./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4_overflow.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4_overflow.ufo.UNBOUNDED.pals.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 315c7f7d4f861da6991110ab8f251d6e6bbcbe86dfcb4a71343434e33094f4a7 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 01:13:48,159 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 01:13:48,160 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 01:13:48,179 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 01:13:48,180 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 01:13:48,181 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 01:13:48,182 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 01:13:48,183 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 01:13:48,184 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 01:13:48,185 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 01:13:48,186 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 01:13:48,187 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 01:13:48,194 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 01:13:48,196 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 01:13:48,196 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 01:13:48,197 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 01:13:48,198 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 01:13:48,198 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 01:13:48,200 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 01:13:48,201 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 01:13:48,202 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 01:13:48,203 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 01:13:48,204 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 01:13:48,204 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 01:13:48,206 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 01:13:48,206 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 01:13:48,207 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 01:13:48,207 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 01:13:48,208 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 01:13:48,208 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 01:13:48,208 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 01:13:48,209 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 01:13:48,210 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 01:13:48,210 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 01:13:48,211 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 01:13:48,211 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 01:13:48,212 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 01:13:48,212 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 01:13:48,212 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 01:13:48,213 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 01:13:48,213 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 01:13:48,214 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 01:13:48,242 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 01:13:48,243 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 01:13:48,243 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 01:13:48,243 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 01:13:48,244 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 01:13:48,244 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 01:13:48,245 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 01:13:48,245 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 01:13:48,245 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 01:13:48,245 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 01:13:48,245 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 01:13:48,245 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 01:13:48,246 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 01:13:48,246 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 01:13:48,246 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 01:13:48,246 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 01:13:48,246 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 01:13:48,246 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 01:13:48,247 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 01:13:48,247 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 01:13:48,247 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 01:13:48,247 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 01:13:48,247 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 01:13:48,248 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 01:13:48,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:13:48,248 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 01:13:48,248 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 01:13:48,248 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 01:13:48,248 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 01:13:48,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 01:13:48,249 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 01:13:48,249 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 01:13:48,249 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 01:13:48,249 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 315c7f7d4f861da6991110ab8f251d6e6bbcbe86dfcb4a71343434e33094f4a7 [2021-12-28 01:13:48,544 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 01:13:48,563 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 01:13:48,565 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 01:13:48,566 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 01:13:48,566 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 01:13:48,567 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4_overflow.ufo.UNBOUNDED.pals.c [2021-12-28 01:13:48,609 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64edab2ca/7249159726f0484ea20f29702e61d71c/FLAG82809bc9b [2021-12-28 01:13:49,055 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 01:13:49,056 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4_overflow.ufo.UNBOUNDED.pals.c [2021-12-28 01:13:49,065 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64edab2ca/7249159726f0484ea20f29702e61d71c/FLAG82809bc9b [2021-12-28 01:13:49,407 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/64edab2ca/7249159726f0484ea20f29702e61d71c [2021-12-28 01:13:49,409 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 01:13:49,409 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 01:13:49,414 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 01:13:49,414 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 01:13:49,417 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 01:13:49,417 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:13:49" (1/1) ... [2021-12-28 01:13:49,418 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78cc7587 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:13:49, skipping insertion in model container [2021-12-28 01:13:49,418 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:13:49" (1/1) ... [2021-12-28 01:13:49,422 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 01:13:49,465 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 01:13:49,797 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4_overflow.ufo.UNBOUNDED.pals.c[31111,31124] [2021-12-28 01:13:49,800 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:13:49,812 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 01:13:49,892 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_opt-floodmax.4_overflow.ufo.UNBOUNDED.pals.c[31111,31124] [2021-12-28 01:13:49,904 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:13:49,914 INFO L208 MainTranslator]: Completed translation [2021-12-28 01:13:49,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:13:49 WrapperNode [2021-12-28 01:13:49,916 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 01:13:49,917 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 01:13:49,917 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 01:13:49,917 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 01:13:49,922 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:13:49" (1/1) ... [2021-12-28 01:13:49,946 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:13:49" (1/1) ... [2021-12-28 01:13:49,983 INFO L137 Inliner]: procedures = 24, calls = 15, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 1000 [2021-12-28 01:13:49,991 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 01:13:49,992 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 01:13:49,992 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 01:13:49,992 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 01:13:49,998 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:13:49" (1/1) ... [2021-12-28 01:13:49,999 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:13:49" (1/1) ... [2021-12-28 01:13:50,004 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:13:49" (1/1) ... [2021-12-28 01:13:50,005 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:13:49" (1/1) ... [2021-12-28 01:13:50,023 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:13:49" (1/1) ... [2021-12-28 01:13:50,055 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:13:49" (1/1) ... [2021-12-28 01:13:50,057 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:13:49" (1/1) ... [2021-12-28 01:13:50,061 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 01:13:50,062 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 01:13:50,062 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 01:13:50,062 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 01:13:50,063 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:13:49" (1/1) ... [2021-12-28 01:13:50,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:13:50,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:13:50,105 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) [2021-12-28 01:13:50,128 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 [2021-12-28 01:13:50,138 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 01:13:50,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 01:13:50,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 01:13:50,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 01:13:50,236 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 01:13:50,238 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 01:13:51,021 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 01:13:51,034 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 01:13:51,034 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-28 01:13:51,037 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:13:51 BoogieIcfgContainer [2021-12-28 01:13:51,037 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 01:13:51,039 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 01:13:51,039 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 01:13:51,041 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 01:13:51,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 01:13:49" (1/3) ... [2021-12-28 01:13:51,042 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46a65a72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:13:51, skipping insertion in model container [2021-12-28 01:13:51,042 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:13:49" (2/3) ... [2021-12-28 01:13:51,042 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46a65a72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:13:51, skipping insertion in model container [2021-12-28 01:13:51,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:13:51" (3/3) ... [2021-12-28 01:13:51,043 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4_overflow.ufo.UNBOUNDED.pals.c [2021-12-28 01:13:51,047 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 01:13:51,047 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 01:13:51,088 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 01:13:51,094 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 [2021-12-28 01:13:51,094 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 01:13:51,113 INFO L276 IsEmpty]: Start isEmpty. Operand has 324 states, 322 states have (on average 1.8074534161490683) internal successors, (582), 323 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:51,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-28 01:13:51,122 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:13:51,123 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:13:51,124 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:13:51,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:13:51,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1105173396, now seen corresponding path program 1 times [2021-12-28 01:13:51,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:13:51,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992424961] [2021-12-28 01:13:51,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:13:51,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:13:51,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:13:51,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:13:51,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:13:51,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992424961] [2021-12-28 01:13:51,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992424961] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:13:51,427 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:13:51,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 01:13:51,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291972373] [2021-12-28 01:13:51,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:13:51,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-28 01:13:51,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:13:51,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-28 01:13:51,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-28 01:13:51,463 INFO L87 Difference]: Start difference. First operand has 324 states, 322 states have (on average 1.8074534161490683) internal successors, (582), 323 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 38.5) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:51,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:13:51,509 INFO L93 Difference]: Finished difference Result 449 states and 799 transitions. [2021-12-28 01:13:51,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-28 01:13:51,511 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 38.5) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-12-28 01:13:51,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:13:51,526 INFO L225 Difference]: With dead ends: 449 [2021-12-28 01:13:51,527 INFO L226 Difference]: Without dead ends: 320 [2021-12-28 01:13:51,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-28 01:13:51,534 INFO L933 BasicCegarLoop]: 575 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:13:51,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:13:51,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-12-28 01:13:51,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2021-12-28 01:13:51,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 1.8025078369905956) internal successors, (575), 319 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:51,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 575 transitions. [2021-12-28 01:13:51,597 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 575 transitions. Word has length 77 [2021-12-28 01:13:51,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:13:51,597 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 575 transitions. [2021-12-28 01:13:51,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 38.5) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:51,598 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 575 transitions. [2021-12-28 01:13:51,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-28 01:13:51,605 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:13:51,605 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:13:51,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 01:13:51,606 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:13:51,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:13:51,607 INFO L85 PathProgramCache]: Analyzing trace with hash 971159890, now seen corresponding path program 1 times [2021-12-28 01:13:51,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:13:51,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101360] [2021-12-28 01:13:51,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:13:51,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:13:51,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:13:51,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:13:51,800 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:13:51,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101360] [2021-12-28 01:13:51,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101360] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:13:51,801 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:13:51,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:13:51,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521944200] [2021-12-28 01:13:51,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:13:51,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:13:51,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:13:51,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:13:51,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:13:51,803 INFO L87 Difference]: Start difference. First operand 320 states and 575 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:51,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:13:51,893 INFO L93 Difference]: Finished difference Result 448 states and 792 transitions. [2021-12-28 01:13:51,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:13:51,895 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-12-28 01:13:51,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:13:51,896 INFO L225 Difference]: With dead ends: 448 [2021-12-28 01:13:51,897 INFO L226 Difference]: Without dead ends: 320 [2021-12-28 01:13:51,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:13:51,898 INFO L933 BasicCegarLoop]: 573 mSDtfsCounter, 3 mSDsluCounter, 1670 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 2243 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:13:51,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 2243 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:13:51,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-12-28 01:13:51,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2021-12-28 01:13:51,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 1.658307210031348) internal successors, (529), 319 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:51,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 529 transitions. [2021-12-28 01:13:51,925 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 529 transitions. Word has length 77 [2021-12-28 01:13:51,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:13:51,925 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 529 transitions. [2021-12-28 01:13:51,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:51,926 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 529 transitions. [2021-12-28 01:13:51,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-28 01:13:51,926 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:13:51,927 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:13:51,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 01:13:51,927 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:13:51,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:13:51,928 INFO L85 PathProgramCache]: Analyzing trace with hash 750751880, now seen corresponding path program 1 times [2021-12-28 01:13:51,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:13:51,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225992253] [2021-12-28 01:13:51,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:13:51,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:13:51,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:13:52,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:13:52,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:13:52,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225992253] [2021-12-28 01:13:52,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225992253] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:13:52,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:13:52,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:13:52,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091946179] [2021-12-28 01:13:52,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:13:52,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:13:52,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:13:52,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:13:52,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:13:52,031 INFO L87 Difference]: Start difference. First operand 320 states and 529 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:52,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:13:52,076 INFO L93 Difference]: Finished difference Result 556 states and 933 transitions. [2021-12-28 01:13:52,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:13:52,077 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 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 122 [2021-12-28 01:13:52,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:13:52,080 INFO L225 Difference]: With dead ends: 556 [2021-12-28 01:13:52,080 INFO L226 Difference]: Without dead ends: 432 [2021-12-28 01:13:52,081 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 [2021-12-28 01:13:52,086 INFO L933 BasicCegarLoop]: 524 mSDtfsCounter, 183 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 998 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:13:52,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 998 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:13:52,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-12-28 01:13:52,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 430. [2021-12-28 01:13:52,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 429 states have (on average 1.6643356643356644) internal successors, (714), 429 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:52,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 714 transitions. [2021-12-28 01:13:52,103 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 714 transitions. Word has length 122 [2021-12-28 01:13:52,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:13:52,105 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 714 transitions. [2021-12-28 01:13:52,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:52,106 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 714 transitions. [2021-12-28 01:13:52,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-28 01:13:52,110 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:13:52,110 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:13:52,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 01:13:52,111 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:13:52,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:13:52,113 INFO L85 PathProgramCache]: Analyzing trace with hash -44233893, now seen corresponding path program 1 times [2021-12-28 01:13:52,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:13:52,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904087605] [2021-12-28 01:13:52,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:13:52,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:13:52,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:13:52,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:13:52,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:13:52,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904087605] [2021-12-28 01:13:52,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904087605] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:13:52,217 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:13:52,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:13:52,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142256169] [2021-12-28 01:13:52,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:13:52,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:13:52,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:13:52,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:13:52,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:13:52,219 INFO L87 Difference]: Start difference. First operand 430 states and 714 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:52,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:13:52,238 INFO L93 Difference]: Finished difference Result 878 states and 1474 transitions. [2021-12-28 01:13:52,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:13:52,238 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-12-28 01:13:52,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:13:52,241 INFO L225 Difference]: With dead ends: 878 [2021-12-28 01:13:52,241 INFO L226 Difference]: Without dead ends: 644 [2021-12-28 01:13:52,242 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 [2021-12-28 01:13:52,243 INFO L933 BasicCegarLoop]: 527 mSDtfsCounter, 184 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 1010 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:13:52,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 1010 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:13:52,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-12-28 01:13:52,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 642. [2021-12-28 01:13:52,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 641 states have (on average 1.673946957878315) internal successors, (1073), 641 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:52,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 1073 transitions. [2021-12-28 01:13:52,273 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 1073 transitions. Word has length 125 [2021-12-28 01:13:52,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:13:52,273 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 1073 transitions. [2021-12-28 01:13:52,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 3 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:52,274 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 1073 transitions. [2021-12-28 01:13:52,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-12-28 01:13:52,275 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:13:52,275 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:13:52,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 01:13:52,275 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:13:52,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:13:52,276 INFO L85 PathProgramCache]: Analyzing trace with hash 487395088, now seen corresponding path program 1 times [2021-12-28 01:13:52,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:13:52,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58649125] [2021-12-28 01:13:52,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:13:52,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:13:52,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:13:52,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:13:52,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:13:52,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58649125] [2021-12-28 01:13:52,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58649125] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:13:52,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:13:52,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:13:52,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242638114] [2021-12-28 01:13:52,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:13:52,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:13:52,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:13:52,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:13:52,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:13:52,339 INFO L87 Difference]: Start difference. First operand 642 states and 1073 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:52,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:13:52,360 INFO L93 Difference]: Finished difference Result 1494 states and 2515 transitions. [2021-12-28 01:13:52,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:13:52,361 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 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 128 [2021-12-28 01:13:52,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:13:52,364 INFO L225 Difference]: With dead ends: 1494 [2021-12-28 01:13:52,364 INFO L226 Difference]: Without dead ends: 1048 [2021-12-28 01:13:52,365 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 [2021-12-28 01:13:52,365 INFO L933 BasicCegarLoop]: 527 mSDtfsCounter, 177 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 1011 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:13:52,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 1011 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:13:52,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2021-12-28 01:13:52,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 1046. [2021-12-28 01:13:52,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 1045 states have (on average 1.677511961722488) internal successors, (1753), 1045 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:52,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 1753 transitions. [2021-12-28 01:13:52,386 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 1753 transitions. Word has length 128 [2021-12-28 01:13:52,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:13:52,386 INFO L470 AbstractCegarLoop]: Abstraction has 1046 states and 1753 transitions. [2021-12-28 01:13:52,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:52,387 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 1753 transitions. [2021-12-28 01:13:52,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-28 01:13:52,388 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:13:52,388 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:13:52,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 01:13:52,389 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:13:52,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:13:52,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1255785821, now seen corresponding path program 1 times [2021-12-28 01:13:52,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:13:52,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543357841] [2021-12-28 01:13:52,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:13:52,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:13:52,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:13:52,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:13:52,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:13:52,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543357841] [2021-12-28 01:13:52,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543357841] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:13:52,441 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:13:52,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:13:52,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139467519] [2021-12-28 01:13:52,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:13:52,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:13:52,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:13:52,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:13:52,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:13:52,443 INFO L87 Difference]: Start difference. First operand 1046 states and 1753 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:52,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:13:52,492 INFO L93 Difference]: Finished difference Result 2666 states and 4483 transitions. [2021-12-28 01:13:52,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:13:52,493 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 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 131 [2021-12-28 01:13:52,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:13:52,498 INFO L225 Difference]: With dead ends: 2666 [2021-12-28 01:13:52,498 INFO L226 Difference]: Without dead ends: 1816 [2021-12-28 01:13:52,499 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 [2021-12-28 01:13:52,500 INFO L933 BasicCegarLoop]: 527 mSDtfsCounter, 170 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:13:52,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 1012 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:13:52,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1816 states. [2021-12-28 01:13:52,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1816 to 1814. [2021-12-28 01:13:52,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1813 states have (on average 1.6751241036955322) internal successors, (3037), 1813 states have internal predecessors, (3037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:52,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 3037 transitions. [2021-12-28 01:13:52,539 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 3037 transitions. Word has length 131 [2021-12-28 01:13:52,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:13:52,539 INFO L470 AbstractCegarLoop]: Abstraction has 1814 states and 3037 transitions. [2021-12-28 01:13:52,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:52,539 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 3037 transitions. [2021-12-28 01:13:52,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-28 01:13:52,541 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:13:52,541 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:13:52,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 01:13:52,542 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:13:52,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:13:52,542 INFO L85 PathProgramCache]: Analyzing trace with hash 871480728, now seen corresponding path program 1 times [2021-12-28 01:13:52,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:13:52,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636814563] [2021-12-28 01:13:52,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:13:52,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:13:52,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:13:52,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:13:52,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:13:52,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636814563] [2021-12-28 01:13:52,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636814563] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:13:52,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:13:52,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 01:13:52,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555638250] [2021-12-28 01:13:52,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:13:52,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 01:13:52,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:13:52,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 01:13:52,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:13:52,625 INFO L87 Difference]: Start difference. First operand 1814 states and 3037 transitions. Second operand has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:52,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:13:52,910 INFO L93 Difference]: Finished difference Result 9350 states and 15821 transitions. [2021-12-28 01:13:52,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 01:13:52,911 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 0 states have call successors, (0), 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 134 [2021-12-28 01:13:52,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:13:52,936 INFO L225 Difference]: With dead ends: 9350 [2021-12-28 01:13:52,936 INFO L226 Difference]: Without dead ends: 7732 [2021-12-28 01:13:52,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-28 01:13:52,943 INFO L933 BasicCegarLoop]: 521 mSDtfsCounter, 1685 mSDsluCounter, 3840 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1685 SdHoareTripleChecker+Valid, 4361 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:13:52,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1685 Valid, 4361 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:13:52,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7732 states. [2021-12-28 01:13:53,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7732 to 3322. [2021-12-28 01:13:53,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3322 states, 3321 states have (on average 1.6772056609454984) internal successors, (5570), 3321 states have internal predecessors, (5570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:53,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3322 states to 3322 states and 5570 transitions. [2021-12-28 01:13:53,105 INFO L78 Accepts]: Start accepts. Automaton has 3322 states and 5570 transitions. Word has length 134 [2021-12-28 01:13:53,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:13:53,108 INFO L470 AbstractCegarLoop]: Abstraction has 3322 states and 5570 transitions. [2021-12-28 01:13:53,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.333333333333332) internal successors, (134), 6 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:53,108 INFO L276 IsEmpty]: Start isEmpty. Operand 3322 states and 5570 transitions. [2021-12-28 01:13:53,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-28 01:13:53,110 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:13:53,110 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:13:53,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-28 01:13:53,111 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:13:53,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:13:53,112 INFO L85 PathProgramCache]: Analyzing trace with hash -848507773, now seen corresponding path program 1 times [2021-12-28 01:13:53,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:13:53,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79332758] [2021-12-28 01:13:53,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:13:53,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:13:53,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:13:53,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:13:53,169 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:13:53,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79332758] [2021-12-28 01:13:53,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79332758] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:13:53,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:13:53,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:13:53,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477596058] [2021-12-28 01:13:53,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:13:53,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:13:53,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:13:53,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:13:53,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 01:13:53,172 INFO L87 Difference]: Start difference. First operand 3322 states and 5570 transitions. Second operand has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:53,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:13:53,368 INFO L93 Difference]: Finished difference Result 9692 states and 16356 transitions. [2021-12-28 01:13:53,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 01:13:53,369 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 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 135 [2021-12-28 01:13:53,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:13:53,387 INFO L225 Difference]: With dead ends: 9692 [2021-12-28 01:13:53,388 INFO L226 Difference]: Without dead ends: 6566 [2021-12-28 01:13:53,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:13:53,393 INFO L933 BasicCegarLoop]: 524 mSDtfsCounter, 618 mSDsluCounter, 1193 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 1717 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:13:53,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [618 Valid, 1717 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:13:53,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6566 states. [2021-12-28 01:13:53,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6566 to 4927. [2021-12-28 01:13:53,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4927 states, 4926 states have (on average 1.6798619569630533) internal successors, (8275), 4926 states have internal predecessors, (8275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:53,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4927 states to 4927 states and 8275 transitions. [2021-12-28 01:13:53,575 INFO L78 Accepts]: Start accepts. Automaton has 4927 states and 8275 transitions. Word has length 135 [2021-12-28 01:13:53,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:13:53,575 INFO L470 AbstractCegarLoop]: Abstraction has 4927 states and 8275 transitions. [2021-12-28 01:13:53,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:53,576 INFO L276 IsEmpty]: Start isEmpty. Operand 4927 states and 8275 transitions. [2021-12-28 01:13:53,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-28 01:13:53,579 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:13:53,579 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:13:53,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-28 01:13:53,580 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:13:53,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:13:53,580 INFO L85 PathProgramCache]: Analyzing trace with hash 942022462, now seen corresponding path program 1 times [2021-12-28 01:13:53,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:13:53,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644633677] [2021-12-28 01:13:53,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:13:53,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:13:53,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:13:53,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:13:53,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:13:53,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644633677] [2021-12-28 01:13:53,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644633677] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:13:53,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:13:53,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:13:53,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445779189] [2021-12-28 01:13:53,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:13:53,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:13:53,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:13:53,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:13:53,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:13:53,625 INFO L87 Difference]: Start difference. First operand 4927 states and 8275 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:53,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:13:53,788 INFO L93 Difference]: Finished difference Result 9527 states and 16015 transitions. [2021-12-28 01:13:53,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:13:53,789 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 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 136 [2021-12-28 01:13:53,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:13:53,820 INFO L225 Difference]: With dead ends: 9527 [2021-12-28 01:13:53,820 INFO L226 Difference]: Without dead ends: 6957 [2021-12-28 01:13:53,824 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 [2021-12-28 01:13:53,826 INFO L933 BasicCegarLoop]: 652 mSDtfsCounter, 185 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 1141 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:13:53,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 1141 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:13:53,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6957 states. [2021-12-28 01:13:54,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6957 to 6955. [2021-12-28 01:13:54,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6955 states, 6954 states have (on average 1.674000575208513) internal successors, (11641), 6954 states have internal predecessors, (11641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:54,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6955 states to 6955 states and 11641 transitions. [2021-12-28 01:13:54,045 INFO L78 Accepts]: Start accepts. Automaton has 6955 states and 11641 transitions. Word has length 136 [2021-12-28 01:13:54,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:13:54,045 INFO L470 AbstractCegarLoop]: Abstraction has 6955 states and 11641 transitions. [2021-12-28 01:13:54,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:54,046 INFO L276 IsEmpty]: Start isEmpty. Operand 6955 states and 11641 transitions. [2021-12-28 01:13:54,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-28 01:13:54,047 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:13:54,047 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:13:54,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-28 01:13:54,048 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:13:54,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:13:54,048 INFO L85 PathProgramCache]: Analyzing trace with hash -506487182, now seen corresponding path program 1 times [2021-12-28 01:13:54,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:13:54,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473303350] [2021-12-28 01:13:54,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:13:54,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:13:54,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:13:54,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:13:54,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:13:54,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473303350] [2021-12-28 01:13:54,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473303350] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:13:54,089 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:13:54,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:13:54,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28351558] [2021-12-28 01:13:54,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:13:54,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:13:54,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:13:54,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:13:54,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:13:54,090 INFO L87 Difference]: Start difference. First operand 6955 states and 11641 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:54,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:13:54,303 INFO L93 Difference]: Finished difference Result 13407 states and 22463 transitions. [2021-12-28 01:13:54,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:13:54,304 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 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 136 [2021-12-28 01:13:54,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:13:54,321 INFO L225 Difference]: With dead ends: 13407 [2021-12-28 01:13:54,322 INFO L226 Difference]: Without dead ends: 9781 [2021-12-28 01:13:54,326 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 [2021-12-28 01:13:54,326 INFO L933 BasicCegarLoop]: 627 mSDtfsCounter, 178 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 1117 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:13:54,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 1117 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:13:54,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9781 states. [2021-12-28 01:13:54,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9781 to 9779. [2021-12-28 01:13:54,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9779 states, 9778 states have (on average 1.6677234608304357) internal successors, (16307), 9778 states have internal predecessors, (16307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:54,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9779 states to 9779 states and 16307 transitions. [2021-12-28 01:13:54,636 INFO L78 Accepts]: Start accepts. Automaton has 9779 states and 16307 transitions. Word has length 136 [2021-12-28 01:13:54,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:13:54,637 INFO L470 AbstractCegarLoop]: Abstraction has 9779 states and 16307 transitions. [2021-12-28 01:13:54,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:54,638 INFO L276 IsEmpty]: Start isEmpty. Operand 9779 states and 16307 transitions. [2021-12-28 01:13:54,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-28 01:13:54,639 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:13:54,639 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:13:54,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-28 01:13:54,640 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:13:54,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:13:54,640 INFO L85 PathProgramCache]: Analyzing trace with hash -2094526018, now seen corresponding path program 1 times [2021-12-28 01:13:54,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:13:54,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319045179] [2021-12-28 01:13:54,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:13:54,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:13:54,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:13:54,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:13:54,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:13:54,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319045179] [2021-12-28 01:13:54,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319045179] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:13:54,686 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:13:54,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:13:54,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097108878] [2021-12-28 01:13:54,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:13:54,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:13:54,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:13:54,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:13:54,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:13:54,688 INFO L87 Difference]: Start difference. First operand 9779 states and 16307 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:55,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:13:55,042 INFO L93 Difference]: Finished difference Result 18739 states and 31281 transitions. [2021-12-28 01:13:55,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:13:55,043 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 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 136 [2021-12-28 01:13:55,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:13:55,067 INFO L225 Difference]: With dead ends: 18739 [2021-12-28 01:13:55,067 INFO L226 Difference]: Without dead ends: 13643 [2021-12-28 01:13:55,076 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 [2021-12-28 01:13:55,077 INFO L933 BasicCegarLoop]: 602 mSDtfsCounter, 171 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 1093 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:13:55,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 1093 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:13:55,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13643 states. [2021-12-28 01:13:55,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13643 to 13641. [2021-12-28 01:13:55,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13641 states, 13640 states have (on average 1.6607771260997068) internal successors, (22653), 13640 states have internal predecessors, (22653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:55,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13641 states to 13641 states and 22653 transitions. [2021-12-28 01:13:55,463 INFO L78 Accepts]: Start accepts. Automaton has 13641 states and 22653 transitions. Word has length 136 [2021-12-28 01:13:55,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:13:55,463 INFO L470 AbstractCegarLoop]: Abstraction has 13641 states and 22653 transitions. [2021-12-28 01:13:55,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:55,464 INFO L276 IsEmpty]: Start isEmpty. Operand 13641 states and 22653 transitions. [2021-12-28 01:13:55,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-28 01:13:55,466 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:13:55,466 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:13:55,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-28 01:13:55,466 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:13:55,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:13:55,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1835427887, now seen corresponding path program 1 times [2021-12-28 01:13:55,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:13:55,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540931044] [2021-12-28 01:13:55,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:13:55,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:13:55,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:13:55,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:13:55,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:13:55,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540931044] [2021-12-28 01:13:55,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540931044] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:13:55,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:13:55,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:13:55,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289485996] [2021-12-28 01:13:55,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:13:55,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:13:55,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:13:55,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:13:55,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 01:13:55,526 INFO L87 Difference]: Start difference. First operand 13641 states and 22653 transitions. Second operand has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:56,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:13:56,186 INFO L93 Difference]: Finished difference Result 44058 states and 73290 transitions. [2021-12-28 01:13:56,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 01:13:56,187 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 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 136 [2021-12-28 01:13:56,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:13:56,255 INFO L225 Difference]: With dead ends: 44058 [2021-12-28 01:13:56,256 INFO L226 Difference]: Without dead ends: 30777 [2021-12-28 01:13:56,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:13:56,276 INFO L933 BasicCegarLoop]: 518 mSDtfsCounter, 617 mSDsluCounter, 1195 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 1713 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:13:56,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [617 Valid, 1713 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:13:56,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30777 states. [2021-12-28 01:13:57,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30777 to 22155. [2021-12-28 01:13:57,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22155 states, 22154 states have (on average 1.6551864223165116) internal successors, (36669), 22154 states have internal predecessors, (36669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:57,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22155 states to 22155 states and 36669 transitions. [2021-12-28 01:13:57,077 INFO L78 Accepts]: Start accepts. Automaton has 22155 states and 36669 transitions. Word has length 136 [2021-12-28 01:13:57,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:13:57,077 INFO L470 AbstractCegarLoop]: Abstraction has 22155 states and 36669 transitions. [2021-12-28 01:13:57,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:57,077 INFO L276 IsEmpty]: Start isEmpty. Operand 22155 states and 36669 transitions. [2021-12-28 01:13:57,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-28 01:13:57,079 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:13:57,079 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:13:57,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-28 01:13:57,079 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:13:57,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:13:57,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1829805838, now seen corresponding path program 1 times [2021-12-28 01:13:57,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:13:57,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351828286] [2021-12-28 01:13:57,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:13:57,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:13:57,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:13:57,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:13:57,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:13:57,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351828286] [2021-12-28 01:13:57,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351828286] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:13:57,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:13:57,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:13:57,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37956959] [2021-12-28 01:13:57,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:13:57,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:13:57,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:13:57,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:13:57,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:13:57,134 INFO L87 Difference]: Start difference. First operand 22155 states and 36669 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:57,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:13:57,976 INFO L93 Difference]: Finished difference Result 48794 states and 81139 transitions. [2021-12-28 01:13:57,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:13:57,977 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 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 136 [2021-12-28 01:13:57,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:13:58,038 INFO L225 Difference]: With dead ends: 48794 [2021-12-28 01:13:58,039 INFO L226 Difference]: Without dead ends: 33280 [2021-12-28 01:13:58,065 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 [2021-12-28 01:13:58,066 INFO L933 BasicCegarLoop]: 687 mSDtfsCounter, 192 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 1175 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:13:58,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 1175 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:13:58,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33280 states. [2021-12-28 01:13:58,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33280 to 33278. [2021-12-28 01:13:58,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33278 states, 33277 states have (on average 1.6503591068906451) internal successors, (54919), 33277 states have internal predecessors, (54919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:58,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33278 states to 33278 states and 54919 transitions. [2021-12-28 01:13:58,995 INFO L78 Accepts]: Start accepts. Automaton has 33278 states and 54919 transitions. Word has length 136 [2021-12-28 01:13:58,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:13:58,996 INFO L470 AbstractCegarLoop]: Abstraction has 33278 states and 54919 transitions. [2021-12-28 01:13:58,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 3 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:13:58,996 INFO L276 IsEmpty]: Start isEmpty. Operand 33278 states and 54919 transitions. [2021-12-28 01:13:58,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-12-28 01:13:58,997 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:13:58,997 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:13:58,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-28 01:13:58,998 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:13:58,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:13:58,998 INFO L85 PathProgramCache]: Analyzing trace with hash -692908230, now seen corresponding path program 1 times [2021-12-28 01:13:58,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:13:58,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002975978] [2021-12-28 01:13:58,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:13:58,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:13:59,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:13:59,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:13:59,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:13:59,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002975978] [2021-12-28 01:13:59,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002975978] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:13:59,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:13:59,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:13:59,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470410184] [2021-12-28 01:13:59,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:13:59,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:13:59,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:13:59,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:13:59,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 01:13:59,045 INFO L87 Difference]: Start difference. First operand 33278 states and 54919 transitions. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:14:00,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:14:00,770 INFO L93 Difference]: Finished difference Result 108186 states and 178737 transitions. [2021-12-28 01:14:00,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 01:14:00,771 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 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 137 [2021-12-28 01:14:00,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:14:00,929 INFO L225 Difference]: With dead ends: 108186 [2021-12-28 01:14:00,930 INFO L226 Difference]: Without dead ends: 75154 [2021-12-28 01:14:00,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:14:00,992 INFO L933 BasicCegarLoop]: 518 mSDtfsCounter, 615 mSDsluCounter, 1197 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 615 SdHoareTripleChecker+Valid, 1715 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:14:00,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [615 Valid, 1715 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:14:01,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75154 states. [2021-12-28 01:14:02,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75154 to 54073. [2021-12-28 01:14:02,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54073 states, 54072 states have (on average 1.6433459091581595) internal successors, (88859), 54072 states have internal predecessors, (88859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:14:02,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54073 states to 54073 states and 88859 transitions. [2021-12-28 01:14:02,790 INFO L78 Accepts]: Start accepts. Automaton has 54073 states and 88859 transitions. Word has length 137 [2021-12-28 01:14:02,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:14:02,791 INFO L470 AbstractCegarLoop]: Abstraction has 54073 states and 88859 transitions. [2021-12-28 01:14:02,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:14:02,792 INFO L276 IsEmpty]: Start isEmpty. Operand 54073 states and 88859 transitions. [2021-12-28 01:14:02,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-12-28 01:14:02,793 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:14:02,793 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:14:02,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-28 01:14:02,793 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:14:02,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:14:02,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1592912186, now seen corresponding path program 1 times [2021-12-28 01:14:02,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:14:02,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396730739] [2021-12-28 01:14:02,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:14:02,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:14:02,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:14:02,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:14:02,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:14:02,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396730739] [2021-12-28 01:14:02,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396730739] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:14:02,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:14:02,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:14:02,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769545093] [2021-12-28 01:14:02,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:14:02,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 01:14:02,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:14:02,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 01:14:02,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 01:14:02,842 INFO L87 Difference]: Start difference. First operand 54073 states and 88859 transitions. Second operand has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:14:05,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:14:05,569 INFO L93 Difference]: Finished difference Result 173820 states and 285957 transitions. [2021-12-28 01:14:05,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 01:14:05,570 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 138 [2021-12-28 01:14:05,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:14:05,803 INFO L225 Difference]: With dead ends: 173820 [2021-12-28 01:14:05,804 INFO L226 Difference]: Without dead ends: 119993 [2021-12-28 01:14:05,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:14:05,879 INFO L933 BasicCegarLoop]: 518 mSDtfsCounter, 613 mSDsluCounter, 1199 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 1717 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:14:05,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [613 Valid, 1717 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:14:05,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119993 states. [2021-12-28 01:14:08,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119993 to 86808. [2021-12-28 01:14:08,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86808 states, 86807 states have (on average 1.6364924487656525) internal successors, (142059), 86807 states have internal predecessors, (142059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:14:08,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86808 states to 86808 states and 142059 transitions. [2021-12-28 01:14:08,970 INFO L78 Accepts]: Start accepts. Automaton has 86808 states and 142059 transitions. Word has length 138 [2021-12-28 01:14:08,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:14:08,970 INFO L470 AbstractCegarLoop]: Abstraction has 86808 states and 142059 transitions. [2021-12-28 01:14:08,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.5) internal successors, (138), 4 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:14:08,971 INFO L276 IsEmpty]: Start isEmpty. Operand 86808 states and 142059 transitions. [2021-12-28 01:14:08,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-28 01:14:08,972 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:14:08,972 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:14:08,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-28 01:14:08,972 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:14:08,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:14:08,973 INFO L85 PathProgramCache]: Analyzing trace with hash 298565918, now seen corresponding path program 1 times [2021-12-28 01:14:08,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:14:08,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620746584] [2021-12-28 01:14:08,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:14:08,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:14:08,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:14:09,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:14:09,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:14:09,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620746584] [2021-12-28 01:14:09,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620746584] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:14:09,089 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:14:09,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 01:14:09,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840095849] [2021-12-28 01:14:09,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:14:09,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 01:14:09,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:14:09,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 01:14:09,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:14:09,090 INFO L87 Difference]: Start difference. First operand 86808 states and 142059 transitions. Second operand has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:14:11,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:14:11,635 INFO L93 Difference]: Finished difference Result 173372 states and 283726 transitions. [2021-12-28 01:14:11,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 01:14:11,637 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 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 140 [2021-12-28 01:14:11,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:14:11,773 INFO L225 Difference]: With dead ends: 173372 [2021-12-28 01:14:11,774 INFO L226 Difference]: Without dead ends: 86810 [2021-12-28 01:14:11,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:14:11,824 INFO L933 BasicCegarLoop]: 523 mSDtfsCounter, 843 mSDsluCounter, 1467 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 843 SdHoareTripleChecker+Valid, 1990 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:14:11,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [843 Valid, 1990 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:14:11,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86810 states. [2021-12-28 01:14:14,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86810 to 86808. [2021-12-28 01:14:14,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86808 states, 86807 states have (on average 1.629292568571659) internal successors, (141434), 86807 states have internal predecessors, (141434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:14:14,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86808 states to 86808 states and 141434 transitions. [2021-12-28 01:14:14,815 INFO L78 Accepts]: Start accepts. Automaton has 86808 states and 141434 transitions. Word has length 140 [2021-12-28 01:14:14,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:14:14,815 INFO L470 AbstractCegarLoop]: Abstraction has 86808 states and 141434 transitions. [2021-12-28 01:14:14,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.333333333333332) internal successors, (140), 6 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:14:14,815 INFO L276 IsEmpty]: Start isEmpty. Operand 86808 states and 141434 transitions. [2021-12-28 01:14:14,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-28 01:14:14,816 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:14:14,817 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:14:14,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-28 01:14:14,817 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:14:14,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:14:14,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1347255107, now seen corresponding path program 1 times [2021-12-28 01:14:14,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:14:14,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630423335] [2021-12-28 01:14:14,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:14:14,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:14:14,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:14:14,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:14:14,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:14:14,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630423335] [2021-12-28 01:14:14,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630423335] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:14:14,935 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:14:14,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 01:14:14,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716719702] [2021-12-28 01:14:14,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:14:14,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 01:14:14,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:14:14,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 01:14:14,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:14:14,937 INFO L87 Difference]: Start difference. First operand 86808 states and 141434 transitions. Second operand has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:14:19,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:14:19,327 INFO L93 Difference]: Finished difference Result 253786 states and 413914 transitions. [2021-12-28 01:14:19,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 01:14:19,328 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 0 states have call successors, (0), 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 143 [2021-12-28 01:14:19,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:14:19,683 INFO L225 Difference]: With dead ends: 253786 [2021-12-28 01:14:19,684 INFO L226 Difference]: Without dead ends: 167224 [2021-12-28 01:14:19,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:14:19,767 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 832 mSDsluCounter, 1485 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 832 SdHoareTripleChecker+Valid, 2001 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:14:19,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [832 Valid, 2001 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:14:19,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167224 states.