57,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 11:49:57,135 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:49:57,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:49:57,135 INFO L85 PathProgramCache]: Analyzing trace with hash 294385397, now seen corresponding path program 1 times [2021-12-22 11:49:57,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:49:57,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738548422] [2021-12-22 11:49:57,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:49:57,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:49:57,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:49:57,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:49:57,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:49:57,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738548422] [2021-12-22 11:49:57,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738548422] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:49:57,278 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:49:57,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 11:49:57,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589425787] [2021-12-22 11:49:57,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:49:57,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 11:49:57,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:49:57,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 11:49:57,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:49:57,280 INFO L87 Difference]: Start difference. First operand 800 states and 1223 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:57,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:49:57,536 INFO L93 Difference]: Finished difference Result 3568 states and 5459 transitions. [2021-12-22 11:49:57,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 11:49:57,539 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-12-22 11:49:57,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:49:57,549 INFO L225 Difference]: With dead ends: 3568 [2021-12-22 11:49:57,549 INFO L226 Difference]: Without dead ends: 2798 [2021-12-22 11:49:57,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:49:57,554 INFO L933 BasicCegarLoop]: 315 mSDtfsCounter, 356 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 11:49:57,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 652 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 11:49:57,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2798 states. [2021-12-22 11:49:57,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2798 to 2792. [2021-12-22 11:49:57,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2792 states, 2791 states have (on average 1.5216768183446794) internal successors, (4247), 2791 states have internal predecessors, (4247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:57,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2792 states to 2792 states and 4247 transitions. [2021-12-22 11:49:57,739 INFO L78 Accepts]: Start accepts. Automaton has 2792 states and 4247 transitions. Word has length 57 [2021-12-22 11:49:57,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:49:57,739 INFO L470 AbstractCegarLoop]: Abstraction has 2792 states and 4247 transitions. [2021-12-22 11:49:57,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:57,740 INFO L276 IsEmpty]: Start isEmpty. Operand 2792 states and 4247 transitions. [2021-12-22 11:49:57,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-22 11:49:57,741 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:49:57,742 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:49:57,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 11:49:57,742 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:49:57,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:49:57,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1296866655, now seen corresponding path program 1 times [2021-12-22 11:49:57,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:49:57,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058149967] [2021-12-22 11:49:57,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:49:57,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:49:57,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:49:57,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:49:57,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:49:57,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058149967] [2021-12-22 11:49:57,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058149967] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:49:57,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:49:57,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:49:57,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209750971] [2021-12-22 11:49:57,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:49:57,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:49:57,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:49:57,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:49:57,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:49:57,810 INFO L87 Difference]: Start difference. First operand 2792 states and 4247 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:58,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:49:58,114 INFO L93 Difference]: Finished difference Result 7468 states and 11289 transitions. [2021-12-22 11:49:58,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:49:58,115 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 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 58 [2021-12-22 11:49:58,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:49:58,134 INFO L225 Difference]: With dead ends: 7468 [2021-12-22 11:49:58,134 INFO L226 Difference]: Without dead ends: 4706 [2021-12-22 11:49:58,138 INFO L932 BasicCegarLoop]: 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 [2021-12-22 11:49:58,140 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 93 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 318 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 [2021-12-22 11:49:58,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 318 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:49:58,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4706 states. [2021-12-22 11:49:58,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4706 to 4704. [2021-12-22 11:49:58,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4704 states, 4703 states have (on average 1.489900063789071) internal successors, (7007), 4703 states have internal predecessors, (7007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:58,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4704 states to 4704 states and 7007 transitions. [2021-12-22 11:49:58,448 INFO L78 Accepts]: Start accepts. Automaton has 4704 states and 7007 transitions. Word has length 58 [2021-12-22 11:49:58,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:49:58,449 INFO L470 AbstractCegarLoop]: Abstraction has 4704 states and 7007 transitions. [2021-12-22 11:49:58,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:58,449 INFO L276 IsEmpty]: Start isEmpty. Operand 4704 states and 7007 transitions. [2021-12-22 11:49:58,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-22 11:49:58,450 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:49:58,451 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:49:58,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 11:49:58,453 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:49:58,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:49:58,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1866607497, now seen corresponding path program 1 times [2021-12-22 11:49:58,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:49:58,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145261533] [2021-12-22 11:49:58,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:49:58,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:49:58,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:49:58,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:49:58,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:49:58,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145261533] [2021-12-22 11:49:58,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145261533] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:49:58,547 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:49:58,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 11:49:58,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858783728] [2021-12-22 11:49:58,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:49:58,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 11:49:58,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:49:58,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 11:49:58,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-22 11:49:58,549 INFO L87 Difference]: Start difference. First operand 4704 states and 7007 transitions. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:59,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:49:59,239 INFO L93 Difference]: Finished difference Result 9890 states and 14496 transitions. [2021-12-22 11:49:59,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 11:49:59,240 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 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 58 [2021-12-22 11:49:59,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:49:59,274 INFO L225 Difference]: With dead ends: 9890 [2021-12-22 11:49:59,275 INFO L226 Difference]: Without dead ends: 9888 [2021-12-22 11:49:59,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-12-22 11:49:59,280 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 783 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:49:59,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [783 Valid, 663 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:49:59,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9888 states. [2021-12-22 11:49:59,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9888 to 5088. [2021-12-22 11:49:59,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5088 states, 5087 states have (on average 1.4529192058187537) internal successors, (7391), 5087 states have internal predecessors, (7391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:59,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5088 states to 5088 states and 7391 transitions. [2021-12-22 11:49:59,723 INFO L78 Accepts]: Start accepts. Automaton has 5088 states and 7391 transitions. Word has length 58 [2021-12-22 11:49:59,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:49:59,723 INFO L470 AbstractCegarLoop]: Abstraction has 5088 states and 7391 transitions. [2021-12-22 11:49:59,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:49:59,723 INFO L276 IsEmpty]: Start isEmpty. Operand 5088 states and 7391 transitions. [2021-12-22 11:49:59,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-22 11:49:59,724 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:49:59,724 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:49:59,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 11:49:59,725 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:49:59,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:49:59,726 INFO L85 PathProgramCache]: Analyzing trace with hash 2082836158, now seen corresponding path program 1 times [2021-12-22 11:49:59,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:49:59,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75477571] [2021-12-22 11:49:59,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:49:59,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:49:59,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:49:59,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:49:59,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:49:59,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75477571] [2021-12-22 11:49:59,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75477571] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:49:59,758 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:49:59,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:49:59,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566409787] [2021-12-22 11:49:59,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:49:59,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:49:59,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:49:59,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:49:59,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:49:59,759 INFO L87 Difference]: Start difference. First operand 5088 states and 7391 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:00,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:50:00,271 INFO L93 Difference]: Finished difference Result 12334 states and 17947 transitions. [2021-12-22 11:50:00,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:50:00,271 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 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 59 [2021-12-22 11:50:00,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:50:00,292 INFO L225 Difference]: With dead ends: 12334 [2021-12-22 11:50:00,292 INFO L226 Difference]: Without dead ends: 7276 [2021-12-22 11:50:00,298 INFO L932 BasicCegarLoop]: 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 [2021-12-22 11:50:00,299 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 71 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:50:00,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 240 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:50:00,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7276 states. [2021-12-22 11:50:00,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7276 to 7218. [2021-12-22 11:50:00,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7218 states, 7217 states have (on average 1.4433975336012193) internal successors, (10417), 7217 states have internal predecessors, (10417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:00,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7218 states to 7218 states and 10417 transitions. [2021-12-22 11:50:00,763 INFO L78 Accepts]: Start accepts. Automaton has 7218 states and 10417 transitions. Word has length 59 [2021-12-22 11:50:00,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:50:00,763 INFO L470 AbstractCegarLoop]: Abstraction has 7218 states and 10417 transitions. [2021-12-22 11:50:00,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:00,764 INFO L276 IsEmpty]: Start isEmpty. Operand 7218 states and 10417 transitions. [2021-12-22 11:50:00,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-22 11:50:00,768 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:50:00,769 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:50:00,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 11:50:00,769 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:50:00,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:50:00,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1385324011, now seen corresponding path program 1 times [2021-12-22 11:50:00,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:50:00,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895714308] [2021-12-22 11:50:00,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:50:00,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:50:00,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:50:00,947 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:50:00,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:50:00,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895714308] [2021-12-22 11:50:00,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895714308] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 11:50:00,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15053015] [2021-12-22 11:50:00,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:50:00,949 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 11:50:00,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:50:00,950 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) [2021-12-22 11:50:00,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 11:50:01,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:50:01,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-22 11:50:01,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 11:50:01,524 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 11:50:01,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 11:50:01,737 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 11:50:01,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15053015] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 11:50:01,738 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 11:50:01,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 14 [2021-12-22 11:50:01,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984186707] [2021-12-22 11:50:01,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 11:50:01,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 11:50:01,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:50:01,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 11:50:01,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-12-22 11:50:01,740 INFO L87 Difference]: Start difference. First operand 7218 states and 10417 transitions. Second operand has 14 states, 14 states have (on average 17.0) internal successors, (238), 14 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:10,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:50:10,919 INFO L93 Difference]: Finished difference Result 91924 states and 132191 transitions. [2021-12-22 11:50:10,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-12-22 11:50:10,920 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 17.0) internal successors, (238), 14 states have internal predecessors, (238), 0 states have call successors, (0), 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 84 [2021-12-22 11:50:10,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:50:11,137 INFO L225 Difference]: With dead ends: 91924 [2021-12-22 11:50:11,138 INFO L226 Difference]: Without dead ends: 84994 [2021-12-22 11:50:11,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3772 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1857, Invalid=7455, Unknown=0, NotChecked=0, Total=9312 [2021-12-22 11:50:11,179 INFO L933 BasicCegarLoop]: 488 mSDtfsCounter, 6778 mSDsluCounter, 2685 mSDsCounter, 0 mSdLazyCounter, 2339 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6778 SdHoareTripleChecker+Valid, 3173 SdHoareTripleChecker+Invalid, 2536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 2339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-22 11:50:11,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6778 Valid, 3173 Invalid, 2536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 2339 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-22 11:50:11,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84994 states. [2021-12-22 11:50:14,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84994 to 49302. [2021-12-22 11:50:14,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49302 states, 49301 states have (on average 1.4253463418591914) internal successors, (70271), 49301 states have internal predecessors, (70271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:15,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49302 states to 49302 states and 70271 transitions. [2021-12-22 11:50:15,079 INFO L78 Accepts]: Start accepts. Automaton has 49302 states and 70271 transitions. Word has length 84 [2021-12-22 11:50:15,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:50:15,079 INFO L470 AbstractCegarLoop]: Abstraction has 49302 states and 70271 transitions. [2021-12-22 11:50:15,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 17.0) internal successors, (238), 14 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:15,080 INFO L276 IsEmpty]: Start isEmpty. Operand 49302 states and 70271 transitions. [2021-12-22 11:50:15,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-22 11:50:15,088 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:50:15,089 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:50:15,106 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-22 11:50:15,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-22 11:50:15,290 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:50:15,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:50:15,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1919863804, now seen corresponding path program 1 times [2021-12-22 11:50:15,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:50:15,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871058839] [2021-12-22 11:50:15,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:50:15,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:50:15,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:50:15,323 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:50:15,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:50:15,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871058839] [2021-12-22 11:50:15,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871058839] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:50:15,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:50:15,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:50:15,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486973641] [2021-12-22 11:50:15,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:50:15,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:50:15,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:50:15,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:50:15,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:50:15,326 INFO L87 Difference]: Start difference. First operand 49302 states and 70271 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:18,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:50:18,894 INFO L93 Difference]: Finished difference Result 95094 states and 135561 transitions. [2021-12-22 11:50:18,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:50:18,895 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2021-12-22 11:50:18,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:50:19,062 INFO L225 Difference]: With dead ends: 95094 [2021-12-22 11:50:19,062 INFO L226 Difference]: Without dead ends: 67714 [2021-12-22 11:50:19,118 INFO L932 BasicCegarLoop]: 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 [2021-12-22 11:50:19,119 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 72 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 291 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 [2021-12-22 11:50:19,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 291 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:50:19,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67714 states. [2021-12-22 11:50:22,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67714 to 63482. [2021-12-22 11:50:23,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63482 states, 63481 states have (on average 1.4087522250752194) internal successors, (89429), 63481 states have internal predecessors, (89429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:23,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63482 states to 63482 states and 89429 transitions. [2021-12-22 11:50:23,129 INFO L78 Accepts]: Start accepts. Automaton has 63482 states and 89429 transitions. Word has length 84 [2021-12-22 11:50:23,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:50:23,130 INFO L470 AbstractCegarLoop]: Abstraction has 63482 states and 89429 transitions. [2021-12-22 11:50:23,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:23,130 INFO L276 IsEmpty]: Start isEmpty. Operand 63482 states and 89429 transitions. [2021-12-22 11:50:23,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-22 11:50:23,140 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:50:23,141 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:50:23,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 11:50:23,141 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:50:23,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:50:23,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1033627306, now seen corresponding path program 1 times [2021-12-22 11:50:23,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:50:23,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741790707] [2021-12-22 11:50:23,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:50:23,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:50:23,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:50:23,214 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-22 11:50:23,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:50:23,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741790707] [2021-12-22 11:50:23,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741790707] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:50:23,215 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:50:23,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 11:50:23,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484366491] [2021-12-22 11:50:23,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:50:23,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 11:50:23,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:50:23,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 11:50:23,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:50:23,217 INFO L87 Difference]: Start difference. First operand 63482 states and 89429 transitions. Second operand has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:29,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:50:29,587 INFO L93 Difference]: Finished difference Result 149388 states and 211620 transitions. [2021-12-22 11:50:29,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 11:50:29,588 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 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 84 [2021-12-22 11:50:29,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:50:29,824 INFO L225 Difference]: With dead ends: 149388 [2021-12-22 11:50:29,824 INFO L226 Difference]: Without dead ends: 121306 [2021-12-22 11:50:29,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-22 11:50:29,860 INFO L933 BasicCegarLoop]: 247 mSDtfsCounter, 678 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 824 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:50:29,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [678 Valid, 824 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:50:29,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121306 states. [2021-12-22 11:50:35,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121306 to 89144. [2021-12-22 11:50:35,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89144 states, 89143 states have (on average 1.4068743479577757) internal successors, (125413), 89143 states have internal predecessors, (125413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:35,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89144 states to 89144 states and 125413 transitions. [2021-12-22 11:50:35,916 INFO L78 Accepts]: Start accepts. Automaton has 89144 states and 125413 transitions. Word has length 84 [2021-12-22 11:50:35,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:50:35,917 INFO L470 AbstractCegarLoop]: Abstraction has 89144 states and 125413 transitions. [2021-12-22 11:50:35,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:35,917 INFO L276 IsEmpty]: Start isEmpty. Operand 89144 states and 125413 transitions. [2021-12-22 11:50:35,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-22 11:50:35,928 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:50:35,928 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:50:35,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 11:50:35,928 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:50:35,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:50:35,929 INFO L85 PathProgramCache]: Analyzing trace with hash -19484726, now seen corresponding path program 1 times [2021-12-22 11:50:35,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:50:35,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577442974] [2021-12-22 11:50:35,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:50:35,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:50:35,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:50:35,962 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:50:35,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:50:35,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577442974] [2021-12-22 11:50:35,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577442974] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:50:35,963 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:50:35,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:50:35,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172909107] [2021-12-22 11:50:35,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:50:35,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:50:35,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:50:35,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:50:35,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:50:35,965 INFO L87 Difference]: Start difference. First operand 89144 states and 125413 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:50:41,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:50:41,816 INFO L93 Difference]: Finished difference Result 143256 states and 200676 transitions. [2021-12-22 11:50:41,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:50:41,817 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2021-12-22 11:50:41,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:50:42,089 INFO L225 Difference]: With dead ends: 143256 [2021-12-22 11:50:42,089 INFO L226 Difference]: Without dead ends: 91970 [2021-12-22 11:50:42,123 INFO L932 BasicCegarLoop]: 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 [2021-12-22 11:50:42,123 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 73 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 304 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 [2021-12-22 11:50:42,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 304 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:50:42,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91970 states.