./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem11_label24.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem11_label24.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 63c3a28a771a7642d2d01d4b50ea8f0914adef37135dc9c64a20524a1e6d797b --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 04:23:59,929 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 04:23:59,930 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 04:23:59,979 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 04:23:59,980 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 04:23:59,981 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 04:23:59,982 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 04:23:59,983 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 04:23:59,985 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 04:23:59,986 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 04:23:59,987 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 04:23:59,988 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 04:23:59,989 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 04:23:59,992 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 04:23:59,993 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 04:23:59,995 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 04:23:59,997 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 04:24:00,001 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 04:24:00,002 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 04:24:00,007 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 04:24:00,010 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 04:24:00,013 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 04:24:00,014 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 04:24:00,014 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 04:24:00,017 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 04:24:00,020 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 04:24:00,020 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 04:24:00,021 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 04:24:00,021 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 04:24:00,022 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 04:24:00,023 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 04:24:00,023 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 04:24:00,024 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 04:24:00,025 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 04:24:00,026 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 04:24:00,026 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 04:24:00,027 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 04:24:00,028 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 04:24:00,028 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 04:24:00,029 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 04:24:00,029 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 04:24:00,030 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 04:24:00,058 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 04:24:00,059 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 04:24:00,059 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 04:24:00,059 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 04:24:00,060 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 04:24:00,060 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 04:24:00,061 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 04:24:00,061 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 04:24:00,061 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 04:24:00,061 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 04:24:00,062 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 04:24:00,062 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 04:24:00,063 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 04:24:00,063 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 04:24:00,063 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 04:24:00,063 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 04:24:00,063 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 04:24:00,063 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 04:24:00,064 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 04:24:00,064 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 04:24:00,064 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 04:24:00,064 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 04:24:00,064 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 04:24:00,064 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 04:24:00,065 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 04:24:00,065 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 04:24:00,065 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 04:24:00,066 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 04:24:00,066 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 04:24:00,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 04:24:00,067 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 04:24:00,067 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 04:24:00,067 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 04:24:00,067 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 04:24:00,067 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 63c3a28a771a7642d2d01d4b50ea8f0914adef37135dc9c64a20524a1e6d797b [2021-12-17 04:24:00,327 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 04:24:00,342 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 04:24:00,345 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 04:24:00,346 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 04:24:00,346 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 04:24:00,347 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem11_label24.c [2021-12-17 04:24:00,402 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22ba44be8/bfcb23bb7ba74345940b293553052a05/FLAGe08083300 [2021-12-17 04:24:00,958 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 04:24:00,958 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem11_label24.c [2021-12-17 04:24:00,986 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22ba44be8/bfcb23bb7ba74345940b293553052a05/FLAGe08083300 [2021-12-17 04:24:01,212 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22ba44be8/bfcb23bb7ba74345940b293553052a05 [2021-12-17 04:24:01,215 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 04:24:01,216 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 04:24:01,218 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 04:24:01,218 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 04:24:01,221 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 04:24:01,222 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 04:24:01" (1/1) ... [2021-12-17 04:24:01,223 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f4456ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:24:01, skipping insertion in model container [2021-12-17 04:24:01,223 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 04:24:01" (1/1) ... [2021-12-17 04:24:01,229 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 04:24:01,289 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 04:24:01,461 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem11_label24.c[7451,7464] [2021-12-17 04:24:01,679 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 04:24:01,692 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 04:24:01,725 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem11_label24.c[7451,7464] [2021-12-17 04:24:01,852 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 04:24:01,893 INFO L208 MainTranslator]: Completed translation [2021-12-17 04:24:01,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:24:01 WrapperNode [2021-12-17 04:24:01,906 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 04:24:01,908 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 04:24:01,908 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 04:24:01,908 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 04:24:01,914 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:24:01" (1/1) ... [2021-12-17 04:24:01,942 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:24:01" (1/1) ... [2021-12-17 04:24:02,059 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 999 [2021-12-17 04:24:02,060 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 04:24:02,061 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 04:24:02,061 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 04:24:02,061 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 04:24:02,069 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:24:01" (1/1) ... [2021-12-17 04:24:02,069 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:24:01" (1/1) ... [2021-12-17 04:24:02,086 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:24:01" (1/1) ... [2021-12-17 04:24:02,087 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:24:01" (1/1) ... [2021-12-17 04:24:02,130 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:24:01" (1/1) ... [2021-12-17 04:24:02,149 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:24:01" (1/1) ... [2021-12-17 04:24:02,160 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:24:01" (1/1) ... [2021-12-17 04:24:02,173 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 04:24:02,174 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 04:24:02,174 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 04:24:02,174 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 04:24:02,180 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:24:01" (1/1) ... [2021-12-17 04:24:02,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 04:24:02,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:24:02,208 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) [2021-12-17 04:24:02,216 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 [2021-12-17 04:24:02,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 04:24:02,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 04:24:02,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 04:24:02,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 04:24:02,303 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 04:24:02,304 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 04:24:03,534 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 04:24:03,547 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 04:24:03,548 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 04:24:03,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 04:24:03 BoogieIcfgContainer [2021-12-17 04:24:03,550 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 04:24:03,552 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 04:24:03,552 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 04:24:03,555 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 04:24:03,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 04:24:01" (1/3) ... [2021-12-17 04:24:03,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43fcba98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 04:24:03, skipping insertion in model container [2021-12-17 04:24:03,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:24:01" (2/3) ... [2021-12-17 04:24:03,556 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43fcba98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 04:24:03, skipping insertion in model container [2021-12-17 04:24:03,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 04:24:03" (3/3) ... [2021-12-17 04:24:03,557 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem11_label24.c [2021-12-17 04:24:03,560 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 04:24:03,561 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 04:24:03,599 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 04:24:03,603 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 [2021-12-17 04:24:03,604 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 04:24:03,619 INFO L276 IsEmpty]: Start isEmpty. Operand has 283 states, 281 states have (on average 1.7153024911032029) internal successors, (482), 282 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:03,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-12-17 04:24:03,626 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:24:03,626 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] [2021-12-17 04:24:03,627 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:24:03,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:24:03,631 INFO L85 PathProgramCache]: Analyzing trace with hash 2122806209, now seen corresponding path program 1 times [2021-12-17 04:24:03,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:24:03,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508089103] [2021-12-17 04:24:03,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:24:03,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:24:03,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:24:03,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:24:03,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:24:03,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508089103] [2021-12-17 04:24:03,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508089103] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:24:03,915 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:24:03,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:24:03,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254364356] [2021-12-17 04:24:03,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:24:03,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:24:03,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:24:03,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:24:03,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:24:03,953 INFO L87 Difference]: Start difference. First operand has 283 states, 281 states have (on average 1.7153024911032029) internal successors, (482), 282 states have internal predecessors, (482), 0 states have call successors, (0), 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 17.0) internal successors, (51), 2 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:04,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:24:04,999 INFO L93 Difference]: Finished difference Result 763 states and 1352 transitions. [2021-12-17 04:24:05,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:24:05,005 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 2 states have internal predecessors, (51), 0 states have call successors, (0), 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 51 [2021-12-17 04:24:05,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:24:05,024 INFO L225 Difference]: With dead ends: 763 [2021-12-17 04:24:05,024 INFO L226 Difference]: Without dead ends: 416 [2021-12-17 04:24:05,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:24:05,030 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 222 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 04:24:05,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 89 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 04:24:05,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-12-17 04:24:05,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 408. [2021-12-17 04:24:05,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 1.6142506142506143) internal successors, (657), 407 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:05,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 657 transitions. [2021-12-17 04:24:05,076 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 657 transitions. Word has length 51 [2021-12-17 04:24:05,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:24:05,077 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 657 transitions. [2021-12-17 04:24:05,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 2 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:05,077 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 657 transitions. [2021-12-17 04:24:05,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-12-17 04:24:05,080 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:24:05,081 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:24:05,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 04:24:05,081 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:24:05,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:24:05,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1953690878, now seen corresponding path program 1 times [2021-12-17 04:24:05,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:24:05,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728412886] [2021-12-17 04:24:05,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:24:05,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:24:05,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:24:05,218 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:24:05,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:24:05,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728412886] [2021-12-17 04:24:05,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728412886] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:24:05,219 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:24:05,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:24:05,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231992864] [2021-12-17 04:24:05,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:24:05,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:24:05,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:24:05,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:24:05,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:24:05,222 INFO L87 Difference]: Start difference. First operand 408 states and 657 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:05,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:24:05,931 INFO L93 Difference]: Finished difference Result 1191 states and 1927 transitions. [2021-12-17 04:24:05,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:24:05,932 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 0 states have call successors, (0), 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 116 [2021-12-17 04:24:05,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:24:05,935 INFO L225 Difference]: With dead ends: 1191 [2021-12-17 04:24:05,935 INFO L226 Difference]: Without dead ends: 785 [2021-12-17 04:24:05,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:24:05,938 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 157 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 04:24:05,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 156 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 04:24:05,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2021-12-17 04:24:05,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 601. [2021-12-17 04:24:05,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 600 states have (on average 1.5) internal successors, (900), 600 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:05,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 900 transitions. [2021-12-17 04:24:05,963 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 900 transitions. Word has length 116 [2021-12-17 04:24:05,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:24:05,963 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 900 transitions. [2021-12-17 04:24:05,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:05,964 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 900 transitions. [2021-12-17 04:24:05,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-12-17 04:24:05,967 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:24:05,967 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:24:05,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 04:24:05,968 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:24:05,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:24:05,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1424628072, now seen corresponding path program 1 times [2021-12-17 04:24:05,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:24:05,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210605735] [2021-12-17 04:24:05,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:24:05,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:24:06,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:24:06,050 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:24:06,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:24:06,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210605735] [2021-12-17 04:24:06,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210605735] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:24:06,051 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:24:06,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:24:06,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7753478] [2021-12-17 04:24:06,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:24:06,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:24:06,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:24:06,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:24:06,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:24:06,053 INFO L87 Difference]: Start difference. First operand 601 states and 900 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:06,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:24:06,743 INFO L93 Difference]: Finished difference Result 1582 states and 2353 transitions. [2021-12-17 04:24:06,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:24:06,744 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 0 states have call successors, (0), 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 119 [2021-12-17 04:24:06,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:24:06,747 INFO L225 Difference]: With dead ends: 1582 [2021-12-17 04:24:06,748 INFO L226 Difference]: Without dead ends: 983 [2021-12-17 04:24:06,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:24:06,750 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 144 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 04:24:06,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 115 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 04:24:06,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2021-12-17 04:24:06,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 972. [2021-12-17 04:24:06,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 971 states have (on average 1.3707518022657055) internal successors, (1331), 971 states have internal predecessors, (1331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:06,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 1331 transitions. [2021-12-17 04:24:06,773 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 1331 transitions. Word has length 119 [2021-12-17 04:24:06,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:24:06,774 INFO L470 AbstractCegarLoop]: Abstraction has 972 states and 1331 transitions. [2021-12-17 04:24:06,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 2 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:06,774 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 1331 transitions. [2021-12-17 04:24:06,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-12-17 04:24:06,783 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:24:06,783 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:24:06,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 04:24:06,784 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:24:06,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:24:06,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1033925576, now seen corresponding path program 1 times [2021-12-17 04:24:06,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:24:06,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35468904] [2021-12-17 04:24:06,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:24:06,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:24:06,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:24:06,906 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:24:06,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:24:06,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35468904] [2021-12-17 04:24:06,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35468904] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:24:06,908 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:24:06,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:24:06,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815181963] [2021-12-17 04:24:06,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:24:06,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:24:06,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:24:06,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:24:06,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:24:06,910 INFO L87 Difference]: Start difference. First operand 972 states and 1331 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:07,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:24:07,614 INFO L93 Difference]: Finished difference Result 2680 states and 3671 transitions. [2021-12-17 04:24:07,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:24:07,615 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-12-17 04:24:07,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:24:07,620 INFO L225 Difference]: With dead ends: 2680 [2021-12-17 04:24:07,621 INFO L226 Difference]: Without dead ends: 1710 [2021-12-17 04:24:07,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:24:07,623 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 120 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 04:24:07,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 192 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 04:24:07,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1710 states. [2021-12-17 04:24:07,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1710 to 1709. [2021-12-17 04:24:07,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1709 states, 1708 states have (on average 1.2318501170960188) internal successors, (2104), 1708 states have internal predecessors, (2104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:07,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1709 states to 1709 states and 2104 transitions. [2021-12-17 04:24:07,653 INFO L78 Accepts]: Start accepts. Automaton has 1709 states and 2104 transitions. Word has length 120 [2021-12-17 04:24:07,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:24:07,654 INFO L470 AbstractCegarLoop]: Abstraction has 1709 states and 2104 transitions. [2021-12-17 04:24:07,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:07,654 INFO L276 IsEmpty]: Start isEmpty. Operand 1709 states and 2104 transitions. [2021-12-17 04:24:07,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-12-17 04:24:07,658 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:24:07,658 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:24:07,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 04:24:07,658 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:24:07,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:24:07,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1160646091, now seen corresponding path program 1 times [2021-12-17 04:24:07,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:24:07,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300958122] [2021-12-17 04:24:07,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:24:07,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:24:07,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:24:07,817 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 164 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:24:07,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:24:07,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300958122] [2021-12-17 04:24:07,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300958122] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:24:07,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:24:07,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:24:07,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283212862] [2021-12-17 04:24:07,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:24:07,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:24:07,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:24:07,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:24:07,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:24:07,823 INFO L87 Difference]: Start difference. First operand 1709 states and 2104 transitions. Second operand has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:08,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:24:08,541 INFO L93 Difference]: Finished difference Result 3980 states and 4958 transitions. [2021-12-17 04:24:08,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:24:08,542 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 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 231 [2021-12-17 04:24:08,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:24:08,549 INFO L225 Difference]: With dead ends: 3980 [2021-12-17 04:24:08,550 INFO L226 Difference]: Without dead ends: 2457 [2021-12-17 04:24:08,552 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 [2021-12-17 04:24:08,554 INFO L933 BasicCegarLoop]: 313 mSDtfsCounter, 135 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 04:24:08,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 334 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 04:24:08,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2457 states. [2021-12-17 04:24:08,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2457 to 2080. [2021-12-17 04:24:08,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2080 states, 2079 states have (on average 1.227994227994228) internal successors, (2553), 2079 states have internal predecessors, (2553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:08,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2080 states to 2080 states and 2553 transitions. [2021-12-17 04:24:08,591 INFO L78 Accepts]: Start accepts. Automaton has 2080 states and 2553 transitions. Word has length 231 [2021-12-17 04:24:08,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:24:08,593 INFO L470 AbstractCegarLoop]: Abstraction has 2080 states and 2553 transitions. [2021-12-17 04:24:08,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:08,596 INFO L276 IsEmpty]: Start isEmpty. Operand 2080 states and 2553 transitions. [2021-12-17 04:24:08,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-12-17 04:24:08,599 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:24:08,600 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:24:08,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 04:24:08,600 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:24:08,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:24:08,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1440418757, now seen corresponding path program 1 times [2021-12-17 04:24:08,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:24:08,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989292085] [2021-12-17 04:24:08,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:24:08,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:24:08,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:24:08,778 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 165 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:24:08,778 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:24:08,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989292085] [2021-12-17 04:24:08,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989292085] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:24:08,779 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:24:08,779 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 04:24:08,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427902053] [2021-12-17 04:24:08,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:24:08,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:24:08,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:24:08,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:24:08,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:24:08,781 INFO L87 Difference]: Start difference. First operand 2080 states and 2553 transitions. Second operand has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:10,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:24:10,062 INFO L93 Difference]: Finished difference Result 6568 states and 8284 transitions. [2021-12-17 04:24:10,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:24:10,062 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 0 states have call successors, (0), 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 232 [2021-12-17 04:24:10,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:24:10,076 INFO L225 Difference]: With dead ends: 6568 [2021-12-17 04:24:10,077 INFO L226 Difference]: Without dead ends: 4490 [2021-12-17 04:24:10,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:24:10,081 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 334 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1078 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 1379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 1078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-17 04:24:10,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 69 Invalid, 1379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 1078 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-17 04:24:10,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4490 states. [2021-12-17 04:24:10,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4490 to 4112. [2021-12-17 04:24:10,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4112 states, 4111 states have (on average 1.233033325225006) internal successors, (5069), 4111 states have internal predecessors, (5069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:10,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4112 states to 4112 states and 5069 transitions. [2021-12-17 04:24:10,150 INFO L78 Accepts]: Start accepts. Automaton has 4112 states and 5069 transitions. Word has length 232 [2021-12-17 04:24:10,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:24:10,151 INFO L470 AbstractCegarLoop]: Abstraction has 4112 states and 5069 transitions. [2021-12-17 04:24:10,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:10,151 INFO L276 IsEmpty]: Start isEmpty. Operand 4112 states and 5069 transitions. [2021-12-17 04:24:10,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-12-17 04:24:10,170 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:24:10,170 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:24:10,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 04:24:10,170 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:24:10,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:24:10,171 INFO L85 PathProgramCache]: Analyzing trace with hash 826529202, now seen corresponding path program 1 times [2021-12-17 04:24:10,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:24:10,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850927508] [2021-12-17 04:24:10,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:24:10,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:24:10,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:24:10,269 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 161 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:24:10,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:24:10,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850927508] [2021-12-17 04:24:10,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850927508] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:24:10,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:24:10,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:24:10,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987260945] [2021-12-17 04:24:10,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:24:10,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:24:10,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:24:10,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:24:10,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:24:10,272 INFO L87 Difference]: Start difference. First operand 4112 states and 5069 transitions. Second operand has 4 states, 4 states have (on average 60.75) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:11,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:24:11,488 INFO L93 Difference]: Finished difference Result 9151 states and 11475 transitions. [2021-12-17 04:24:11,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:24:11,488 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 60.75) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 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 243 [2021-12-17 04:24:11,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:24:11,504 INFO L225 Difference]: With dead ends: 9151 [2021-12-17 04:24:11,504 INFO L226 Difference]: Without dead ends: 5409 [2021-12-17 04:24:11,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:24:11,509 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 240 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 1317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-17 04:24:11,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 124 Invalid, 1317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-17 04:24:11,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5409 states. [2021-12-17 04:24:11,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5409 to 5220. [2021-12-17 04:24:11,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5220 states, 5219 states have (on average 1.2161333588810117) internal successors, (6347), 5219 states have internal predecessors, (6347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:11,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5220 states to 5220 states and 6347 transitions. [2021-12-17 04:24:11,585 INFO L78 Accepts]: Start accepts. Automaton has 5220 states and 6347 transitions. Word has length 243 [2021-12-17 04:24:11,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:24:11,586 INFO L470 AbstractCegarLoop]: Abstraction has 5220 states and 6347 transitions. [2021-12-17 04:24:11,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.75) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:11,586 INFO L276 IsEmpty]: Start isEmpty. Operand 5220 states and 6347 transitions. [2021-12-17 04:24:11,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2021-12-17 04:24:11,593 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:24:11,593 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:24:11,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 04:24:11,593 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:24:11,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:24:11,594 INFO L85 PathProgramCache]: Analyzing trace with hash -866120349, now seen corresponding path program 1 times [2021-12-17 04:24:11,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:24:11,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346565712] [2021-12-17 04:24:11,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:24:11,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:24:11,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:24:11,733 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2021-12-17 04:24:11,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:24:11,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346565712] [2021-12-17 04:24:11,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346565712] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:24:11,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:24:11,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:24:11,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266854445] [2021-12-17 04:24:11,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:24:11,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:24:11,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:24:11,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:24:11,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:24:11,736 INFO L87 Difference]: Start difference. First operand 5220 states and 6347 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:12,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:24:12,453 INFO L93 Difference]: Finished difference Result 12276 states and 15197 transitions. [2021-12-17 04:24:12,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:24:12,455 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 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 306 [2021-12-17 04:24:12,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:24:12,477 INFO L225 Difference]: With dead ends: 12276 [2021-12-17 04:24:12,478 INFO L226 Difference]: Without dead ends: 7427 [2021-12-17 04:24:12,484 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 [2021-12-17 04:24:12,485 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 170 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 04:24:12,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 158 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 04:24:12,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7427 states. [2021-12-17 04:24:12,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7427 to 4844. [2021-12-17 04:24:12,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4844 states, 4843 states have (on average 1.228370844517861) internal successors, (5949), 4843 states have internal predecessors, (5949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:12,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4844 states to 4844 states and 5949 transitions. [2021-12-17 04:24:12,575 INFO L78 Accepts]: Start accepts. Automaton has 4844 states and 5949 transitions. Word has length 306 [2021-12-17 04:24:12,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:24:12,576 INFO L470 AbstractCegarLoop]: Abstraction has 4844 states and 5949 transitions. [2021-12-17 04:24:12,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 3 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:12,576 INFO L276 IsEmpty]: Start isEmpty. Operand 4844 states and 5949 transitions. [2021-12-17 04:24:12,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2021-12-17 04:24:12,583 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:24:12,583 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:24:12,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 04:24:12,584 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:24:12,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:24:12,584 INFO L85 PathProgramCache]: Analyzing trace with hash 199039917, now seen corresponding path program 1 times [2021-12-17 04:24:12,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:24:12,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137366530] [2021-12-17 04:24:12,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:24:12,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:24:12,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:24:12,692 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 292 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-17 04:24:12,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:24:12,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137366530] [2021-12-17 04:24:12,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137366530] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:24:12,693 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:24:12,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:24:12,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606642960] [2021-12-17 04:24:12,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:24:12,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:24:12,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:24:12,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:24:12,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:24:12,695 INFO L87 Difference]: Start difference. First operand 4844 states and 5949 transitions. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:13,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:24:13,362 INFO L93 Difference]: Finished difference Result 11340 states and 14290 transitions. [2021-12-17 04:24:13,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:24:13,363 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 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 310 [2021-12-17 04:24:13,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:24:13,384 INFO L225 Difference]: With dead ends: 11340 [2021-12-17 04:24:13,384 INFO L226 Difference]: Without dead ends: 6867 [2021-12-17 04:24:13,391 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 [2021-12-17 04:24:13,391 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 164 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 04:24:13,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 149 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 04:24:13,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6867 states. [2021-12-17 04:24:13,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6867 to 5209. [2021-12-17 04:24:13,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5209 states, 5208 states have (on average 1.2238863287250383) internal successors, (6374), 5208 states have internal predecessors, (6374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:13,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5209 states to 5209 states and 6374 transitions. [2021-12-17 04:24:13,484 INFO L78 Accepts]: Start accepts. Automaton has 5209 states and 6374 transitions. Word has length 310 [2021-12-17 04:24:13,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:24:13,485 INFO L470 AbstractCegarLoop]: Abstraction has 5209 states and 6374 transitions. [2021-12-17 04:24:13,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:13,485 INFO L276 IsEmpty]: Start isEmpty. Operand 5209 states and 6374 transitions. [2021-12-17 04:24:13,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2021-12-17 04:24:13,491 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:24:13,491 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:24:13,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 04:24:13,492 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:24:13,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:24:13,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1264539535, now seen corresponding path program 1 times [2021-12-17 04:24:13,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:24:13,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892203660] [2021-12-17 04:24:13,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:24:13,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:24:13,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:24:13,602 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 307 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-17 04:24:13,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:24:13,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892203660] [2021-12-17 04:24:13,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892203660] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:24:13,603 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:24:13,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:24:13,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033665940] [2021-12-17 04:24:13,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:24:13,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:24:13,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:24:13,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:24:13,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:24:13,605 INFO L87 Difference]: Start difference. First operand 5209 states and 6374 transitions. Second operand has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:14,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:24:14,287 INFO L93 Difference]: Finished difference Result 12270 states and 15237 transitions. [2021-12-17 04:24:14,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:24:14,290 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 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 310 [2021-12-17 04:24:14,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:24:14,302 INFO L225 Difference]: With dead ends: 12270 [2021-12-17 04:24:14,302 INFO L226 Difference]: Without dead ends: 7431 [2021-12-17 04:24:14,310 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 [2021-12-17 04:24:14,310 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 140 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 04:24:14,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 140 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 04:24:14,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7431 states. [2021-12-17 04:24:14,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7431 to 7426. [2021-12-17 04:24:14,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7426 states, 7425 states have (on average 1.2134680134680134) internal successors, (9010), 7425 states have internal predecessors, (9010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:14,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7426 states to 7426 states and 9010 transitions. [2021-12-17 04:24:14,416 INFO L78 Accepts]: Start accepts. Automaton has 7426 states and 9010 transitions. Word has length 310 [2021-12-17 04:24:14,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:24:14,417 INFO L470 AbstractCegarLoop]: Abstraction has 7426 states and 9010 transitions. [2021-12-17 04:24:14,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 3 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:14,417 INFO L276 IsEmpty]: Start isEmpty. Operand 7426 states and 9010 transitions. [2021-12-17 04:24:14,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2021-12-17 04:24:14,424 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:24:14,425 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:24:14,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 04:24:14,425 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:24:14,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:24:14,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1224254456, now seen corresponding path program 1 times [2021-12-17 04:24:14,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:24:14,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647097732] [2021-12-17 04:24:14,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:24:14,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:24:14,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:24:14,554 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 356 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:24:14,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:24:14,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647097732] [2021-12-17 04:24:14,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647097732] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:24:14,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:24:14,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 04:24:14,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298629715] [2021-12-17 04:24:14,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:24:14,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:24:14,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:24:14,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:24:14,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:24:14,557 INFO L87 Difference]: Start difference. First operand 7426 states and 9010 transitions. Second operand has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:15,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:24:15,640 INFO L93 Difference]: Finished difference Result 17437 states and 21174 transitions. [2021-12-17 04:24:15,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:24:15,641 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 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 320 [2021-12-17 04:24:15,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:24:15,657 INFO L225 Difference]: With dead ends: 17437 [2021-12-17 04:24:15,658 INFO L226 Difference]: Without dead ends: 10381 [2021-12-17 04:24:15,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:24:15,667 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 293 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 04:24:15,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 92 Invalid, 1323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 1116 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 04:24:15,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10381 states. [2021-12-17 04:24:15,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10381 to 10191. [2021-12-17 04:24:15,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10191 states, 10190 states have (on average 1.1882237487733072) internal successors, (12108), 10190 states have internal predecessors, (12108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:15,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10191 states to 10191 states and 12108 transitions. [2021-12-17 04:24:15,836 INFO L78 Accepts]: Start accepts. Automaton has 10191 states and 12108 transitions. Word has length 320 [2021-12-17 04:24:15,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:24:15,837 INFO L470 AbstractCegarLoop]: Abstraction has 10191 states and 12108 transitions. [2021-12-17 04:24:15,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:15,838 INFO L276 IsEmpty]: Start isEmpty. Operand 10191 states and 12108 transitions. [2021-12-17 04:24:15,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2021-12-17 04:24:15,846 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:24:15,847 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:24:15,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 04:24:15,847 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:24:15,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:24:15,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1307273767, now seen corresponding path program 1 times [2021-12-17 04:24:15,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:24:15,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429046542] [2021-12-17 04:24:15,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:24:15,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:24:15,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:24:15,996 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 303 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:24:15,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:24:15,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429046542] [2021-12-17 04:24:15,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429046542] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:24:15,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686988474] [2021-12-17 04:24:15,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:24:15,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:24:15,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:24:16,003 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 04:24:16,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 04:24:16,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:24:16,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 04:24:16,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:24:16,921 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 283 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2021-12-17 04:24:16,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:24:16,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686988474] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:24:16,921 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:24:16,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-17 04:24:16,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637930141] [2021-12-17 04:24:16,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:24:16,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:24:16,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:24:16,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:24:16,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-17 04:24:16,923 INFO L87 Difference]: Start difference. First operand 10191 states and 12108 transitions. Second operand has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:17,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:24:17,565 INFO L93 Difference]: Finished difference Result 20382 states and 24216 transitions. [2021-12-17 04:24:17,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:24:17,566 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 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 322 [2021-12-17 04:24:17,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:24:17,584 INFO L225 Difference]: With dead ends: 20382 [2021-12-17 04:24:17,584 INFO L226 Difference]: Without dead ends: 10561 [2021-12-17 04:24:17,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-17 04:24:17,595 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 130 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 04:24:17,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 167 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 04:24:17,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10561 states. [2021-12-17 04:24:17,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10561 to 10375. [2021-12-17 04:24:17,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10375 states, 10374 states have (on average 1.1773664931559669) internal successors, (12214), 10374 states have internal predecessors, (12214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:17,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10375 states to 10375 states and 12214 transitions. [2021-12-17 04:24:17,719 INFO L78 Accepts]: Start accepts. Automaton has 10375 states and 12214 transitions. Word has length 322 [2021-12-17 04:24:17,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:24:17,720 INFO L470 AbstractCegarLoop]: Abstraction has 10375 states and 12214 transitions. [2021-12-17 04:24:17,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:17,720 INFO L276 IsEmpty]: Start isEmpty. Operand 10375 states and 12214 transitions. [2021-12-17 04:24:17,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2021-12-17 04:24:17,725 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:24:17,725 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:24:17,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 04:24:17,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-17 04:24:17,948 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:24:17,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:24:17,948 INFO L85 PathProgramCache]: Analyzing trace with hash -379447870, now seen corresponding path program 1 times [2021-12-17 04:24:17,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:24:17,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061458841] [2021-12-17 04:24:17,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:24:17,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:24:18,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:24:18,126 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 227 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:24:18,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:24:18,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061458841] [2021-12-17 04:24:18,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061458841] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:24:18,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452213050] [2021-12-17 04:24:18,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:24:18,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:24:18,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:24:18,129 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 04:24:18,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 04:24:18,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:24:18,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 04:24:18,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:24:18,832 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 283 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-17 04:24:18,832 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:24:18,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452213050] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:24:18,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:24:18,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-17 04:24:18,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337004344] [2021-12-17 04:24:18,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:24:18,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:24:18,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:24:18,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:24:18,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-17 04:24:18,834 INFO L87 Difference]: Start difference. First operand 10375 states and 12214 transitions. Second operand has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:19,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:24:19,515 INFO L93 Difference]: Finished difference Result 21318 states and 25225 transitions. [2021-12-17 04:24:19,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:24:19,516 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 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 324 [2021-12-17 04:24:19,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:24:19,532 INFO L225 Difference]: With dead ends: 21318 [2021-12-17 04:24:19,532 INFO L226 Difference]: Without dead ends: 11313 [2021-12-17 04:24:19,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-17 04:24:19,545 INFO L933 BasicCegarLoop]: 334 mSDtfsCounter, 131 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 04:24:19,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 355 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 04:24:19,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11313 states. [2021-12-17 04:24:19,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11313 to 11309. [2021-12-17 04:24:19,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11309 states, 11308 states have (on average 1.1711177927131236) internal successors, (13243), 11308 states have internal predecessors, (13243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:19,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11309 states to 11309 states and 13243 transitions. [2021-12-17 04:24:19,678 INFO L78 Accepts]: Start accepts. Automaton has 11309 states and 13243 transitions. Word has length 324 [2021-12-17 04:24:19,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:24:19,678 INFO L470 AbstractCegarLoop]: Abstraction has 11309 states and 13243 transitions. [2021-12-17 04:24:19,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:19,679 INFO L276 IsEmpty]: Start isEmpty. Operand 11309 states and 13243 transitions. [2021-12-17 04:24:19,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2021-12-17 04:24:19,684 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:24:19,684 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:24:19,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 04:24:19,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-17 04:24:19,901 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:24:19,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:24:19,901 INFO L85 PathProgramCache]: Analyzing trace with hash 234214298, now seen corresponding path program 1 times [2021-12-17 04:24:19,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:24:19,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416514119] [2021-12-17 04:24:19,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:24:19,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:24:19,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:24:20,083 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-12-17 04:24:20,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:24:20,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416514119] [2021-12-17 04:24:20,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416514119] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:24:20,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:24:20,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:24:20,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054233535] [2021-12-17 04:24:20,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:24:20,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:24:20,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:24:20,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:24:20,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:24:20,086 INFO L87 Difference]: Start difference. First operand 11309 states and 13243 transitions. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 2 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:20,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:24:20,471 INFO L93 Difference]: Finished difference Result 21684 states and 25460 transitions. [2021-12-17 04:24:20,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:24:20,471 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 2 states have internal predecessors, (210), 0 states have call successors, (0), 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 333 [2021-12-17 04:24:20,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:24:20,482 INFO L225 Difference]: With dead ends: 21684 [2021-12-17 04:24:20,482 INFO L226 Difference]: Without dead ends: 10745 [2021-12-17 04:24:20,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:24:20,492 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 189 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 04:24:20,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 40 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 04:24:20,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10745 states. [2021-12-17 04:24:20,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10745 to 10743. [2021-12-17 04:24:20,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10743 states, 10742 states have (on average 1.1723142803947124) internal successors, (12593), 10742 states have internal predecessors, (12593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:20,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10743 states to 10743 states and 12593 transitions. [2021-12-17 04:24:20,605 INFO L78 Accepts]: Start accepts. Automaton has 10743 states and 12593 transitions. Word has length 333 [2021-12-17 04:24:20,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:24:20,605 INFO L470 AbstractCegarLoop]: Abstraction has 10743 states and 12593 transitions. [2021-12-17 04:24:20,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 2 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:20,606 INFO L276 IsEmpty]: Start isEmpty. Operand 10743 states and 12593 transitions. [2021-12-17 04:24:20,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2021-12-17 04:24:20,611 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:24:20,611 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:24:20,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 04:24:20,612 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:24:20,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:24:20,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1309922959, now seen corresponding path program 1 times [2021-12-17 04:24:20,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:24:20,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830278695] [2021-12-17 04:24:20,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:24:20,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:24:20,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:24:20,765 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 281 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-12-17 04:24:20,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:24:20,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830278695] [2021-12-17 04:24:20,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830278695] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:24:20,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:24:20,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:24:20,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004830590] [2021-12-17 04:24:20,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:24:20,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:24:20,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:24:20,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:24:20,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:24:20,767 INFO L87 Difference]: Start difference. First operand 10743 states and 12593 transitions. Second operand has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:21,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:24:21,430 INFO L93 Difference]: Finished difference Result 24244 states and 28275 transitions. [2021-12-17 04:24:21,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:24:21,430 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 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 357 [2021-12-17 04:24:21,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:24:21,440 INFO L225 Difference]: With dead ends: 24244 [2021-12-17 04:24:21,441 INFO L226 Difference]: Without dead ends: 12212 [2021-12-17 04:24:21,447 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 [2021-12-17 04:24:21,448 INFO L933 BasicCegarLoop]: 306 mSDtfsCounter, 148 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 04:24:21,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 321 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 04:24:21,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12212 states. [2021-12-17 04:24:21,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12212 to 10179. [2021-12-17 04:24:21,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10179 states, 10178 states have (on average 1.125171939477304) internal successors, (11452), 10178 states have internal predecessors, (11452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:21,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10179 states to 10179 states and 11452 transitions. [2021-12-17 04:24:21,619 INFO L78 Accepts]: Start accepts. Automaton has 10179 states and 11452 transitions. Word has length 357 [2021-12-17 04:24:21,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:24:21,619 INFO L470 AbstractCegarLoop]: Abstraction has 10179 states and 11452 transitions. [2021-12-17 04:24:21,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:21,620 INFO L276 IsEmpty]: Start isEmpty. Operand 10179 states and 11452 transitions. [2021-12-17 04:24:21,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2021-12-17 04:24:21,625 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:24:21,625 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:24:21,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 04:24:21,626 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:24:21,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:24:21,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1965772471, now seen corresponding path program 1 times [2021-12-17 04:24:21,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:24:21,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669366710] [2021-12-17 04:24:21,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:24:21,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:24:21,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:24:21,748 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 283 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-12-17 04:24:21,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:24:21,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669366710] [2021-12-17 04:24:21,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669366710] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:24:21,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:24:21,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 04:24:21,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952207105] [2021-12-17 04:24:21,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:24:21,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:24:21,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:24:21,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:24:21,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:24:21,751 INFO L87 Difference]: Start difference. First operand 10179 states and 11452 transitions. Second operand has 4 states, 4 states have (on average 62.25) internal successors, (249), 4 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:22,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:24:22,752 INFO L93 Difference]: Finished difference Result 22394 states and 25231 transitions. [2021-12-17 04:24:22,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:24:22,753 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 62.25) internal successors, (249), 4 states have internal predecessors, (249), 0 states have call successors, (0), 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 359 [2021-12-17 04:24:22,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:24:22,761 INFO L225 Difference]: With dead ends: 22394 [2021-12-17 04:24:22,761 INFO L226 Difference]: Without dead ends: 12401 [2021-12-17 04:24:22,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:24:22,765 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 312 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 1281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 04:24:22,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 103 Invalid, 1281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1083 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 04:24:22,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12401 states. [2021-12-17 04:24:22,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12401 to 11287. [2021-12-17 04:24:22,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11287 states, 11286 states have (on average 1.1281233386496545) internal successors, (12732), 11286 states have internal predecessors, (12732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:22,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11287 states to 11287 states and 12732 transitions. [2021-12-17 04:24:22,859 INFO L78 Accepts]: Start accepts. Automaton has 11287 states and 12732 transitions. Word has length 359 [2021-12-17 04:24:22,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:24:22,860 INFO L470 AbstractCegarLoop]: Abstraction has 11287 states and 12732 transitions. [2021-12-17 04:24:22,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.25) internal successors, (249), 4 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:22,860 INFO L276 IsEmpty]: Start isEmpty. Operand 11287 states and 12732 transitions. [2021-12-17 04:24:22,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2021-12-17 04:24:22,866 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:24:22,866 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:24:22,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 04:24:22,866 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:24:22,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:24:22,867 INFO L85 PathProgramCache]: Analyzing trace with hash 2109275467, now seen corresponding path program 1 times [2021-12-17 04:24:22,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:24:22,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550166811] [2021-12-17 04:24:22,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:24:22,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:24:22,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:24:22,992 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 146 proven. 153 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-12-17 04:24:22,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:24:22,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550166811] [2021-12-17 04:24:22,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550166811] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:24:22,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798022231] [2021-12-17 04:24:22,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:24:22,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:24:22,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:24:22,994 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 04:24:23,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 04:24:23,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:24:23,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 04:24:23,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:24:23,969 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 299 proven. 0 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-12-17 04:24:23,969 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:24:23,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798022231] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:24:23,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:24:23,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-17 04:24:23,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508300994] [2021-12-17 04:24:23,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:24:23,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:24:23,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:24:23,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:24:23,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-17 04:24:23,972 INFO L87 Difference]: Start difference. First operand 11287 states and 12732 transitions. Second operand has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:24,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:24:24,673 INFO L93 Difference]: Finished difference Result 22391 states and 25297 transitions. [2021-12-17 04:24:24,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:24:24,673 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 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 367 [2021-12-17 04:24:24,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:24:24,684 INFO L225 Difference]: With dead ends: 22391 [2021-12-17 04:24:24,684 INFO L226 Difference]: Without dead ends: 11474 [2021-12-17 04:24:24,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 366 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-17 04:24:24,691 INFO L933 BasicCegarLoop]: 332 mSDtfsCounter, 111 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 04:24:24,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 352 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 04:24:24,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11474 states. [2021-12-17 04:24:24,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11474 to 11471. [2021-12-17 04:24:24,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11471 states, 11470 states have (on average 1.1242371403661726) internal successors, (12895), 11470 states have internal predecessors, (12895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:24,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11471 states to 11471 states and 12895 transitions. [2021-12-17 04:24:24,846 INFO L78 Accepts]: Start accepts. Automaton has 11471 states and 12895 transitions. Word has length 367 [2021-12-17 04:24:24,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:24:24,846 INFO L470 AbstractCegarLoop]: Abstraction has 11471 states and 12895 transitions. [2021-12-17 04:24:24,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:24,847 INFO L276 IsEmpty]: Start isEmpty. Operand 11471 states and 12895 transitions. [2021-12-17 04:24:24,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2021-12-17 04:24:24,853 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:24:24,854 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:24:24,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-17 04:24:25,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:24:25,064 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:24:25,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:24:25,064 INFO L85 PathProgramCache]: Analyzing trace with hash 827224776, now seen corresponding path program 1 times [2021-12-17 04:24:25,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:24:25,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189133647] [2021-12-17 04:24:25,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:24:25,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:24:25,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:24:25,190 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 344 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-17 04:24:25,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:24:25,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189133647] [2021-12-17 04:24:25,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189133647] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:24:25,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:24:25,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:24:25,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277850178] [2021-12-17 04:24:25,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:24:25,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:24:25,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:24:25,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:24:25,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:24:25,192 INFO L87 Difference]: Start difference. First operand 11471 states and 12895 transitions. Second operand has 4 states, 4 states have (on average 73.0) internal successors, (292), 3 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:26,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:24:26,170 INFO L93 Difference]: Finished difference Result 30691 states and 34592 transitions. [2021-12-17 04:24:26,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:24:26,171 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 73.0) internal successors, (292), 3 states have internal predecessors, (292), 0 states have call successors, (0), 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 372 [2021-12-17 04:24:26,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:24:26,189 INFO L225 Difference]: With dead ends: 30691 [2021-12-17 04:24:26,189 INFO L226 Difference]: Without dead ends: 18854 [2021-12-17 04:24:26,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:24:26,200 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 233 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 1050 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 1156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 04:24:26,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 80 Invalid, 1156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1050 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 04:24:26,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18854 states. [2021-12-17 04:24:26,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18854 to 18483. [2021-12-17 04:24:26,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18483 states, 18482 states have (on average 1.1217400714208419) internal successors, (20732), 18482 states have internal predecessors, (20732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:26,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18483 states to 18483 states and 20732 transitions. [2021-12-17 04:24:26,426 INFO L78 Accepts]: Start accepts. Automaton has 18483 states and 20732 transitions. Word has length 372 [2021-12-17 04:24:26,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:24:26,426 INFO L470 AbstractCegarLoop]: Abstraction has 18483 states and 20732 transitions. [2021-12-17 04:24:26,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 73.0) internal successors, (292), 3 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:26,426 INFO L276 IsEmpty]: Start isEmpty. Operand 18483 states and 20732 transitions. [2021-12-17 04:24:26,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2021-12-17 04:24:26,431 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:24:26,432 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:24:26,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-17 04:24:26,432 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:24:26,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:24:26,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1553293930, now seen corresponding path program 1 times [2021-12-17 04:24:26,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:24:26,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959013534] [2021-12-17 04:24:26,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:24:26,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:24:26,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:24:26,562 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 146 proven. 200 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-12-17 04:24:26,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:24:26,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959013534] [2021-12-17 04:24:26,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959013534] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:24:26,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006383272] [2021-12-17 04:24:26,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:24:26,563 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:24:26,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:24:26,564 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 04:24:26,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 04:24:26,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:24:26,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-17 04:24:26,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:24:28,537 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 244 proven. 179 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:24:28,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 04:24:32,027 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 244 proven. 179 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:24:32,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006383272] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 04:24:32,028 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 04:24:32,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 11 [2021-12-17 04:24:32,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884123007] [2021-12-17 04:24:32,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 04:24:32,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 04:24:32,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:24:32,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 04:24:32,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-12-17 04:24:32,031 INFO L87 Difference]: Start difference. First operand 18483 states and 20732 transitions. Second operand has 12 states, 12 states have (on average 76.16666666666667) internal successors, (914), 11 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:38,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:24:38,164 INFO L93 Difference]: Finished difference Result 57485 states and 64105 transitions. [2021-12-17 04:24:38,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-12-17 04:24:38,165 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 76.16666666666667) internal successors, (914), 11 states have internal predecessors, (914), 0 states have call successors, (0), 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 389 [2021-12-17 04:24:38,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:24:38,201 INFO L225 Difference]: With dead ends: 57485 [2021-12-17 04:24:38,201 INFO L226 Difference]: Without dead ends: 39188 [2021-12-17 04:24:38,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 811 GetRequests, 769 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=499, Invalid=1307, Unknown=0, NotChecked=0, Total=1806 [2021-12-17 04:24:38,215 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 4189 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 7392 mSolverCounterSat, 1867 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4189 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 9259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1867 IncrementalHoareTripleChecker+Valid, 7392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-12-17 04:24:38,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4189 Valid, 217 Invalid, 9259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1867 Valid, 7392 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2021-12-17 04:24:38,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39188 states. [2021-12-17 04:24:38,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39188 to 20319. [2021-12-17 04:24:38,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20319 states, 20318 states have (on average 1.11049315877547) internal successors, (22563), 20318 states have internal predecessors, (22563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:38,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20319 states to 20319 states and 22563 transitions. [2021-12-17 04:24:38,470 INFO L78 Accepts]: Start accepts. Automaton has 20319 states and 22563 transitions. Word has length 389 [2021-12-17 04:24:38,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:24:38,471 INFO L470 AbstractCegarLoop]: Abstraction has 20319 states and 22563 transitions. [2021-12-17 04:24:38,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 76.16666666666667) internal successors, (914), 11 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:38,471 INFO L276 IsEmpty]: Start isEmpty. Operand 20319 states and 22563 transitions. [2021-12-17 04:24:38,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2021-12-17 04:24:38,477 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:24:38,477 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:24:38,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 04:24:38,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:24:38,678 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:24:38,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:24:38,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1546004851, now seen corresponding path program 1 times [2021-12-17 04:24:38,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:24:38,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046939890] [2021-12-17 04:24:38,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:24:38,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:24:38,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:24:38,821 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2021-12-17 04:24:38,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:24:38,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046939890] [2021-12-17 04:24:38,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046939890] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:24:38,822 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:24:38,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:24:38,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379388603] [2021-12-17 04:24:38,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:24:38,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:24:38,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:24:38,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:24:38,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:24:38,825 INFO L87 Difference]: Start difference. First operand 20319 states and 22563 transitions. Second operand has 4 states, 4 states have (on average 57.25) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:39,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:24:39,862 INFO L93 Difference]: Finished difference Result 42302 states and 46913 transitions. [2021-12-17 04:24:39,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:24:39,867 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 57.25) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 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 394 [2021-12-17 04:24:39,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:24:39,887 INFO L225 Difference]: With dead ends: 42302 [2021-12-17 04:24:39,888 INFO L226 Difference]: Without dead ends: 22169 [2021-12-17 04:24:39,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:24:39,895 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 221 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 04:24:39,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 106 Invalid, 1246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 972 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 04:24:39,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22169 states. [2021-12-17 04:24:40,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22169 to 19577. [2021-12-17 04:24:40,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19577 states, 19576 states have (on average 1.1092664487127095) internal successors, (21715), 19576 states have internal predecessors, (21715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:40,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19577 states to 19577 states and 21715 transitions. [2021-12-17 04:24:40,085 INFO L78 Accepts]: Start accepts. Automaton has 19577 states and 21715 transitions. Word has length 394 [2021-12-17 04:24:40,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:24:40,085 INFO L470 AbstractCegarLoop]: Abstraction has 19577 states and 21715 transitions. [2021-12-17 04:24:40,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.25) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:40,085 INFO L276 IsEmpty]: Start isEmpty. Operand 19577 states and 21715 transitions. [2021-12-17 04:24:40,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2021-12-17 04:24:40,094 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:24:40,094 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:24:40,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-17 04:24:40,095 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:24:40,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:24:40,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1148113260, now seen corresponding path program 1 times [2021-12-17 04:24:40,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:24:40,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438805141] [2021-12-17 04:24:40,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:24:40,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:24:40,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:24:40,233 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2021-12-17 04:24:40,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:24:40,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438805141] [2021-12-17 04:24:40,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438805141] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:24:40,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:24:40,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:24:40,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113873165] [2021-12-17 04:24:40,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:24:40,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:24:40,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:24:40,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:24:40,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:24:40,235 INFO L87 Difference]: Start difference. First operand 19577 states and 21715 transitions. Second operand has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:40,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:24:40,816 INFO L93 Difference]: Finished difference Result 40992 states and 45431 transitions. [2021-12-17 04:24:40,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:24:40,816 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 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 434 [2021-12-17 04:24:40,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:24:40,835 INFO L225 Difference]: With dead ends: 40992 [2021-12-17 04:24:40,835 INFO L226 Difference]: Without dead ends: 21601 [2021-12-17 04:24:40,847 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 [2021-12-17 04:24:40,847 INFO L933 BasicCegarLoop]: 291 mSDtfsCounter, 158 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 04:24:40,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 309 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 04:24:40,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21601 states. [2021-12-17 04:24:41,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21601 to 16441. [2021-12-17 04:24:41,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16441 states, 16440 states have (on average 1.1034671532846716) internal successors, (18141), 16440 states have internal predecessors, (18141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:41,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16441 states to 16441 states and 18141 transitions. [2021-12-17 04:24:41,055 INFO L78 Accepts]: Start accepts. Automaton has 16441 states and 18141 transitions. Word has length 434 [2021-12-17 04:24:41,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:24:41,056 INFO L470 AbstractCegarLoop]: Abstraction has 16441 states and 18141 transitions. [2021-12-17 04:24:41,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:41,056 INFO L276 IsEmpty]: Start isEmpty. Operand 16441 states and 18141 transitions. [2021-12-17 04:24:41,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2021-12-17 04:24:41,063 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:24:41,063 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:24:41,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-17 04:24:41,064 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:24:41,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:24:41,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1848032332, now seen corresponding path program 1 times [2021-12-17 04:24:41,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:24:41,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687553645] [2021-12-17 04:24:41,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:24:41,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:24:41,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:24:41,192 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 608 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-12-17 04:24:41,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:24:41,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687553645] [2021-12-17 04:24:41,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687553645] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:24:41,193 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:24:41,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:24:41,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149056798] [2021-12-17 04:24:41,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:24:41,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:24:41,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:24:41,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:24:41,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:24:41,195 INFO L87 Difference]: Start difference. First operand 16441 states and 18141 transitions. Second operand has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:41,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:24:41,757 INFO L93 Difference]: Finished difference Result 33627 states and 37112 transitions. [2021-12-17 04:24:41,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:24:41,757 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 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 468 [2021-12-17 04:24:41,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:24:41,775 INFO L225 Difference]: With dead ends: 33627 [2021-12-17 04:24:41,775 INFO L226 Difference]: Without dead ends: 17556 [2021-12-17 04:24:41,784 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 [2021-12-17 04:24:41,785 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 134 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 04:24:41,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 106 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 04:24:41,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17556 states. [2021-12-17 04:24:41,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17556 to 16073. [2021-12-17 04:24:41,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16073 states, 16072 states have (on average 1.1025385764061721) internal successors, (17720), 16072 states have internal predecessors, (17720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:41,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16073 states to 16073 states and 17720 transitions. [2021-12-17 04:24:41,932 INFO L78 Accepts]: Start accepts. Automaton has 16073 states and 17720 transitions. Word has length 468 [2021-12-17 04:24:41,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:24:41,932 INFO L470 AbstractCegarLoop]: Abstraction has 16073 states and 17720 transitions. [2021-12-17 04:24:41,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:41,932 INFO L276 IsEmpty]: Start isEmpty. Operand 16073 states and 17720 transitions. [2021-12-17 04:24:41,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2021-12-17 04:24:41,944 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:24:41,944 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:24:41,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-17 04:24:41,944 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:24:41,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:24:41,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1735240278, now seen corresponding path program 1 times [2021-12-17 04:24:41,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:24:41,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321013742] [2021-12-17 04:24:41,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:24:41,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:24:42,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:24:42,218 INFO L134 CoverageAnalysis]: Checked inductivity of 851 backedges. 312 proven. 434 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-12-17 04:24:42,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:24:42,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321013742] [2021-12-17 04:24:42,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321013742] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:24:42,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378872673] [2021-12-17 04:24:42,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:24:42,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:24:42,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:24:42,221 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 04:24:42,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 04:24:42,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:24:42,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 04:24:42,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:24:43,059 INFO L134 CoverageAnalysis]: Checked inductivity of 851 backedges. 697 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-12-17 04:24:43,060 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:24:43,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378872673] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:24:43,060 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:24:43,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-17 04:24:43,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518132347] [2021-12-17 04:24:43,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:24:43,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:24:43,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:24:43,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:24:43,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 04:24:43,062 INFO L87 Difference]: Start difference. First operand 16073 states and 17720 transitions. Second operand has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:43,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:24:43,638 INFO L93 Difference]: Finished difference Result 32517 states and 35828 transitions. [2021-12-17 04:24:43,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:24:43,639 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 513 [2021-12-17 04:24:43,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:24:43,657 INFO L225 Difference]: With dead ends: 32517 [2021-12-17 04:24:43,657 INFO L226 Difference]: Without dead ends: 16630 [2021-12-17 04:24:43,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 512 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 04:24:43,667 INFO L933 BasicCegarLoop]: 330 mSDtfsCounter, 67 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 04:24:43,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 348 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 04:24:43,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16630 states. [2021-12-17 04:24:43,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16630 to 15705. [2021-12-17 04:24:43,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15705 states, 15704 states have (on average 1.0944982170147732) internal successors, (17188), 15704 states have internal predecessors, (17188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:43,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15705 states to 15705 states and 17188 transitions. [2021-12-17 04:24:43,814 INFO L78 Accepts]: Start accepts. Automaton has 15705 states and 17188 transitions. Word has length 513 [2021-12-17 04:24:43,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:24:43,814 INFO L470 AbstractCegarLoop]: Abstraction has 15705 states and 17188 transitions. [2021-12-17 04:24:43,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:43,814 INFO L276 IsEmpty]: Start isEmpty. Operand 15705 states and 17188 transitions. [2021-12-17 04:24:43,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 518 [2021-12-17 04:24:43,822 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:24:43,822 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:24:43,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 04:24:44,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-17 04:24:44,023 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:24:44,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:24:44,024 INFO L85 PathProgramCache]: Analyzing trace with hash 661340854, now seen corresponding path program 1 times [2021-12-17 04:24:44,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:24:44,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774074608] [2021-12-17 04:24:44,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:24:44,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:24:44,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:24:44,197 INFO L134 CoverageAnalysis]: Checked inductivity of 591 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 445 trivial. 0 not checked. [2021-12-17 04:24:44,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:24:44,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774074608] [2021-12-17 04:24:44,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774074608] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:24:44,197 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:24:44,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:24:44,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515140069] [2021-12-17 04:24:44,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:24:44,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:24:44,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:24:44,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:24:44,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:24:44,199 INFO L87 Difference]: Start difference. First operand 15705 states and 17188 transitions. Second operand has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:44,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:24:44,741 INFO L93 Difference]: Finished difference Result 31405 states and 34386 transitions. [2021-12-17 04:24:44,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:24:44,742 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 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 517 [2021-12-17 04:24:44,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:24:44,757 INFO L225 Difference]: With dead ends: 31405 [2021-12-17 04:24:44,757 INFO L226 Difference]: Without dead ends: 16070 [2021-12-17 04:24:44,765 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 [2021-12-17 04:24:44,766 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 151 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 04:24:44,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 125 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-17 04:24:44,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16070 states. [2021-12-17 04:24:44,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16070 to 15699. [2021-12-17 04:24:44,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15699 states, 15698 states have (on average 1.0869537520703274) internal successors, (17063), 15698 states have internal predecessors, (17063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:44,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15699 states to 15699 states and 17063 transitions. [2021-12-17 04:24:44,942 INFO L78 Accepts]: Start accepts. Automaton has 15699 states and 17063 transitions. Word has length 517 [2021-12-17 04:24:44,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:24:44,942 INFO L470 AbstractCegarLoop]: Abstraction has 15699 states and 17063 transitions. [2021-12-17 04:24:44,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:44,943 INFO L276 IsEmpty]: Start isEmpty. Operand 15699 states and 17063 transitions. [2021-12-17 04:24:44,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2021-12-17 04:24:44,949 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:24:44,950 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:24:44,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-17 04:24:44,950 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:24:44,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:24:44,950 INFO L85 PathProgramCache]: Analyzing trace with hash 2131901513, now seen corresponding path program 1 times [2021-12-17 04:24:44,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:24:44,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317181235] [2021-12-17 04:24:44,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:24:44,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:24:45,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:24:45,246 INFO L134 CoverageAnalysis]: Checked inductivity of 779 backedges. 599 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-12-17 04:24:45,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:24:45,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317181235] [2021-12-17 04:24:45,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317181235] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:24:45,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:24:45,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 04:24:45,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684198547] [2021-12-17 04:24:45,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:24:45,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 04:24:45,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:24:45,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 04:24:45,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-17 04:24:45,249 INFO L87 Difference]: Start difference. First operand 15699 states and 17063 transitions. Second operand has 7 states, 7 states have (on average 56.285714285714285) internal successors, (394), 6 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:46,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:24:46,513 INFO L93 Difference]: Finished difference Result 36690 states and 39741 transitions. [2021-12-17 04:24:46,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 04:24:46,513 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 56.285714285714285) internal successors, (394), 6 states have internal predecessors, (394), 0 states have call successors, (0), 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 523 [2021-12-17 04:24:46,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:24:46,534 INFO L225 Difference]: With dead ends: 36690 [2021-12-17 04:24:46,535 INFO L226 Difference]: Without dead ends: 21361 [2021-12-17 04:24:46,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-17 04:24:46,547 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 285 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1814 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 1972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 1814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-17 04:24:46,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 191 Invalid, 1972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 1814 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-17 04:24:46,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21361 states. [2021-12-17 04:24:46,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21361 to 16989. [2021-12-17 04:24:46,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16989 states, 16988 states have (on average 1.0867082646574053) internal successors, (18461), 16988 states have internal predecessors, (18461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:46,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16989 states to 16989 states and 18461 transitions. [2021-12-17 04:24:46,739 INFO L78 Accepts]: Start accepts. Automaton has 16989 states and 18461 transitions. Word has length 523 [2021-12-17 04:24:46,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:24:46,739 INFO L470 AbstractCegarLoop]: Abstraction has 16989 states and 18461 transitions. [2021-12-17 04:24:46,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.285714285714285) internal successors, (394), 6 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:46,739 INFO L276 IsEmpty]: Start isEmpty. Operand 16989 states and 18461 transitions. [2021-12-17 04:24:46,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 534 [2021-12-17 04:24:46,746 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:24:46,746 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:24:46,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-17 04:24:46,746 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:24:46,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:24:46,747 INFO L85 PathProgramCache]: Analyzing trace with hash 435204898, now seen corresponding path program 1 times [2021-12-17 04:24:46,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:24:46,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028412820] [2021-12-17 04:24:46,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:24:46,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:24:46,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:24:47,076 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 606 proven. 8 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-12-17 04:24:47,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:24:47,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028412820] [2021-12-17 04:24:47,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028412820] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:24:47,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387479712] [2021-12-17 04:24:47,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:24:47,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:24:47,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:24:47,078 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 04:24:47,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 04:24:47,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:24:47,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 711 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 04:24:47,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:24:48,902 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 493 proven. 121 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-12-17 04:24:48,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 04:24:52,361 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 493 proven. 121 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-12-17 04:24:52,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387479712] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 04:24:52,361 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 04:24:52,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 3] total 10 [2021-12-17 04:24:52,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872657966] [2021-12-17 04:24:52,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 04:24:52,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 04:24:52,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:24:52,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 04:24:52,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-12-17 04:24:52,363 INFO L87 Difference]: Start difference. First operand 16989 states and 18461 transitions. Second operand has 11 states, 11 states have (on average 88.36363636363636) internal successors, (972), 10 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:55,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:24:55,699 INFO L93 Difference]: Finished difference Result 40016 states and 43184 transitions. [2021-12-17 04:24:55,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-17 04:24:55,700 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 88.36363636363636) internal successors, (972), 10 states have internal predecessors, (972), 0 states have call successors, (0), 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 533 [2021-12-17 04:24:55,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:24:55,717 INFO L225 Difference]: With dead ends: 40016 [2021-12-17 04:24:55,717 INFO L226 Difference]: Without dead ends: 21150 [2021-12-17 04:24:55,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1096 GetRequests, 1062 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=346, Invalid=914, Unknown=0, NotChecked=0, Total=1260 [2021-12-17 04:24:55,726 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 1459 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 3532 mSolverCounterSat, 809 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1459 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 4341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 809 IncrementalHoareTripleChecker+Valid, 3532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-17 04:24:55,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1459 Valid, 160 Invalid, 4341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [809 Valid, 3532 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-17 04:24:55,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21150 states. [2021-12-17 04:24:55,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21150 to 12741. [2021-12-17 04:24:55,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12741 states, 12740 states have (on average 1.0580847723704867) internal successors, (13480), 12740 states have internal predecessors, (13480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:55,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12741 states to 12741 states and 13480 transitions. [2021-12-17 04:24:55,914 INFO L78 Accepts]: Start accepts. Automaton has 12741 states and 13480 transitions. Word has length 533 [2021-12-17 04:24:55,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:24:55,914 INFO L470 AbstractCegarLoop]: Abstraction has 12741 states and 13480 transitions. [2021-12-17 04:24:55,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 88.36363636363636) internal successors, (972), 10 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:24:55,915 INFO L276 IsEmpty]: Start isEmpty. Operand 12741 states and 13480 transitions. [2021-12-17 04:24:55,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 537 [2021-12-17 04:24:55,919 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:24:55,919 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:24:55,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 04:24:56,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-17 04:24:56,120 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:24:56,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:24:56,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1729367067, now seen corresponding path program 1 times [2021-12-17 04:24:56,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:24:56,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78220104] [2021-12-17 04:24:56,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:24:56,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:24:56,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:24:56,300 INFO L134 CoverageAnalysis]: Checked inductivity of 746 backedges. 390 proven. 206 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-12-17 04:24:56,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:24:56,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78220104] [2021-12-17 04:24:56,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78220104] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:24:56,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454249723] [2021-12-17 04:24:56,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:24:56,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:24:56,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:24:56,302 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 04:24:56,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 04:24:56,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:24:56,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 711 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 04:24:56,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:24:58,813 INFO L134 CoverageAnalysis]: Checked inductivity of 746 backedges. 341 proven. 255 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-12-17 04:24:58,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 04:25:00,866 INFO L134 CoverageAnalysis]: Checked inductivity of 746 backedges. 527 proven. 69 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2021-12-17 04:25:00,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454249723] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 04:25:00,867 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 04:25:00,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2021-12-17 04:25:00,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505217891] [2021-12-17 04:25:00,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 04:25:00,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 04:25:00,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:25:00,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 04:25:00,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=49, Unknown=0, NotChecked=0, Total=90 [2021-12-17 04:25:00,868 INFO L87 Difference]: Start difference. First operand 12741 states and 13480 transitions. Second operand has 10 states, 10 states have (on average 84.3) internal successors, (843), 10 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:25:03,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:25:03,931 INFO L93 Difference]: Finished difference Result 34531 states and 36526 transitions. [2021-12-17 04:25:03,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 04:25:03,932 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 84.3) internal successors, (843), 10 states have internal predecessors, (843), 0 states have call successors, (0), 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 536 [2021-12-17 04:25:03,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:25:03,951 INFO L225 Difference]: With dead ends: 34531 [2021-12-17 04:25:03,951 INFO L226 Difference]: Without dead ends: 20136 [2021-12-17 04:25:03,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1075 GetRequests, 1066 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=49, Unknown=0, NotChecked=0, Total=90 [2021-12-17 04:25:03,964 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 1089 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 3186 mSolverCounterSat, 365 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1089 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 3551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 365 IncrementalHoareTripleChecker+Valid, 3186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-17 04:25:03,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1089 Valid, 160 Invalid, 3551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [365 Valid, 3186 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-17 04:25:03,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20136 states. [2021-12-17 04:25:04,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20136 to 17913. [2021-12-17 04:25:04,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17913 states, 17912 states have (on average 1.0542094685127288) internal successors, (18883), 17912 states have internal predecessors, (18883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:25:04,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17913 states to 17913 states and 18883 transitions. [2021-12-17 04:25:04,178 INFO L78 Accepts]: Start accepts. Automaton has 17913 states and 18883 transitions. Word has length 536 [2021-12-17 04:25:04,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:25:04,178 INFO L470 AbstractCegarLoop]: Abstraction has 17913 states and 18883 transitions. [2021-12-17 04:25:04,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 84.3) internal successors, (843), 10 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:25:04,178 INFO L276 IsEmpty]: Start isEmpty. Operand 17913 states and 18883 transitions. [2021-12-17 04:25:04,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 671 [2021-12-17 04:25:04,186 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:25:04,186 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:25:04,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-17 04:25:04,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:25:04,387 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:25:04,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:25:04,387 INFO L85 PathProgramCache]: Analyzing trace with hash -90709383, now seen corresponding path program 1 times [2021-12-17 04:25:04,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:25:04,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228449891] [2021-12-17 04:25:04,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:25:04,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:25:04,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:25:04,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1288 backedges. 984 proven. 0 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2021-12-17 04:25:04,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:25:04,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228449891] [2021-12-17 04:25:04,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228449891] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:25:04,558 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:25:04,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:25:04,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838872258] [2021-12-17 04:25:04,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:25:04,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:25:04,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:25:04,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:25:04,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:25:04,560 INFO L87 Difference]: Start difference. First operand 17913 states and 18883 transitions. Second operand has 3 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:25:05,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:25:05,134 INFO L93 Difference]: Finished difference Result 32496 states and 34207 transitions. [2021-12-17 04:25:05,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:25:05,134 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 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 670 [2021-12-17 04:25:05,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:25:05,147 INFO L225 Difference]: With dead ends: 32496 [2021-12-17 04:25:05,147 INFO L226 Difference]: Without dead ends: 14585 [2021-12-17 04:25:05,155 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 [2021-12-17 04:25:05,156 INFO L933 BasicCegarLoop]: 257 mSDtfsCounter, 95 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 04:25:05,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 267 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 04:25:05,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14585 states. [2021-12-17 04:25:05,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14585 to 12739. [2021-12-17 04:25:05,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12739 states, 12738 states have (on average 1.0476526927304128) internal successors, (13345), 12738 states have internal predecessors, (13345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:25:05,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12739 states to 12739 states and 13345 transitions. [2021-12-17 04:25:05,272 INFO L78 Accepts]: Start accepts. Automaton has 12739 states and 13345 transitions. Word has length 670 [2021-12-17 04:25:05,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:25:05,273 INFO L470 AbstractCegarLoop]: Abstraction has 12739 states and 13345 transitions. [2021-12-17 04:25:05,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:25:05,273 INFO L276 IsEmpty]: Start isEmpty. Operand 12739 states and 13345 transitions. [2021-12-17 04:25:05,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 734 [2021-12-17 04:25:05,280 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:25:05,280 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:25:05,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-17 04:25:05,280 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:25:05,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:25:05,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1890581185, now seen corresponding path program 1 times [2021-12-17 04:25:05,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:25:05,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507833256] [2021-12-17 04:25:05,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:25:05,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:25:05,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:25:05,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1390 backedges. 921 proven. 0 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2021-12-17 04:25:05,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:25:05,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507833256] [2021-12-17 04:25:05,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507833256] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:25:05,509 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:25:05,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 04:25:05,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788562704] [2021-12-17 04:25:05,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:25:05,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:25:05,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:25:05,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:25:05,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:25:05,511 INFO L87 Difference]: Start difference. First operand 12739 states and 13345 transitions. Second operand has 4 states, 4 states have (on average 105.0) internal successors, (420), 4 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:25:06,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:25:06,173 INFO L93 Difference]: Finished difference Result 21225 states and 22173 transitions. [2021-12-17 04:25:06,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:25:06,174 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 105.0) internal successors, (420), 4 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 733 [2021-12-17 04:25:06,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:25:06,175 INFO L225 Difference]: With dead ends: 21225 [2021-12-17 04:25:06,175 INFO L226 Difference]: Without dead ends: 0 [2021-12-17 04:25:06,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:25:06,182 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 210 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 04:25:06,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 33 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 844 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 04:25:06,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-12-17 04:25:06,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-12-17 04:25:06,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:25:06,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-12-17 04:25:06,184 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 733 [2021-12-17 04:25:06,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:25:06,184 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-12-17 04:25:06,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 105.0) internal successors, (420), 4 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:25:06,184 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-12-17 04:25:06,184 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-12-17 04:25:06,187 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-17 04:25:06,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-17 04:25:06,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-12-17 04:33:27,547 WARN L227 SmtUtils]: Spent 8.36m on a formula simplification. DAG size of input: 1254 DAG size of output: 1229 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) Killed by 15