./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem16_label22.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem16_label22.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 61824f34d635413f2c8461e23bcb6dbedaef85995d2443839b8c05bab9ad7ca9 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 11:17:30,814 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 11:17:30,825 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 11:17:30,873 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 11:17:30,874 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 11:17:30,877 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 11:17:30,878 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 11:17:30,881 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 11:17:30,883 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 11:17:30,887 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 11:17:30,888 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 11:17:30,890 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 11:17:30,890 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 11:17:30,892 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 11:17:30,893 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 11:17:30,897 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 11:17:30,898 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 11:17:30,898 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 11:17:30,901 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 11:17:30,906 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 11:17:30,908 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 11:17:30,909 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 11:17:30,911 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 11:17:30,911 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 11:17:30,917 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 11:17:30,918 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 11:17:30,918 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 11:17:30,920 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 11:17:30,920 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 11:17:30,921 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 11:17:30,921 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 11:17:30,922 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 11:17:30,924 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 11:17:30,925 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 11:17:30,926 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 11:17:30,926 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 11:17:30,927 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 11:17:30,928 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 11:17:30,928 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 11:17:30,929 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 11:17:30,930 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 11:17:30,931 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 11:17:30,961 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 11:17:30,961 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 11:17:30,962 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 11:17:30,962 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 11:17:30,963 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 11:17:30,963 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 11:17:30,964 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 11:17:30,964 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 11:17:30,964 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 11:17:30,965 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 11:17:30,965 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 11:17:30,966 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 11:17:30,966 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 11:17:30,966 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 11:17:30,966 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 11:17:30,966 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 11:17:30,967 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 11:17:30,967 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 11:17:30,967 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 11:17:30,967 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 11:17:30,967 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 11:17:30,968 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 11:17:30,968 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 11:17:30,968 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 11:17:30,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:17:30,968 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 11:17:30,969 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 11:17:30,970 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 11:17:30,970 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 11:17:30,970 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 11:17:30,970 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 11:17:30,971 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 11:17:30,971 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 11:17:30,971 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 11:17:30,971 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 61824f34d635413f2c8461e23bcb6dbedaef85995d2443839b8c05bab9ad7ca9 [2021-12-21 11:17:31,204 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 11:17:31,229 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 11:17:31,231 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 11:17:31,232 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 11:17:31,233 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 11:17:31,234 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem16_label22.c [2021-12-21 11:17:31,306 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6e2ccdae/3d7ee6a49a104df3b886721b90bc0dc5/FLAGa6b7628f9 [2021-12-21 11:17:31,850 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 11:17:31,851 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label22.c [2021-12-21 11:17:31,872 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6e2ccdae/3d7ee6a49a104df3b886721b90bc0dc5/FLAGa6b7628f9 [2021-12-21 11:17:32,088 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6e2ccdae/3d7ee6a49a104df3b886721b90bc0dc5 [2021-12-21 11:17:32,092 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 11:17:32,094 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 11:17:32,097 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 11:17:32,097 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 11:17:32,100 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 11:17:32,101 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:17:32" (1/1) ... [2021-12-21 11:17:32,102 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c695b42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:17:32, skipping insertion in model container [2021-12-21 11:17:32,102 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:17:32" (1/1) ... [2021-12-21 11:17:32,108 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 11:17:32,169 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 11:17:32,331 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label22.c[1636,1649] [2021-12-21 11:17:32,650 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:17:32,664 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 11:17:32,685 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem16_label22.c[1636,1649] [2021-12-21 11:17:32,843 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 11:17:32,856 INFO L208 MainTranslator]: Completed translation [2021-12-21 11:17:32,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:17:32 WrapperNode [2021-12-21 11:17:32,857 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 11:17:32,858 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 11:17:32,858 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 11:17:32,858 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 11:17:32,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:17:32" (1/1) ... [2021-12-21 11:17:32,904 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:17:32" (1/1) ... [2021-12-21 11:17:32,998 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1768 [2021-12-21 11:17:32,999 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 11:17:33,000 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 11:17:33,000 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 11:17:33,000 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 11:17:33,008 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:17:32" (1/1) ... [2021-12-21 11:17:33,008 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:17:32" (1/1) ... [2021-12-21 11:17:33,022 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:17:32" (1/1) ... [2021-12-21 11:17:33,023 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:17:32" (1/1) ... [2021-12-21 11:17:33,125 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:17:32" (1/1) ... [2021-12-21 11:17:33,145 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:17:32" (1/1) ... [2021-12-21 11:17:33,163 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:17:32" (1/1) ... [2021-12-21 11:17:33,179 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 11:17:33,181 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 11:17:33,181 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 11:17:33,181 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 11:17:33,184 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:17:32" (1/1) ... [2021-12-21 11:17:33,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 11:17:33,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:17:33,213 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) [2021-12-21 11:17:33,225 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 [2021-12-21 11:17:33,250 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 11:17:33,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 11:17:33,251 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 11:17:33,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 11:17:33,308 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 11:17:33,310 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 11:17:35,031 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 11:17:35,041 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 11:17:35,042 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 11:17:35,044 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:17:35 BoogieIcfgContainer [2021-12-21 11:17:35,044 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 11:17:35,045 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 11:17:35,045 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 11:17:35,048 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 11:17:35,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 11:17:32" (1/3) ... [2021-12-21 11:17:35,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ea4b019 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:17:35, skipping insertion in model container [2021-12-21 11:17:35,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:17:32" (2/3) ... [2021-12-21 11:17:35,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ea4b019 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:17:35, skipping insertion in model container [2021-12-21 11:17:35,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:17:35" (3/3) ... [2021-12-21 11:17:35,051 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem16_label22.c [2021-12-21 11:17:35,056 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 11:17:35,056 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 11:17:35,098 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 11:17:35,104 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 [2021-12-21 11:17:35,104 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 11:17:35,123 INFO L276 IsEmpty]: Start isEmpty. Operand has 396 states, 394 states have (on average 1.8350253807106598) internal successors, (723), 395 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:35,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-21 11:17:35,128 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:17:35,129 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:17:35,129 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:17:35,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:17:35,134 INFO L85 PathProgramCache]: Analyzing trace with hash -461255479, now seen corresponding path program 1 times [2021-12-21 11:17:35,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:17:35,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574976896] [2021-12-21 11:17:35,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:35,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:17:35,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:35,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:17:35,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:17:35,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574976896] [2021-12-21 11:17:35,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574976896] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:17:35,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:17:35,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:17:35,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369625146] [2021-12-21 11:17:35,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:17:35,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:17:35,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:17:35,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:17:35,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:17:35,309 INFO L87 Difference]: Start difference. First operand has 396 states, 394 states have (on average 1.8350253807106598) internal successors, (723), 395 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:36,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:17:36,791 INFO L93 Difference]: Finished difference Result 1122 states and 2103 transitions. [2021-12-21 11:17:36,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:17:36,794 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-21 11:17:36,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:17:36,807 INFO L225 Difference]: With dead ends: 1122 [2021-12-21 11:17:36,808 INFO L226 Difference]: Without dead ends: 662 [2021-12-21 11:17:36,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:17:36,815 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 347 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 1054 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 1305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 1054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-21 11:17:36,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 223 Invalid, 1305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 1054 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-21 11:17:36,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2021-12-21 11:17:36,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 662. [2021-12-21 11:17:36,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 1.5824508320726172) internal successors, (1046), 661 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:36,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 1046 transitions. [2021-12-21 11:17:36,879 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 1046 transitions. Word has length 13 [2021-12-21 11:17:36,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:17:36,880 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 1046 transitions. [2021-12-21 11:17:36,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:36,880 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 1046 transitions. [2021-12-21 11:17:36,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-21 11:17:36,883 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:17:36,883 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:17:36,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 11:17:36,886 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:17:36,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:17:36,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1096230195, now seen corresponding path program 1 times [2021-12-21 11:17:36,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:17:36,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896163715] [2021-12-21 11:17:36,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:36,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:17:36,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:37,075 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:17:37,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:17:37,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896163715] [2021-12-21 11:17:37,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896163715] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:17:37,077 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:17:37,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:17:37,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740382315] [2021-12-21 11:17:37,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:17:37,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:17:37,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:17:37,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:17:37,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:17:37,081 INFO L87 Difference]: Start difference. First operand 662 states and 1046 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 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) [2021-12-21 11:17:38,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:17:38,178 INFO L93 Difference]: Finished difference Result 1651 states and 2539 transitions. [2021-12-21 11:17:38,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:17:38,184 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 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 [2021-12-21 11:17:38,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:17:38,189 INFO L225 Difference]: With dead ends: 1651 [2021-12-21 11:17:38,189 INFO L226 Difference]: Without dead ends: 991 [2021-12-21 11:17:38,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:17:38,194 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 338 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 1150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-21 11:17:38,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 77 Invalid, 1150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 882 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-21 11:17:38,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2021-12-21 11:17:38,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 991. [2021-12-21 11:17:38,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 990 states have (on average 1.3767676767676769) internal successors, (1363), 990 states have internal predecessors, (1363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:38,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 1363 transitions. [2021-12-21 11:17:38,225 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 1363 transitions. Word has length 84 [2021-12-21 11:17:38,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:17:38,226 INFO L470 AbstractCegarLoop]: Abstraction has 991 states and 1363 transitions. [2021-12-21 11:17:38,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 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) [2021-12-21 11:17:38,226 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 1363 transitions. [2021-12-21 11:17:38,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-21 11:17:38,228 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:17:38,229 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:17:38,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 11:17:38,229 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:17:38,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:17:38,230 INFO L85 PathProgramCache]: Analyzing trace with hash -38581384, now seen corresponding path program 1 times [2021-12-21 11:17:38,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:17:38,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106966718] [2021-12-21 11:17:38,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:38,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:17:38,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:38,298 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:17:38,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:17:38,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106966718] [2021-12-21 11:17:38,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106966718] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:17:38,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:17:38,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:17:38,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116723023] [2021-12-21 11:17:38,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:17:38,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:17:38,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:17:38,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:17:38,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:17:38,303 INFO L87 Difference]: Start difference. First operand 991 states and 1363 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:39,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:17:39,501 INFO L93 Difference]: Finished difference Result 2967 states and 4084 transitions. [2021-12-21 11:17:39,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:17:39,502 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 0 states have call successors, (0), 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 85 [2021-12-21 11:17:39,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:17:39,509 INFO L225 Difference]: With dead ends: 2967 [2021-12-21 11:17:39,509 INFO L226 Difference]: Without dead ends: 1978 [2021-12-21 11:17:39,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:17:39,512 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 289 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 1196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-21 11:17:39,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 209 Invalid, 1196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-21 11:17:39,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1978 states. [2021-12-21 11:17:39,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1978 to 1978. [2021-12-21 11:17:39,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1978 states, 1977 states have (on average 1.2468386444107233) internal successors, (2465), 1977 states have internal predecessors, (2465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:39,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 2465 transitions. [2021-12-21 11:17:39,550 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 2465 transitions. Word has length 85 [2021-12-21 11:17:39,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:17:39,551 INFO L470 AbstractCegarLoop]: Abstraction has 1978 states and 2465 transitions. [2021-12-21 11:17:39,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:39,551 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 2465 transitions. [2021-12-21 11:17:39,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-12-21 11:17:39,557 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:17:39,558 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:17:39,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 11:17:39,558 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:17:39,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:17:39,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1536310875, now seen corresponding path program 1 times [2021-12-21 11:17:39,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:17:39,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869785634] [2021-12-21 11:17:39,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:39,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:17:39,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:39,685 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 11:17:39,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:17:39,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869785634] [2021-12-21 11:17:39,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869785634] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:17:39,686 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:17:39,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:17:39,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062541869] [2021-12-21 11:17:39,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:17:39,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:17:39,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:17:39,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:17:39,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:17:39,689 INFO L87 Difference]: Start difference. First operand 1978 states and 2465 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:40,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:17:40,877 INFO L93 Difference]: Finished difference Result 4612 states and 5852 transitions. [2021-12-21 11:17:40,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:17:40,877 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 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 100 [2021-12-21 11:17:40,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:17:40,887 INFO L225 Difference]: With dead ends: 4612 [2021-12-21 11:17:40,888 INFO L226 Difference]: Without dead ends: 2636 [2021-12-21 11:17:40,891 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 [2021-12-21 11:17:40,901 INFO L933 BasicCegarLoop]: 533 mSDtfsCounter, 371 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 322 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-21 11:17:40,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 539 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [322 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-21 11:17:40,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2636 states. [2021-12-21 11:17:40,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2636 to 2636. [2021-12-21 11:17:40,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2636 states, 2635 states have (on average 1.21707779886148) internal successors, (3207), 2635 states have internal predecessors, (3207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:40,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2636 states to 2636 states and 3207 transitions. [2021-12-21 11:17:40,956 INFO L78 Accepts]: Start accepts. Automaton has 2636 states and 3207 transitions. Word has length 100 [2021-12-21 11:17:40,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:17:40,957 INFO L470 AbstractCegarLoop]: Abstraction has 2636 states and 3207 transitions. [2021-12-21 11:17:40,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 3 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:40,957 INFO L276 IsEmpty]: Start isEmpty. Operand 2636 states and 3207 transitions. [2021-12-21 11:17:40,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2021-12-21 11:17:40,971 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:17:40,972 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-21 11:17:40,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 11:17:40,972 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:17:40,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:17:40,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1824283015, now seen corresponding path program 1 times [2021-12-21 11:17:40,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:17:40,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217881559] [2021-12-21 11:17:40,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:40,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:17:41,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:41,175 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 186 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-12-21 11:17:41,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:17:41,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217881559] [2021-12-21 11:17:41,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217881559] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:17:41,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:17:41,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:17:41,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632282752] [2021-12-21 11:17:41,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:17:41,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:17:41,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:17:41,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:17:41,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:17:41,179 INFO L87 Difference]: Start difference. First operand 2636 states and 3207 transitions. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:42,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:17:42,339 INFO L93 Difference]: Finished difference Result 6586 states and 8078 transitions. [2021-12-21 11:17:42,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:17:42,340 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 states have internal predecessors, (198), 0 states have call successors, (0), 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 285 [2021-12-21 11:17:42,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:17:42,351 INFO L225 Difference]: With dead ends: 6586 [2021-12-21 11:17:42,352 INFO L226 Difference]: Without dead ends: 3294 [2021-12-21 11:17:42,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:17:42,357 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 358 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-21 11:17:42,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 156 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-21 11:17:42,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3294 states. [2021-12-21 11:17:42,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3294 to 3294. [2021-12-21 11:17:42,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3294 states, 3293 states have (on average 1.0652900091102337) internal successors, (3508), 3293 states have internal predecessors, (3508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:42,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3294 states to 3294 states and 3508 transitions. [2021-12-21 11:17:42,413 INFO L78 Accepts]: Start accepts. Automaton has 3294 states and 3508 transitions. Word has length 285 [2021-12-21 11:17:42,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:17:42,413 INFO L470 AbstractCegarLoop]: Abstraction has 3294 states and 3508 transitions. [2021-12-21 11:17:42,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:42,418 INFO L276 IsEmpty]: Start isEmpty. Operand 3294 states and 3508 transitions. [2021-12-21 11:17:42,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2021-12-21 11:17:42,448 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:17:42,448 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 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] [2021-12-21 11:17:42,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 11:17:42,450 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:17:42,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:17:42,452 INFO L85 PathProgramCache]: Analyzing trace with hash 2049321621, now seen corresponding path program 1 times [2021-12-21 11:17:42,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:17:42,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770027773] [2021-12-21 11:17:42,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:42,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:17:42,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:42,617 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 295 proven. 0 refuted. 0 times theorem prover too weak. 356 trivial. 0 not checked. [2021-12-21 11:17:42,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:17:42,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770027773] [2021-12-21 11:17:42,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770027773] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:17:42,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:17:42,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 11:17:42,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797180673] [2021-12-21 11:17:42,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:17:42,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:17:42,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:17:42,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:17:42,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:17:42,621 INFO L87 Difference]: Start difference. First operand 3294 states and 3508 transitions. Second operand has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 2 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:43,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:17:43,545 INFO L93 Difference]: Finished difference Result 9547 states and 10184 transitions. [2021-12-21 11:17:43,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:17:43,546 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 2 states have internal predecessors, (226), 0 states have call successors, (0), 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 451 [2021-12-21 11:17:43,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:17:43,566 INFO L225 Difference]: With dead ends: 9547 [2021-12-21 11:17:43,566 INFO L226 Difference]: Without dead ends: 6255 [2021-12-21 11:17:43,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:17:43,573 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 238 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 11:17:43,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 72 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-21 11:17:43,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6255 states. [2021-12-21 11:17:43,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6255 to 5926. [2021-12-21 11:17:43,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5926 states, 5925 states have (on average 1.0616033755274261) internal successors, (6290), 5925 states have internal predecessors, (6290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:43,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5926 states to 5926 states and 6290 transitions. [2021-12-21 11:17:43,707 INFO L78 Accepts]: Start accepts. Automaton has 5926 states and 6290 transitions. Word has length 451 [2021-12-21 11:17:43,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:17:43,707 INFO L470 AbstractCegarLoop]: Abstraction has 5926 states and 6290 transitions. [2021-12-21 11:17:43,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 2 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:43,708 INFO L276 IsEmpty]: Start isEmpty. Operand 5926 states and 6290 transitions. [2021-12-21 11:17:43,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 555 [2021-12-21 11:17:43,719 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:17:43,720 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:17:43,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 11:17:43,720 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:17:43,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:17:43,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1390635834, now seen corresponding path program 1 times [2021-12-21 11:17:43,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:17:43,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955673351] [2021-12-21 11:17:43,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:43,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:17:43,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:44,000 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 303 proven. 0 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-12-21 11:17:44,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:17:44,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955673351] [2021-12-21 11:17:44,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955673351] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:17:44,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:17:44,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:17:44,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195447813] [2021-12-21 11:17:44,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:17:44,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 11:17:44,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:17:44,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 11:17:44,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 11:17:44,003 INFO L87 Difference]: Start difference. First operand 5926 states and 6290 transitions. Second operand has 4 states, 4 states have (on average 90.25) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:45,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:17:45,042 INFO L93 Difference]: Finished difference Result 11571 states and 12296 transitions. [2021-12-21 11:17:45,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 11:17:45,043 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 90.25) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 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 554 [2021-12-21 11:17:45,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:17:45,061 INFO L225 Difference]: With dead ends: 11571 [2021-12-21 11:17:45,062 INFO L226 Difference]: Without dead ends: 5976 [2021-12-21 11:17:45,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-21 11:17:45,070 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 175 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-21 11:17:45,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 175 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1048 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-21 11:17:45,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5976 states. [2021-12-21 11:17:45,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5976 to 5926. [2021-12-21 11:17:45,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5926 states, 5925 states have (on average 1.061434599156118) internal successors, (6289), 5925 states have internal predecessors, (6289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:45,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5926 states to 5926 states and 6289 transitions. [2021-12-21 11:17:45,168 INFO L78 Accepts]: Start accepts. Automaton has 5926 states and 6289 transitions. Word has length 554 [2021-12-21 11:17:45,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:17:45,169 INFO L470 AbstractCegarLoop]: Abstraction has 5926 states and 6289 transitions. [2021-12-21 11:17:45,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 90.25) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:45,170 INFO L276 IsEmpty]: Start isEmpty. Operand 5926 states and 6289 transitions. [2021-12-21 11:17:45,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 670 [2021-12-21 11:17:45,185 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:17:45,185 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:17:45,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 11:17:45,186 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:17:45,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:17:45,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1945223882, now seen corresponding path program 1 times [2021-12-21 11:17:45,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:17:45,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540090604] [2021-12-21 11:17:45,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:45,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:17:45,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:45,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 806 proven. 0 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-12-21 11:17:45,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:17:45,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540090604] [2021-12-21 11:17:45,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540090604] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:17:45,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:17:45,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:17:45,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835513397] [2021-12-21 11:17:45,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:17:45,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:17:45,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:17:45,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:17:45,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:17:45,418 INFO L87 Difference]: Start difference. First operand 5926 states and 6289 transitions. Second operand has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:46,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:17:46,442 INFO L93 Difference]: Finished difference Result 14482 states and 15474 transitions. [2021-12-21 11:17:46,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:17:46,442 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 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 669 [2021-12-21 11:17:46,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:17:46,475 INFO L225 Difference]: With dead ends: 14482 [2021-12-21 11:17:46,475 INFO L226 Difference]: Without dead ends: 8887 [2021-12-21 11:17:46,483 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 [2021-12-21 11:17:46,484 INFO L933 BasicCegarLoop]: 420 mSDtfsCounter, 219 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 11:17:46,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 426 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-21 11:17:46,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8887 states. [2021-12-21 11:17:46,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8887 to 8558. [2021-12-21 11:17:46,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8558 states, 8557 states have (on average 1.048381442094192) internal successors, (8971), 8557 states have internal predecessors, (8971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:46,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8558 states to 8558 states and 8971 transitions. [2021-12-21 11:17:46,680 INFO L78 Accepts]: Start accepts. Automaton has 8558 states and 8971 transitions. Word has length 669 [2021-12-21 11:17:46,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:17:46,682 INFO L470 AbstractCegarLoop]: Abstraction has 8558 states and 8971 transitions. [2021-12-21 11:17:46,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:46,683 INFO L276 IsEmpty]: Start isEmpty. Operand 8558 states and 8971 transitions. [2021-12-21 11:17:46,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 772 [2021-12-21 11:17:46,704 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:17:46,704 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:17:46,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 11:17:46,706 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:17:46,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:17:46,707 INFO L85 PathProgramCache]: Analyzing trace with hash 100139087, now seen corresponding path program 1 times [2021-12-21 11:17:46,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:17:46,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312510334] [2021-12-21 11:17:46,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:46,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:17:46,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:46,944 INFO L134 CoverageAnalysis]: Checked inductivity of 911 backedges. 783 proven. 0 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2021-12-21 11:17:46,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:17:46,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312510334] [2021-12-21 11:17:46,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312510334] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:17:46,945 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:17:46,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:17:46,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915506565] [2021-12-21 11:17:46,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:17:46,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:17:46,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:17:46,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:17:46,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:17:46,948 INFO L87 Difference]: Start difference. First operand 8558 states and 8971 transitions. Second operand has 3 states, 3 states have (on average 218.66666666666666) internal successors, (656), 3 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:47,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:17:47,834 INFO L93 Difference]: Finished difference Result 19417 states and 20484 transitions. [2021-12-21 11:17:47,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:17:47,834 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 218.66666666666666) internal successors, (656), 3 states have internal predecessors, (656), 0 states have call successors, (0), 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 771 [2021-12-21 11:17:47,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:17:47,859 INFO L225 Difference]: With dead ends: 19417 [2021-12-21 11:17:47,859 INFO L226 Difference]: Without dead ends: 11190 [2021-12-21 11:17:47,869 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 [2021-12-21 11:17:47,871 INFO L933 BasicCegarLoop]: 408 mSDtfsCounter, 175 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 11:17:47,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 414 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 760 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 11:17:47,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11190 states. [2021-12-21 11:17:47,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11190 to 10532. [2021-12-21 11:17:48,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10532 states, 10531 states have (on average 1.0454847592821195) internal successors, (11010), 10531 states have internal predecessors, (11010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:48,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10532 states to 10532 states and 11010 transitions. [2021-12-21 11:17:48,016 INFO L78 Accepts]: Start accepts. Automaton has 10532 states and 11010 transitions. Word has length 771 [2021-12-21 11:17:48,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:17:48,016 INFO L470 AbstractCegarLoop]: Abstraction has 10532 states and 11010 transitions. [2021-12-21 11:17:48,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 218.66666666666666) internal successors, (656), 3 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:48,017 INFO L276 IsEmpty]: Start isEmpty. Operand 10532 states and 11010 transitions. [2021-12-21 11:17:48,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1030 [2021-12-21 11:17:48,036 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:17:48,037 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:17:48,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 11:17:48,038 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:17:48,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:17:48,038 INFO L85 PathProgramCache]: Analyzing trace with hash 678900935, now seen corresponding path program 1 times [2021-12-21 11:17:48,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:17:48,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620412533] [2021-12-21 11:17:48,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:48,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:17:48,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:48,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1873 backedges. 1374 proven. 0 refuted. 0 times theorem prover too weak. 499 trivial. 0 not checked. [2021-12-21 11:17:48,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:17:48,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620412533] [2021-12-21 11:17:48,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620412533] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:17:48,440 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:17:48,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:17:48,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493966419] [2021-12-21 11:17:48,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:17:48,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:17:48,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:17:48,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:17:48,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:17:48,442 INFO L87 Difference]: Start difference. First operand 10532 states and 11010 transitions. Second operand has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:49,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:17:49,301 INFO L93 Difference]: Finished difference Result 23694 states and 24916 transitions. [2021-12-21 11:17:49,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:17:49,308 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 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 1029 [2021-12-21 11:17:49,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:17:49,332 INFO L225 Difference]: With dead ends: 23694 [2021-12-21 11:17:49,333 INFO L226 Difference]: Without dead ends: 13493 [2021-12-21 11:17:49,341 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 [2021-12-21 11:17:49,342 INFO L933 BasicCegarLoop]: 427 mSDtfsCounter, 220 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 11:17:49,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 433 Invalid, 851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 11:17:49,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13493 states. [2021-12-21 11:17:49,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13493 to 12835. [2021-12-21 11:17:49,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12835 states, 12834 states have (on average 1.0409069658719028) internal successors, (13359), 12834 states have internal predecessors, (13359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:49,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12835 states to 12835 states and 13359 transitions. [2021-12-21 11:17:49,499 INFO L78 Accepts]: Start accepts. Automaton has 12835 states and 13359 transitions. Word has length 1029 [2021-12-21 11:17:49,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:17:49,500 INFO L470 AbstractCegarLoop]: Abstraction has 12835 states and 13359 transitions. [2021-12-21 11:17:49,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:49,500 INFO L276 IsEmpty]: Start isEmpty. Operand 12835 states and 13359 transitions. [2021-12-21 11:17:49,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1031 [2021-12-21 11:17:49,521 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:17:49,522 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:17:49,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 11:17:49,522 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:17:49,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:17:49,523 INFO L85 PathProgramCache]: Analyzing trace with hash -2062153128, now seen corresponding path program 1 times [2021-12-21 11:17:49,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:17:49,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322381844] [2021-12-21 11:17:49,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:49,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:17:49,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:50,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1878 backedges. 733 proven. 774 refuted. 0 times theorem prover too weak. 371 trivial. 0 not checked. [2021-12-21 11:17:50,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:17:50,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322381844] [2021-12-21 11:17:50,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322381844] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:17:50,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174887526] [2021-12-21 11:17:50,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:50,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:17:50,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:17:50,028 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) [2021-12-21 11:17:50,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 11:17:50,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:50,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 1232 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 11:17:50,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:17:52,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1878 backedges. 1090 proven. 0 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2021-12-21 11:17:52,013 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:17:52,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174887526] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:17:52,014 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 11:17:52,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-21 11:17:52,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142946439] [2021-12-21 11:17:52,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:17:52,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:17:52,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:17:52,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:17:52,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 11:17:52,017 INFO L87 Difference]: Start difference. First operand 12835 states and 13359 transitions. Second operand has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:52,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:17:52,806 INFO L93 Difference]: Finished difference Result 25339 states and 26385 transitions. [2021-12-21 11:17:52,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:17:52,807 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 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 1030 [2021-12-21 11:17:52,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:17:52,829 INFO L225 Difference]: With dead ends: 25339 [2021-12-21 11:17:52,830 INFO L226 Difference]: Without dead ends: 12835 [2021-12-21 11:17:52,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1034 GetRequests, 1030 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 11:17:52,843 INFO L933 BasicCegarLoop]: 371 mSDtfsCounter, 117 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 11:17:52,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 377 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 11:17:52,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12835 states. [2021-12-21 11:17:52,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12835 to 12835. [2021-12-21 11:17:52,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12835 states, 12834 states have (on average 1.0363877201184355) internal successors, (13301), 12834 states have internal predecessors, (13301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:53,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12835 states to 12835 states and 13301 transitions. [2021-12-21 11:17:53,005 INFO L78 Accepts]: Start accepts. Automaton has 12835 states and 13301 transitions. Word has length 1030 [2021-12-21 11:17:53,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:17:53,006 INFO L470 AbstractCegarLoop]: Abstraction has 12835 states and 13301 transitions. [2021-12-21 11:17:53,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:53,007 INFO L276 IsEmpty]: Start isEmpty. Operand 12835 states and 13301 transitions. [2021-12-21 11:17:53,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1202 [2021-12-21 11:17:53,032 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:17:53,033 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:17:53,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 11:17:53,247 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 [2021-12-21 11:17:53,248 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:17:53,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:17:53,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1046866302, now seen corresponding path program 1 times [2021-12-21 11:17:53,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:17:53,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696612202] [2021-12-21 11:17:53,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:53,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:17:53,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:53,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2684 backedges. 871 proven. 0 refuted. 0 times theorem prover too weak. 1813 trivial. 0 not checked. [2021-12-21 11:17:53,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:17:53,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696612202] [2021-12-21 11:17:53,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696612202] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:17:53,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:17:53,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:17:53,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471828238] [2021-12-21 11:17:53,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:17:53,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:17:53,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:17:53,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:17:53,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:17:53,718 INFO L87 Difference]: Start difference. First operand 12835 states and 13301 transitions. Second operand has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:54,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:17:54,592 INFO L93 Difference]: Finished difference Result 27642 states and 28662 transitions. [2021-12-21 11:17:54,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:17:54,592 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 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 1201 [2021-12-21 11:17:54,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:17:54,611 INFO L225 Difference]: With dead ends: 27642 [2021-12-21 11:17:54,612 INFO L226 Difference]: Without dead ends: 14151 [2021-12-21 11:17:54,622 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 [2021-12-21 11:17:54,623 INFO L933 BasicCegarLoop]: 405 mSDtfsCounter, 172 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 11:17:54,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 410 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 11:17:54,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14151 states. [2021-12-21 11:17:54,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14151 to 11848. [2021-12-21 11:17:54,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11848 states, 11847 states have (on average 1.0297121634168989) internal successors, (12199), 11847 states have internal predecessors, (12199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:54,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11848 states to 11848 states and 12199 transitions. [2021-12-21 11:17:54,746 INFO L78 Accepts]: Start accepts. Automaton has 11848 states and 12199 transitions. Word has length 1201 [2021-12-21 11:17:54,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:17:54,748 INFO L470 AbstractCegarLoop]: Abstraction has 11848 states and 12199 transitions. [2021-12-21 11:17:54,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:54,748 INFO L276 IsEmpty]: Start isEmpty. Operand 11848 states and 12199 transitions. [2021-12-21 11:17:54,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1278 [2021-12-21 11:17:54,771 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:17:54,772 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:17:54,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 11:17:54,772 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:17:54,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:17:54,773 INFO L85 PathProgramCache]: Analyzing trace with hash -551765767, now seen corresponding path program 1 times [2021-12-21 11:17:54,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:17:54,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251961450] [2021-12-21 11:17:54,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:54,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:17:54,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:55,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2699 backedges. 1943 proven. 0 refuted. 0 times theorem prover too weak. 756 trivial. 0 not checked. [2021-12-21 11:17:55,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:17:55,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251961450] [2021-12-21 11:17:55,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251961450] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:17:55,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:17:55,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:17:55,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137551929] [2021-12-21 11:17:55,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:17:55,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:17:55,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:17:55,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:17:55,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:17:55,202 INFO L87 Difference]: Start difference. First operand 11848 states and 12199 transitions. Second operand has 3 states, 3 states have (on average 239.66666666666666) internal successors, (719), 3 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:55,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:17:55,988 INFO L93 Difference]: Finished difference Result 23694 states and 24395 transitions. [2021-12-21 11:17:55,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:17:55,989 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 239.66666666666666) internal successors, (719), 3 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1277 [2021-12-21 11:17:55,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:17:56,043 INFO L225 Difference]: With dead ends: 23694 [2021-12-21 11:17:56,043 INFO L226 Difference]: Without dead ends: 11848 [2021-12-21 11:17:56,048 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 [2021-12-21 11:17:56,049 INFO L933 BasicCegarLoop]: 415 mSDtfsCounter, 193 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 11:17:56,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 421 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 11:17:56,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11848 states. [2021-12-21 11:17:56,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11848 to 11519. [2021-12-21 11:17:56,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11519 states, 11518 states have (on average 1.0210974127452683) internal successors, (11761), 11518 states have internal predecessors, (11761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:56,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11519 states to 11519 states and 11761 transitions. [2021-12-21 11:17:56,149 INFO L78 Accepts]: Start accepts. Automaton has 11519 states and 11761 transitions. Word has length 1277 [2021-12-21 11:17:56,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:17:56,150 INFO L470 AbstractCegarLoop]: Abstraction has 11519 states and 11761 transitions. [2021-12-21 11:17:56,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 239.66666666666666) internal successors, (719), 3 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:56,151 INFO L276 IsEmpty]: Start isEmpty. Operand 11519 states and 11761 transitions. [2021-12-21 11:17:56,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1303 [2021-12-21 11:17:56,173 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:17:56,174 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:17:56,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 11:17:56,175 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:17:56,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:17:56,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1497692149, now seen corresponding path program 1 times [2021-12-21 11:17:56,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:17:56,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042678703] [2021-12-21 11:17:56,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:56,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:17:56,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:56,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2849 backedges. 1541 proven. 0 refuted. 0 times theorem prover too weak. 1308 trivial. 0 not checked. [2021-12-21 11:17:56,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:17:56,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042678703] [2021-12-21 11:17:56,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042678703] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:17:56,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 11:17:56,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 11:17:56,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825090730] [2021-12-21 11:17:56,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:17:56,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:17:56,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:17:56,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:17:56,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 11:17:56,654 INFO L87 Difference]: Start difference. First operand 11519 states and 11761 transitions. Second operand has 3 states, 3 states have (on average 228.33333333333334) internal successors, (685), 3 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:57,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:17:57,435 INFO L93 Difference]: Finished difference Result 23365 states and 23858 transitions. [2021-12-21 11:17:57,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:17:57,435 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 228.33333333333334) internal successors, (685), 3 states have internal predecessors, (685), 0 states have call successors, (0), 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 1302 [2021-12-21 11:17:57,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:17:57,454 INFO L225 Difference]: With dead ends: 23365 [2021-12-21 11:17:57,455 INFO L226 Difference]: Without dead ends: 12177 [2021-12-21 11:17:57,463 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 [2021-12-21 11:17:57,464 INFO L933 BasicCegarLoop]: 426 mSDtfsCounter, 224 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 11:17:57,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 432 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 11:17:57,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12177 states. [2021-12-21 11:17:57,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12177 to 12177. [2021-12-21 11:17:57,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12177 states, 12176 states have (on average 1.0203679369250986) internal successors, (12424), 12176 states have internal predecessors, (12424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:57,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12177 states to 12177 states and 12424 transitions. [2021-12-21 11:17:57,598 INFO L78 Accepts]: Start accepts. Automaton has 12177 states and 12424 transitions. Word has length 1302 [2021-12-21 11:17:57,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:17:57,599 INFO L470 AbstractCegarLoop]: Abstraction has 12177 states and 12424 transitions. [2021-12-21 11:17:57,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 228.33333333333334) internal successors, (685), 3 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:17:57,600 INFO L276 IsEmpty]: Start isEmpty. Operand 12177 states and 12424 transitions. [2021-12-21 11:17:57,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1357 [2021-12-21 11:17:57,664 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:17:57,664 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:17:57,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 11:17:57,665 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:17:57,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:17:57,666 INFO L85 PathProgramCache]: Analyzing trace with hash -408573038, now seen corresponding path program 1 times [2021-12-21 11:17:57,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:17:57,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623497457] [2021-12-21 11:17:57,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:57,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:17:57,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:58,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2905 backedges. 2110 proven. 29 refuted. 0 times theorem prover too weak. 766 trivial. 0 not checked. [2021-12-21 11:17:58,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:17:58,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623497457] [2021-12-21 11:17:58,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623497457] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:17:58,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371520644] [2021-12-21 11:17:58,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:17:58,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:17:58,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:17:58,256 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 11:17:58,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 11:17:58,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:17:58,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 1589 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-21 11:17:58,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:18:03,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2905 backedges. 1558 proven. 201 refuted. 0 times theorem prover too weak. 1146 trivial. 0 not checked. [2021-12-21 11:18:03,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 11:18:09,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2905 backedges. 1558 proven. 201 refuted. 0 times theorem prover too weak. 1146 trivial. 0 not checked. [2021-12-21 11:18:09,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371520644] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 11:18:09,810 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 11:18:09,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 3, 3] total 12 [2021-12-21 11:18:09,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144990467] [2021-12-21 11:18:09,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 11:18:09,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 11:18:09,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:18:09,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 11:18:09,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-12-21 11:18:09,817 INFO L87 Difference]: Start difference. First operand 12177 states and 12424 transitions. Second operand has 12 states, 12 states have (on average 171.0) internal successors, (2052), 12 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:18:16,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:18:16,578 INFO L93 Difference]: Finished difference Result 34999 states and 35708 transitions. [2021-12-21 11:18:16,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-21 11:18:16,579 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 171.0) internal successors, (2052), 12 states have internal predecessors, (2052), 0 states have call successors, (0), 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 1356 [2021-12-21 11:18:16,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:18:16,603 INFO L225 Difference]: With dead ends: 34999 [2021-12-21 11:18:16,603 INFO L226 Difference]: Without dead ends: 23153 [2021-12-21 11:18:16,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2751 GetRequests, 2722 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=237, Invalid=693, Unknown=0, NotChecked=0, Total=930 [2021-12-21 11:18:16,652 INFO L933 BasicCegarLoop]: 318 mSDtfsCounter, 1316 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 14720 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1316 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 15007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 14720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2021-12-21 11:18:16,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1316 Valid, 537 Invalid, 15007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 14720 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2021-12-21 11:18:16,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23153 states. [2021-12-21 11:18:16,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23153 to 12506. [2021-12-21 11:18:16,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12506 states, 12505 states have (on average 1.0190323870451818) internal successors, (12743), 12505 states have internal predecessors, (12743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:18:16,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12506 states to 12506 states and 12743 transitions. [2021-12-21 11:18:16,840 INFO L78 Accepts]: Start accepts. Automaton has 12506 states and 12743 transitions. Word has length 1356 [2021-12-21 11:18:16,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:18:16,843 INFO L470 AbstractCegarLoop]: Abstraction has 12506 states and 12743 transitions. [2021-12-21 11:18:16,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 171.0) internal successors, (2052), 12 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:18:16,844 INFO L276 IsEmpty]: Start isEmpty. Operand 12506 states and 12743 transitions. [2021-12-21 11:18:16,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1558 [2021-12-21 11:18:16,870 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:18:16,873 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:18:16,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 11:18:17,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-21 11:18:17,100 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:18:17,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:18:17,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1243599529, now seen corresponding path program 1 times [2021-12-21 11:18:17,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:18:17,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976402801] [2021-12-21 11:18:17,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:18:17,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:18:17,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:18:17,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4719 backedges. 2029 proven. 156 refuted. 0 times theorem prover too weak. 2534 trivial. 0 not checked. [2021-12-21 11:18:17,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:18:17,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976402801] [2021-12-21 11:18:17,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976402801] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:18:17,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362741264] [2021-12-21 11:18:17,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:18:17,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:18:17,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:18:17,638 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 11:18:17,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 11:18:18,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:18:18,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 1832 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 11:18:18,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 11:18:19,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4719 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 4621 trivial. 0 not checked. [2021-12-21 11:18:19,642 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 11:18:19,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362741264] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 11:18:19,642 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 11:18:19,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-21 11:18:19,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845942653] [2021-12-21 11:18:19,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 11:18:19,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 11:18:19,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 11:18:19,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 11:18:19,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-21 11:18:19,644 INFO L87 Difference]: Start difference. First operand 12506 states and 12743 transitions. Second operand has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:18:20,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 11:18:20,291 INFO L93 Difference]: Finished difference Result 24681 states and 25153 transitions. [2021-12-21 11:18:20,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 11:18:20,291 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 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 1557 [2021-12-21 11:18:20,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 11:18:20,306 INFO L225 Difference]: With dead ends: 24681 [2021-12-21 11:18:20,306 INFO L226 Difference]: Without dead ends: 12506 [2021-12-21 11:18:20,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1561 GetRequests, 1556 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-21 11:18:20,315 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 348 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 11:18:20,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 54 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 11:18:20,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12506 states. [2021-12-21 11:18:20,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12506 to 12177. [2021-12-21 11:18:20,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12177 states, 12176 states have (on average 1.016015111695138) internal successors, (12371), 12176 states have internal predecessors, (12371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:18:20,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12177 states to 12177 states and 12371 transitions. [2021-12-21 11:18:20,425 INFO L78 Accepts]: Start accepts. Automaton has 12177 states and 12371 transitions. Word has length 1557 [2021-12-21 11:18:20,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 11:18:20,427 INFO L470 AbstractCegarLoop]: Abstraction has 12177 states and 12371 transitions. [2021-12-21 11:18:20,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 11:18:20,428 INFO L276 IsEmpty]: Start isEmpty. Operand 12177 states and 12371 transitions. [2021-12-21 11:18:20,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1590 [2021-12-21 11:18:20,482 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 11:18:20,482 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 11:18:20,500 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 11:18:20,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:18:20,683 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 11:18:20,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 11:18:20,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1267951879, now seen corresponding path program 1 times [2021-12-21 11:18:20,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 11:18:20,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168531227] [2021-12-21 11:18:20,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:18:20,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 11:18:20,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:18:21,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4943 backedges. 2093 proven. 156 refuted. 0 times theorem prover too weak. 2694 trivial. 0 not checked. [2021-12-21 11:18:21,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 11:18:21,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168531227] [2021-12-21 11:18:21,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168531227] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 11:18:21,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146677931] [2021-12-21 11:18:21,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 11:18:21,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 11:18:21,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 11:18:21,219 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 11:18:21,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 11:18:21,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 11:18:21,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 1861 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 11:18:21,574 INFO L286 TraceCheckSpWp]: Computing forward predicates...