./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f02e9f77b882be24d50c19f50ce800eb05eecbc064c8c6c7833bfe76a90e6ee8 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 11:59:07,008 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 11:59:07,010 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 11:59:07,059 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 11:59:07,060 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 11:59:07,063 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 11:59:07,070 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 11:59:07,073 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 11:59:07,074 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 11:59:07,078 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 11:59:07,079 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 11:59:07,080 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 11:59:07,080 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 11:59:07,081 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 11:59:07,082 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 11:59:07,082 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 11:59:07,083 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 11:59:07,084 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 11:59:07,085 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 11:59:07,086 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 11:59:07,087 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 11:59:07,088 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 11:59:07,088 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 11:59:07,089 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 11:59:07,091 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 11:59:07,091 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 11:59:07,091 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 11:59:07,092 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 11:59:07,093 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 11:59:07,093 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 11:59:07,094 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 11:59:07,094 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 11:59:07,095 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 11:59:07,096 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 11:59:07,096 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 11:59:07,097 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 11:59:07,097 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 11:59:07,097 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 11:59:07,098 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 11:59:07,098 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 11:59:07,099 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 11:59:07,104 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 11:59:07,134 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 11:59:07,134 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 11:59:07,135 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 11:59:07,135 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 11:59:07,136 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 11:59:07,136 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 11:59:07,136 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 11:59:07,137 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 11:59:07,137 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 11:59:07,137 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 11:59:07,138 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 11:59:07,138 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 11:59:07,138 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 11:59:07,138 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 11:59:07,138 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 11:59:07,139 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 11:59:07,139 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 11:59:07,139 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 11:59:07,139 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 11:59:07,139 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 11:59:07,139 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 11:59:07,140 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 11:59:07,140 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 11:59:07,140 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 11:59:07,140 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 11:59:07,140 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 11:59:07,140 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 11:59:07,141 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 11:59:07,142 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 11:59:07,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 11:59:07,142 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 11:59:07,142 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 11:59:07,142 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 11:59:07,143 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 11:59:07,143 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f02e9f77b882be24d50c19f50ce800eb05eecbc064c8c6c7833bfe76a90e6ee8 [2021-12-22 11:59:07,328 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 11:59:07,348 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 11:59:07,350 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 11:59:07,351 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 11:59:07,351 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 11:59:07,352 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-12-22 11:59:07,445 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d08f8674f/d27a270b64754de68cc1a637746396e8/FLAG07aa4a1bd [2021-12-22 11:59:07,854 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 11:59:07,858 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-12-22 11:59:07,873 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d08f8674f/d27a270b64754de68cc1a637746396e8/FLAG07aa4a1bd [2021-12-22 11:59:08,181 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d08f8674f/d27a270b64754de68cc1a637746396e8 [2021-12-22 11:59:08,183 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 11:59:08,184 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 11:59:08,185 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 11:59:08,185 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 11:59:08,187 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 11:59:08,188 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:59:08" (1/1) ... [2021-12-22 11:59:08,188 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2680b1ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:59:08, skipping insertion in model container [2021-12-22 11:59:08,189 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:59:08" (1/1) ... [2021-12-22 11:59:08,194 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 11:59:08,252 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 11:59:08,489 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-reduced/pals_floodmax.3.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[14419,14432] [2021-12-22 11:59:08,542 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 11:59:08,552 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 11:59:08,633 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-reduced/pals_floodmax.3.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[14419,14432] [2021-12-22 11:59:08,677 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 11:59:08,693 INFO L208 MainTranslator]: Completed translation [2021-12-22 11:59:08,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:59:08 WrapperNode [2021-12-22 11:59:08,694 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 11:59:08,695 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 11:59:08,695 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 11:59:08,695 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 11:59:08,700 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:59:08" (1/1) ... [2021-12-22 11:59:08,726 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:59:08" (1/1) ... [2021-12-22 11:59:08,789 INFO L137 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 1181 [2021-12-22 11:59:08,789 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 11:59:08,790 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 11:59:08,790 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 11:59:08,790 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 11:59:08,798 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:59:08" (1/1) ... [2021-12-22 11:59:08,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:59:08" (1/1) ... [2021-12-22 11:59:08,801 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:59:08" (1/1) ... [2021-12-22 11:59:08,801 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:59:08" (1/1) ... [2021-12-22 11:59:08,829 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:59:08" (1/1) ... [2021-12-22 11:59:08,841 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:59:08" (1/1) ... [2021-12-22 11:59:08,858 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:59:08" (1/1) ... [2021-12-22 11:59:08,863 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 11:59:08,864 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 11:59:08,865 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 11:59:08,865 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 11:59:08,866 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:59:08" (1/1) ... [2021-12-22 11:59:08,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 11:59:08,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:59:08,900 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 11:59:08,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 11:59:08,950 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 11:59:08,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 11:59:08,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 11:59:08,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 11:59:09,109 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 11:59:09,110 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 11:59:09,972 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 11:59:09,985 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 11:59:09,986 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-22 11:59:09,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:59:09 BoogieIcfgContainer [2021-12-22 11:59:09,989 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 11:59:09,990 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 11:59:09,990 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 11:59:09,993 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 11:59:09,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 11:59:08" (1/3) ... [2021-12-22 11:59:09,994 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c11b0ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:59:09, skipping insertion in model container [2021-12-22 11:59:09,994 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:59:08" (2/3) ... [2021-12-22 11:59:09,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c11b0ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:59:09, skipping insertion in model container [2021-12-22 11:59:09,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:59:09" (3/3) ... [2021-12-22 11:59:09,996 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-12-22 11:59:10,000 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 11:59:10,000 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 11:59:10,041 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 11:59:10,048 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 11:59:10,048 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 11:59:10,073 INFO L276 IsEmpty]: Start isEmpty. Operand has 312 states, 310 states have (on average 1.7806451612903227) internal successors, (552), 311 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:59:10,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-22 11:59:10,092 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:59:10,093 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, 1, 1, 1] [2021-12-22 11:59:10,094 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:59:10,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:59:10,099 INFO L85 PathProgramCache]: Analyzing trace with hash 811765820, now seen corresponding path program 1 times [2021-12-22 11:59:10,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:59:10,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570212365] [2021-12-22 11:59:10,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:59:10,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:59:10,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:59:10,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:59:10,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:59:10,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570212365] [2021-12-22 11:59:10,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570212365] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:59:10,551 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:59:10,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:59:10,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23379004] [2021-12-22 11:59:10,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:59:10,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:59:10,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:59:10,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:59:10,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:59:10,582 INFO L87 Difference]: Start difference. First operand has 312 states, 310 states have (on average 1.7806451612903227) internal successors, (552), 311 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:59:10,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:59:10,810 INFO L93 Difference]: Finished difference Result 634 states and 1113 transitions. [2021-12-22 11:59:10,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:59:10,813 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 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 146 [2021-12-22 11:59:10,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:59:10,826 INFO L225 Difference]: With dead ends: 634 [2021-12-22 11:59:10,826 INFO L226 Difference]: Without dead ends: 510 [2021-12-22 11:59:10,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:59:10,833 INFO L933 BasicCegarLoop]: 521 mSDtfsCounter, 372 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 919 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 11:59:10,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 919 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 11:59:10,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-12-22 11:59:10,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 508. [2021-12-22 11:59:10,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 1.4930966469428009) internal successors, (757), 507 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:59:10,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 757 transitions. [2021-12-22 11:59:10,921 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 757 transitions. Word has length 146 [2021-12-22 11:59:10,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:59:10,922 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 757 transitions. [2021-12-22 11:59:10,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:59:10,927 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 757 transitions. [2021-12-22 11:59:10,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-22 11:59:10,947 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:59:10,948 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, 1, 1, 1] [2021-12-22 11:59:10,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 11:59:10,948 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:59:10,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:59:10,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1665088068, now seen corresponding path program 1 times [2021-12-22 11:59:10,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:59:10,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294287872] [2021-12-22 11:59:10,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:59:10,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:59:11,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:59:11,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:59:11,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:59:11,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294287872] [2021-12-22 11:59:11,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294287872] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:59:11,175 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:59:11,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:59:11,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096074270] [2021-12-22 11:59:11,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:59:11,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:59:11,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:59:11,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:59:11,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:59:11,179 INFO L87 Difference]: Start difference. First operand 508 states and 757 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:59:11,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:59:11,294 INFO L93 Difference]: Finished difference Result 1104 states and 1692 transitions. [2021-12-22 11:59:11,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:59:11,295 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 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 146 [2021-12-22 11:59:11,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:59:11,303 INFO L225 Difference]: With dead ends: 1104 [2021-12-22 11:59:11,303 INFO L226 Difference]: Without dead ends: 894 [2021-12-22 11:59:11,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:59:11,312 INFO L933 BasicCegarLoop]: 421 mSDtfsCounter, 283 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 11:59:11,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 746 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 11:59:11,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2021-12-22 11:59:11,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 892. [2021-12-22 11:59:11,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 1.505050505050505) internal successors, (1341), 891 states have internal predecessors, (1341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:59:11,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 1341 transitions. [2021-12-22 11:59:11,383 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 1341 transitions. Word has length 146 [2021-12-22 11:59:11,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:59:11,385 INFO L470 AbstractCegarLoop]: Abstraction has 892 states and 1341 transitions. [2021-12-22 11:59:11,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:59:11,386 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 1341 transitions. [2021-12-22 11:59:11,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-12-22 11:59:11,396 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:59:11,397 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, 1, 1, 1] [2021-12-22 11:59:11,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 11:59:11,400 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:59:11,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:59:11,401 INFO L85 PathProgramCache]: Analyzing trace with hash -2001145712, now seen corresponding path program 1 times [2021-12-22 11:59:11,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:59:11,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545483630] [2021-12-22 11:59:11,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:59:11,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:59:11,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:59:11,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:59:11,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:59:11,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545483630] [2021-12-22 11:59:11,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545483630] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:59:11,594 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:59:11,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 11:59:11,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820740311] [2021-12-22 11:59:11,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:59:11,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 11:59:11,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:59:11,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 11:59:11,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 11:59:11,596 INFO L87 Difference]: Start difference. First operand 892 states and 1341 transitions. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:59:11,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:59:11,777 INFO L93 Difference]: Finished difference Result 2611 states and 3916 transitions. [2021-12-22 11:59:11,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 11:59:11,778 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 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 146 [2021-12-22 11:59:11,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:59:11,785 INFO L225 Difference]: With dead ends: 2611 [2021-12-22 11:59:11,785 INFO L226 Difference]: Without dead ends: 1728 [2021-12-22 11:59:11,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:59:11,793 INFO L933 BasicCegarLoop]: 778 mSDtfsCounter, 905 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 905 SdHoareTripleChecker+Valid, 1185 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:59:11,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [905 Valid, 1185 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:59:11,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1728 states. [2021-12-22 11:59:11,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1728 to 1726. [2021-12-22 11:59:11,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1726 states, 1725 states have (on average 1.488695652173913) internal successors, (2568), 1725 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:59:11,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 2568 transitions. [2021-12-22 11:59:11,920 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 2568 transitions. Word has length 146 [2021-12-22 11:59:11,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:59:11,920 INFO L470 AbstractCegarLoop]: Abstraction has 1726 states and 2568 transitions. [2021-12-22 11:59:11,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:59:11,921 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 2568 transitions. [2021-12-22 11:59:11,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-22 11:59:11,924 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:59:11,924 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, 1, 1, 1, 1] [2021-12-22 11:59:11,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 11:59:11,924 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:59:11,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:59:11,925 INFO L85 PathProgramCache]: Analyzing trace with hash -153017852, now seen corresponding path program 1 times [2021-12-22 11:59:11,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:59:11,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877975368] [2021-12-22 11:59:11,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:59:11,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:59:11,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:59:11,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:59:11,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:59:11,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877975368] [2021-12-22 11:59:11,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877975368] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:59:11,985 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:59:11,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:59:11,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682684529] [2021-12-22 11:59:11,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:59:11,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:59:11,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:59:11,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:59:11,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:59:11,987 INFO L87 Difference]: Start difference. First operand 1726 states and 2568 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:59:12,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:59:12,173 INFO L93 Difference]: Finished difference Result 5140 states and 7642 transitions. [2021-12-22 11:59:12,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:59:12,173 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 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 147 [2021-12-22 11:59:12,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:59:12,186 INFO L225 Difference]: With dead ends: 5140 [2021-12-22 11:59:12,186 INFO L226 Difference]: Without dead ends: 3442 [2021-12-22 11:59:12,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:59:12,190 INFO L933 BasicCegarLoop]: 519 mSDtfsCounter, 442 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 963 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:59:12,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 963 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:59:12,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3442 states. [2021-12-22 11:59:12,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3442 to 1728. [2021-12-22 11:59:12,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1728 states, 1727 states have (on average 1.4881297046902142) internal successors, (2570), 1727 states have internal predecessors, (2570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:59:12,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1728 states to 1728 states and 2570 transitions. [2021-12-22 11:59:12,346 INFO L78 Accepts]: Start accepts. Automaton has 1728 states and 2570 transitions. Word has length 147 [2021-12-22 11:59:12,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:59:12,347 INFO L470 AbstractCegarLoop]: Abstraction has 1728 states and 2570 transitions. [2021-12-22 11:59:12,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:59:12,347 INFO L276 IsEmpty]: Start isEmpty. Operand 1728 states and 2570 transitions. [2021-12-22 11:59:12,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-12-22 11:59:12,350 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:59:12,350 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, 1, 1, 1, 1, 1] [2021-12-22 11:59:12,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 11:59:12,351 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:59:12,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:59:12,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1214315247, now seen corresponding path program 1 times [2021-12-22 11:59:12,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:59:12,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488939718] [2021-12-22 11:59:12,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:59:12,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:59:12,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:59:12,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:59:12,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:59:12,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488939718] [2021-12-22 11:59:12,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488939718] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:59:12,487 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:59:12,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 11:59:12,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270208950] [2021-12-22 11:59:12,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:59:12,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 11:59:12,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:59:12,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 11:59:12,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 11:59:12,491 INFO L87 Difference]: Start difference. First operand 1728 states and 2570 transitions. Second operand has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:59:12,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:59:12,787 INFO L93 Difference]: Finished difference Result 5036 states and 7470 transitions. [2021-12-22 11:59:12,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 11:59:12,788 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 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 148 [2021-12-22 11:59:12,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:59:12,801 INFO L225 Difference]: With dead ends: 5036 [2021-12-22 11:59:12,801 INFO L226 Difference]: Without dead ends: 3338 [2021-12-22 11:59:12,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:59:12,806 INFO L933 BasicCegarLoop]: 759 mSDtfsCounter, 889 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 889 SdHoareTripleChecker+Valid, 1166 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 11:59:12,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [889 Valid, 1166 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 11:59:12,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2021-12-22 11:59:13,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 3336. [2021-12-22 11:59:13,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3336 states, 3335 states have (on average 1.471664167916042) internal successors, (4908), 3335 states have internal predecessors, (4908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:59:13,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3336 states to 3336 states and 4908 transitions. [2021-12-22 11:59:13,080 INFO L78 Accepts]: Start accepts. Automaton has 3336 states and 4908 transitions. Word has length 148 [2021-12-22 11:59:13,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:59:13,081 INFO L470 AbstractCegarLoop]: Abstraction has 3336 states and 4908 transitions. [2021-12-22 11:59:13,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:59:13,084 INFO L276 IsEmpty]: Start isEmpty. Operand 3336 states and 4908 transitions. [2021-12-22 11:59:13,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-12-22 11:59:13,088 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:59:13,089 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, 1, 1, 1, 1, 1, 1] [2021-12-22 11:59:13,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 11:59:13,089 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:59:13,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:59:13,090 INFO L85 PathProgramCache]: Analyzing trace with hash 568493541, now seen corresponding path program 1 times [2021-12-22 11:59:13,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:59:13,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952647065] [2021-12-22 11:59:13,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:59:13,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:59:13,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:59:13,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:59:13,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:59:13,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952647065] [2021-12-22 11:59:13,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952647065] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:59:13,135 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:59:13,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:59:13,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142320622] [2021-12-22 11:59:13,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:59:13,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:59:13,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:59:13,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:59:13,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:59:13,137 INFO L87 Difference]: Start difference. First operand 3336 states and 4908 transitions. Second operand has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:59:13,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:59:13,609 INFO L93 Difference]: Finished difference Result 9932 states and 14604 transitions. [2021-12-22 11:59:13,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:59:13,610 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 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 149 [2021-12-22 11:59:13,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:59:13,634 INFO L225 Difference]: With dead ends: 9932 [2021-12-22 11:59:13,634 INFO L226 Difference]: Without dead ends: 6640 [2021-12-22 11:59:13,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:59:13,642 INFO L933 BasicCegarLoop]: 524 mSDtfsCounter, 428 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 428 SdHoareTripleChecker+Valid, 968 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:59:13,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [428 Valid, 968 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:59:13,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6640 states. [2021-12-22 11:59:13,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6640 to 3340. [2021-12-22 11:59:13,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3340 states, 3339 states have (on average 1.47109913147649) internal successors, (4912), 3339 states have internal predecessors, (4912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:59:14,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3340 states to 3340 states and 4912 transitions. [2021-12-22 11:59:14,007 INFO L78 Accepts]: Start accepts. Automaton has 3340 states and 4912 transitions. Word has length 149 [2021-12-22 11:59:14,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:59:14,007 INFO L470 AbstractCegarLoop]: Abstraction has 3340 states and 4912 transitions. [2021-12-22 11:59:14,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.666666666666664) internal successors, (149), 3 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:59:14,008 INFO L276 IsEmpty]: Start isEmpty. Operand 3340 states and 4912 transitions. [2021-12-22 11:59:14,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-12-22 11:59:14,012 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:59:14,012 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, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:59:14,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 11:59:14,012 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:59:14,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:59:14,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1727483410, now seen corresponding path program 1 times [2021-12-22 11:59:14,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:59:14,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840145482] [2021-12-22 11:59:14,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:59:14,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:59:14,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:59:14,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:59:14,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:59:14,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840145482] [2021-12-22 11:59:14,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840145482] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:59:14,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:59:14,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 11:59:14,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411730575] [2021-12-22 11:59:14,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:59:14,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 11:59:14,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:59:14,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 11:59:14,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 11:59:14,130 INFO L87 Difference]: Start difference. First operand 3340 states and 4912 transitions. Second operand has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:59:14,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:59:14,803 INFO L93 Difference]: Finished difference Result 9071 states and 13289 transitions. [2021-12-22 11:59:14,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 11:59:14,803 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 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 150 [2021-12-22 11:59:14,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:59:14,823 INFO L225 Difference]: With dead ends: 9071 [2021-12-22 11:59:14,823 INFO L226 Difference]: Without dead ends: 5779 [2021-12-22 11:59:14,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:59:14,829 INFO L933 BasicCegarLoop]: 747 mSDtfsCounter, 884 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 884 SdHoareTripleChecker+Valid, 1154 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 11:59:14,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [884 Valid, 1154 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 11:59:14,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5779 states. [2021-12-22 11:59:15,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5779 to 5777. [2021-12-22 11:59:15,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5777 states, 5776 states have (on average 1.4485803324099722) internal successors, (8367), 5776 states have internal predecessors, (8367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:59:15,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5777 states to 5777 states and 8367 transitions. [2021-12-22 11:59:15,409 INFO L78 Accepts]: Start accepts. Automaton has 5777 states and 8367 transitions. Word has length 150 [2021-12-22 11:59:15,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:59:15,409 INFO L470 AbstractCegarLoop]: Abstraction has 5777 states and 8367 transitions. [2021-12-22 11:59:15,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:59:15,410 INFO L276 IsEmpty]: Start isEmpty. Operand 5777 states and 8367 transitions. [2021-12-22 11:59:15,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-12-22 11:59:15,417 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:59:15,417 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:59:15,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 11:59:15,418 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:59:15,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:59:15,420 INFO L85 PathProgramCache]: Analyzing trace with hash 982054470, now seen corresponding path program 1 times [2021-12-22 11:59:15,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:59:15,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470556831] [2021-12-22 11:59:15,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:59:15,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:59:15,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:59:15,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:59:15,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:59:15,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470556831] [2021-12-22 11:59:15,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470556831] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:59:15,460 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:59:15,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:59:15,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531910857] [2021-12-22 11:59:15,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:59:15,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:59:15,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:59:15,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:59:15,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:59:15,462 INFO L87 Difference]: Start difference. First operand 5777 states and 8367 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:59:16,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:59:16,562 INFO L93 Difference]: Finished difference Result 16923 states and 24559 transitions. [2021-12-22 11:59:16,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:59:16,563 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 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 151 [2021-12-22 11:59:16,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:59:16,605 INFO L225 Difference]: With dead ends: 16923 [2021-12-22 11:59:16,605 INFO L226 Difference]: Without dead ends: 11462 [2021-12-22 11:59:16,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:59:16,614 INFO L933 BasicCegarLoop]: 864 mSDtfsCounter, 414 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 1308 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:59:16,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [414 Valid, 1308 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:59:16,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11462 states. [2021-12-22 11:59:17,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11462 to 5785. [2021-12-22 11:59:17,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5785 states, 5784 states have (on average 1.4479598893499308) internal successors, (8375), 5784 states have internal predecessors, (8375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:59:17,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5785 states to 5785 states and 8375 transitions. [2021-12-22 11:59:17,250 INFO L78 Accepts]: Start accepts. Automaton has 5785 states and 8375 transitions. Word has length 151 [2021-12-22 11:59:17,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:59:17,251 INFO L470 AbstractCegarLoop]: Abstraction has 5785 states and 8375 transitions. [2021-12-22 11:59:17,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:59:17,251 INFO L276 IsEmpty]: Start isEmpty. Operand 5785 states and 8375 transitions. [2021-12-22 11:59:17,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-12-22 11:59:17,260 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:59:17,260 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:59:17,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 11:59:17,261 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:59:17,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:59:17,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1043523012, now seen corresponding path program 1 times [2021-12-22 11:59:17,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:59:17,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750901802] [2021-12-22 11:59:17,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:59:17,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:59:17,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:59:17,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:59:17,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:59:17,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750901802] [2021-12-22 11:59:17,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750901802] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:59:17,389 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:59:17,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:59:17,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798625014] [2021-12-22 11:59:17,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:59:17,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:59:17,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:59:17,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:59:17,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:59:17,392 INFO L87 Difference]: Start difference. First operand 5785 states and 8375 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:59:18,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:59:18,408 INFO L93 Difference]: Finished difference Result 15762 states and 22719 transitions. [2021-12-22 11:59:18,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 11:59:18,409 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 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 152 [2021-12-22 11:59:18,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:59:18,432 INFO L225 Difference]: With dead ends: 15762 [2021-12-22 11:59:18,433 INFO L226 Difference]: Without dead ends: 10065 [2021-12-22 11:59:18,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:59:18,446 INFO L933 BasicCegarLoop]: 755 mSDtfsCounter, 831 mSDsluCounter, 814 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 831 SdHoareTripleChecker+Valid, 1569 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 11:59:18,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [831 Valid, 1569 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 11:59:18,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10065 states. [2021-12-22 11:59:19,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10065 to 10063. [2021-12-22 11:59:19,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10063 states, 10062 states have (on average 1.4234744583581793) internal successors, (14323), 10062 states have internal predecessors, (14323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:59:19,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10063 states to 10063 states and 14323 transitions. [2021-12-22 11:59:19,497 INFO L78 Accepts]: Start accepts. Automaton has 10063 states and 14323 transitions. Word has length 152 [2021-12-22 11:59:19,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:59:19,497 INFO L470 AbstractCegarLoop]: Abstraction has 10063 states and 14323 transitions. [2021-12-22 11:59:19,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:59:19,498 INFO L276 IsEmpty]: Start isEmpty. Operand 10063 states and 14323 transitions. [2021-12-22 11:59:19,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-12-22 11:59:19,511 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:59:19,511 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:59:19,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 11:59:19,512 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:59:19,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:59:19,512 INFO L85 PathProgramCache]: Analyzing trace with hash -333116525, now seen corresponding path program 1 times [2021-12-22 11:59:19,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:59:19,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166735715] [2021-12-22 11:59:19,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:59:19,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:59:19,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:59:19,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:59:19,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:59:19,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166735715] [2021-12-22 11:59:19,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166735715] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:59:19,593 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:59:19,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 11:59:19,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121354004] [2021-12-22 11:59:19,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:59:19,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 11:59:19,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:59:19,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 11:59:19,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 11:59:19,594 INFO L87 Difference]: Start difference. First operand 10063 states and 14323 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:59:20,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:59:20,269 INFO L93 Difference]: Finished difference Result 18550 states and 26416 transitions. [2021-12-22 11:59:20,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 11:59:20,269 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 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 152 [2021-12-22 11:59:20,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:59:20,285 INFO L225 Difference]: With dead ends: 18550 [2021-12-22 11:59:20,285 INFO L226 Difference]: Without dead ends: 8561 [2021-12-22 11:59:20,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:59:20,300 INFO L933 BasicCegarLoop]: 495 mSDtfsCounter, 65 mSDsluCounter, 895 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 1390 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 [2021-12-22 11:59:20,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 1390 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:59:20,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8561 states. [2021-12-22 11:59:21,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8561 to 8561. [2021-12-22 11:59:21,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8561 states, 8560 states have (on average 1.424766355140187) internal successors, (12196), 8560 states have internal predecessors, (12196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:59:21,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8561 states to 8561 states and 12196 transitions. [2021-12-22 11:59:21,057 INFO L78 Accepts]: Start accepts. Automaton has 8561 states and 12196 transitions. Word has length 152 [2021-12-22 11:59:21,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:59:21,057 INFO L470 AbstractCegarLoop]: Abstraction has 8561 states and 12196 transitions. [2021-12-22 11:59:21,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:59:21,058 INFO L276 IsEmpty]: Start isEmpty. Operand 8561 states and 12196 transitions. [2021-12-22 11:59:21,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-12-22 11:59:21,068 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:59:21,068 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:59:21,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 11:59:21,068 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:59:21,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:59:21,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1970649822, now seen corresponding path program 1 times [2021-12-22 11:59:21,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:59:21,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220936024] [2021-12-22 11:59:21,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:59:21,070 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:59:21,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:59:21,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:59:21,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:59:21,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220936024] [2021-12-22 11:59:21,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220936024] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:59:21,122 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:59:21,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:59:21,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475511987] [2021-12-22 11:59:21,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:59:21,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:59:21,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:59:21,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:59:21,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:59:21,124 INFO L87 Difference]: Start difference. First operand 8561 states and 12196 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:59:22,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:59:22,553 INFO L93 Difference]: Finished difference Result 23111 states and 33322 transitions. [2021-12-22 11:59:22,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:59:22,554 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 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 158 [2021-12-22 11:59:22,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:59:22,586 INFO L225 Difference]: With dead ends: 23111 [2021-12-22 11:59:22,587 INFO L226 Difference]: Without dead ends: 15939 [2021-12-22 11:59:22,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:59:22,602 INFO L933 BasicCegarLoop]: 443 mSDtfsCounter, 306 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 778 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-22 11:59:22,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 778 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-22 11:59:22,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15939 states. [2021-12-22 11:59:24,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15939 to 15937. [2021-12-22 11:59:24,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15937 states, 15936 states have (on average 1.4254518072289157) internal successors, (22716), 15936 states have internal predecessors, (22716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:59:24,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15937 states to 15937 states and 22716 transitions. [2021-12-22 11:59:24,237 INFO L78 Accepts]: Start accepts. Automaton has 15937 states and 22716 transitions. Word has length 158 [2021-12-22 11:59:24,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:59:24,237 INFO L470 AbstractCegarLoop]: Abstraction has 15937 states and 22716 transitions. [2021-12-22 11:59:24,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:59:24,238 INFO L276 IsEmpty]: Start isEmpty. Operand 15937 states and 22716 transitions. [2021-12-22 11:59:24,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-12-22 11:59:24,254 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:59:24,255 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:59:24,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 11:59:24,255 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:59:24,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:59:24,256 INFO L85 PathProgramCache]: Analyzing trace with hash 242334909, now seen corresponding path program 1 times [2021-12-22 11:59:24,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:59:24,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010363903] [2021-12-22 11:59:24,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:59:24,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:59:24,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:59:24,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:59:24,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:59:24,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010363903] [2021-12-22 11:59:24,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010363903] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:59:24,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:59:24,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:59:24,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257129459] [2021-12-22 11:59:24,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:59:24,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:59:24,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:59:24,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:59:24,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:59:24,326 INFO L87 Difference]: Start difference. First operand 15937 states and 22716 transitions. Second operand has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:59:26,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:59:26,742 INFO L93 Difference]: Finished difference Result 34001 states and 51958 transitions. [2021-12-22 11:59:26,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 11:59:26,743 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 0 states have call successors, (0), 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 158 [2021-12-22 11:59:26,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:59:26,796 INFO L225 Difference]: With dead ends: 34001 [2021-12-22 11:59:26,796 INFO L226 Difference]: Without dead ends: 27797 [2021-12-22 11:59:26,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-22 11:59:26,818 INFO L933 BasicCegarLoop]: 551 mSDtfsCounter, 1004 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1004 SdHoareTripleChecker+Valid, 1413 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 11:59:26,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1004 Valid, 1413 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 11:59:26,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27797 states. [2021-12-22 11:59:28,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27797 to 22427. [2021-12-22 11:59:28,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22427 states, 22426 states have (on average 1.4789975920806206) internal successors, (33168), 22426 states have internal predecessors, (33168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:59:29,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22427 states to 22427 states and 33168 transitions. [2021-12-22 11:59:29,021 INFO L78 Accepts]: Start accepts. Automaton has 22427 states and 33168 transitions. Word has length 158 [2021-12-22 11:59:29,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:59:29,022 INFO L470 AbstractCegarLoop]: Abstraction has 22427 states and 33168 transitions. [2021-12-22 11:59:29,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.6) internal successors, (158), 5 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:59:29,023 INFO L276 IsEmpty]: Start isEmpty. Operand 22427 states and 33168 transitions. [2021-12-22 11:59:29,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-12-22 11:59:29,040 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:59:29,040 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:59:29,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 11:59:29,041 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:59:29,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:59:29,042 INFO L85 PathProgramCache]: Analyzing trace with hash 76678749, now seen corresponding path program 1 times [2021-12-22 11:59:29,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:59:29,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908018046] [2021-12-22 11:59:29,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:59:29,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:59:29,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:59:29,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:59:29,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:59:29,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908018046] [2021-12-22 11:59:29,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908018046] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:59:29,112 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:59:29,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:59:29,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268480903] [2021-12-22 11:59:29,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:59:29,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:59:29,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:59:29,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:59:29,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:59:29,115 INFO L87 Difference]: Start difference. First operand 22427 states and 33168 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:59:32,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:59:32,604 INFO L93 Difference]: Finished difference Result 52446 states and 79337 transitions. [2021-12-22 11:59:32,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:59:32,605 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 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 158 [2021-12-22 11:59:32,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:59:32,673 INFO L225 Difference]: With dead ends: 52446 [2021-12-22 11:59:32,673 INFO L226 Difference]: Without dead ends: 38996 [2021-12-22 11:59:32,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:59:32,703 INFO L933 BasicCegarLoop]: 418 mSDtfsCounter, 268 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 11:59:32,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 730 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 11:59:32,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38996 states. [2021-12-22 11:59:36,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38996 to 38994. [2021-12-22 11:59:36,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38994 states, 38993 states have (on average 1.474341548483061) internal successors, (57489), 38993 states have internal predecessors, (57489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:59:36,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38994 states to 38994 states and 57489 transitions. [2021-12-22 11:59:36,241 INFO L78 Accepts]: Start accepts. Automaton has 38994 states and 57489 transitions. Word has length 158 [2021-12-22 11:59:36,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:59:36,242 INFO L470 AbstractCegarLoop]: Abstraction has 38994 states and 57489 transitions. [2021-12-22 11:59:36,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:59:36,242 INFO L276 IsEmpty]: Start isEmpty. Operand 38994 states and 57489 transitions. [2021-12-22 11:59:36,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-12-22 11:59:36,271 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:59:36,271 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:59:36,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 11:59:36,271 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:59:36,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:59:36,272 INFO L85 PathProgramCache]: Analyzing trace with hash 871068425, now seen corresponding path program 1 times [2021-12-22 11:59:36,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:59:36,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553333575] [2021-12-22 11:59:36,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:59:36,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:59:36,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:59:36,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:59:36,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:59:36,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553333575] [2021-12-22 11:59:36,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553333575] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:59:36,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:59:36,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 11:59:36,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664910576] [2021-12-22 11:59:36,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:59:36,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 11:59:36,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:59:36,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 11:59:36,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-22 11:59:36,449 INFO L87 Difference]: Start difference. First operand 38994 states and 57489 transitions. Second operand has 8 states, 8 states have (on average 19.75) internal successors, (158), 8 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:59:40,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:59:40,348 INFO L93 Difference]: Finished difference Result 53202 states and 80177 transitions. [2021-12-22 11:59:40,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 11:59:40,348 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 19.75) internal successors, (158), 8 states have internal predecessors, (158), 0 states have call successors, (0), 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 158 [2021-12-22 11:59:40,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:59:40,409 INFO L225 Difference]: With dead ends: 53202 [2021-12-22 11:59:40,409 INFO L226 Difference]: Without dead ends: 38996 [2021-12-22 11:59:40,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-12-22 11:59:40,432 INFO L933 BasicCegarLoop]: 646 mSDtfsCounter, 2321 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2321 SdHoareTripleChecker+Valid, 1264 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 11:59:40,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2321 Valid, 1264 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 11:59:40,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38996 states. [2021-12-22 11:59:44,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38996 to 38994. [2021-12-22 11:59:44,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38994 states, 38993 states have (on average 1.4668017336445003) internal successors, (57195), 38993 states have internal predecessors, (57195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:59:44,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38994 states to 38994 states and 57195 transitions. [2021-12-22 11:59:44,190 INFO L78 Accepts]: Start accepts. Automaton has 38994 states and 57195 transitions. Word has length 158 [2021-12-22 11:59:44,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:59:44,191 INFO L470 AbstractCegarLoop]: Abstraction has 38994 states and 57195 transitions. [2021-12-22 11:59:44,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.75) internal successors, (158), 8 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:59:44,191 INFO L276 IsEmpty]: Start isEmpty. Operand 38994 states and 57195 transitions. [2021-12-22 11:59:44,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-12-22 11:59:44,212 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:59:44,212 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:59:44,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 11:59:44,212 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:59:44,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:59:44,213 INFO L85 PathProgramCache]: Analyzing trace with hash 331313387, now seen corresponding path program 1 times [2021-12-22 11:59:44,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:59:44,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143103104] [2021-12-22 11:59:44,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:59:44,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:59:44,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:59:44,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:59:44,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:59:44,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143103104] [2021-12-22 11:59:44,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143103104] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:59:44,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:59:44,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 11:59:44,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974131289] [2021-12-22 11:59:44,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:59:44,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 11:59:44,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:59:44,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 11:59:44,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 11:59:44,320 INFO L87 Difference]: Start difference. First operand 38994 states and 57195 transitions. Second operand has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:59:50,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:59:50,856 INFO L93 Difference]: Finished difference Result 102444 states and 150132 transitions. [2021-12-22 11:59:50,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 11:59:50,856 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 0 states have call successors, (0), 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 158 [2021-12-22 11:59:50,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:59:50,957 INFO L225 Difference]: With dead ends: 102444 [2021-12-22 11:59:50,957 INFO L226 Difference]: Without dead ends: 63584 [2021-12-22 11:59:51,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:59:51,005 INFO L933 BasicCegarLoop]: 763 mSDtfsCounter, 890 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 890 SdHoareTripleChecker+Valid, 1162 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:59:51,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [890 Valid, 1162 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:59:51,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63584 states. [2021-12-22 11:59:57,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63584 to 63582. [2021-12-22 11:59:58,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63582 states, 63581 states have (on average 1.4484987653544297) internal successors, (92097), 63581 states have internal predecessors, (92097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:59:58,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63582 states to 63582 states and 92097 transitions. [2021-12-22 11:59:58,143 INFO L78 Accepts]: Start accepts. Automaton has 63582 states and 92097 transitions. Word has length 158 [2021-12-22 11:59:58,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:59:58,144 INFO L470 AbstractCegarLoop]: Abstraction has 63582 states and 92097 transitions. [2021-12-22 11:59:58,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.5) internal successors, (158), 4 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:59:58,144 INFO L276 IsEmpty]: Start isEmpty. Operand 63582 states and 92097 transitions. [2021-12-22 11:59:58,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-22 11:59:58,175 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:59:58,175 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:59:58,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-22 11:59:58,176 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:59:58,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:59:58,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1081823353, now seen corresponding path program 1 times [2021-12-22 11:59:58,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:59:58,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218896994] [2021-12-22 11:59:58,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:59:58,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:59:58,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:59:58,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:59:58,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:59:58,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218896994] [2021-12-22 11:59:58,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218896994] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:59:58,267 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:59:58,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 11:59:58,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748609716] [2021-12-22 11:59:58,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:59:58,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 11:59:58,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:59:58,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 11:59:58,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 11:59:58,269 INFO L87 Difference]: Start difference. First operand 63582 states and 92097 transitions. Second operand has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)