./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_lcr.7_overflow.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded/pals_lcr.7_overflow.ufo.UNBOUNDED.pals.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash de654b8e722eb26a01715e643a442ee96e677f28cab0e875133e4d1d7edb214d --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 11:52:28,785 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 11:52:28,787 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 11:52:28,852 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 11:52:28,853 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 11:52:28,856 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 11:52:28,858 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 11:52:28,860 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 11:52:28,862 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 11:52:28,868 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 11:52:28,869 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 11:52:28,870 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 11:52:28,870 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 11:52:28,872 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 11:52:28,873 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 11:52:28,876 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 11:52:28,877 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 11:52:28,878 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 11:52:28,880 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 11:52:28,883 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 11:52:28,885 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 11:52:28,886 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 11:52:28,888 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 11:52:28,888 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 11:52:28,892 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 11:52:28,893 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 11:52:28,893 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 11:52:28,895 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 11:52:28,895 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 11:52:28,896 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 11:52:28,897 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 11:52:28,898 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 11:52:28,899 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 11:52:28,899 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 11:52:28,900 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 11:52:28,901 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 11:52:28,901 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 11:52:28,901 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 11:52:28,902 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 11:52:28,902 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 11:52:28,903 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 11:52:28,903 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 11:52:28,942 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 11:52:28,942 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 11:52:28,943 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 11:52:28,943 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 11:52:28,944 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 11:52:28,944 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 11:52:28,945 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 11:52:28,945 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 11:52:28,945 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 11:52:28,945 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 11:52:28,946 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 11:52:28,946 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 11:52:28,947 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 11:52:28,947 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 11:52:28,947 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 11:52:28,947 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 11:52:28,947 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 11:52:28,947 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 11:52:28,948 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 11:52:28,948 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 11:52:28,948 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 11:52:28,948 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 11:52:28,948 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 11:52:28,949 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 11:52:28,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 11:52:28,949 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 11:52:28,949 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 11:52:28,951 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 11:52:28,951 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 11:52:28,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 11:52:28,951 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 11:52:28,951 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 11:52:28,952 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 11:52:28,952 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 11:52:28,952 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de654b8e722eb26a01715e643a442ee96e677f28cab0e875133e4d1d7edb214d [2021-12-22 11:52:29,186 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 11:52:29,205 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 11:52:29,207 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 11:52:29,208 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 11:52:29,208 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 11:52:29,213 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.7_overflow.ufo.UNBOUNDED.pals.c [2021-12-22 11:52:29,251 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff625022b/c3ff60d372f54e25bc208c064bc6da64/FLAG854a0ea5d [2021-12-22 11:52:29,574 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 11:52:29,574 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.7_overflow.ufo.UNBOUNDED.pals.c [2021-12-22 11:52:29,581 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff625022b/c3ff60d372f54e25bc208c064bc6da64/FLAG854a0ea5d [2021-12-22 11:52:29,991 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff625022b/c3ff60d372f54e25bc208c064bc6da64 [2021-12-22 11:52:29,993 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 11:52:29,994 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 11:52:29,995 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 11:52:29,995 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 11:52:29,997 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 11:52:29,998 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:52:29" (1/1) ... [2021-12-22 11:52:29,998 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e07912f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:29, skipping insertion in model container [2021-12-22 11:52:29,998 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 11:52:29" (1/1) ... [2021-12-22 11:52:30,003 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 11:52:30,023 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 11:52:30,231 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.7_overflow.ufo.UNBOUNDED.pals.c[20121,20134] [2021-12-22 11:52:30,233 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 11:52:30,240 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 11:52:30,275 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.7_overflow.ufo.UNBOUNDED.pals.c[20121,20134] [2021-12-22 11:52:30,275 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 11:52:30,285 INFO L208 MainTranslator]: Completed translation [2021-12-22 11:52:30,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:30 WrapperNode [2021-12-22 11:52:30,286 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 11:52:30,286 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 11:52:30,286 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 11:52:30,287 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 11:52:30,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:30" (1/1) ... [2021-12-22 11:52:30,297 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:30" (1/1) ... [2021-12-22 11:52:30,319 INFO L137 Inliner]: procedures = 27, calls = 18, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 449 [2021-12-22 11:52:30,319 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 11:52:30,319 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 11:52:30,319 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 11:52:30,319 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 11:52:30,325 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:30" (1/1) ... [2021-12-22 11:52:30,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:30" (1/1) ... [2021-12-22 11:52:30,327 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:30" (1/1) ... [2021-12-22 11:52:30,327 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:30" (1/1) ... [2021-12-22 11:52:30,332 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:30" (1/1) ... [2021-12-22 11:52:30,336 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:30" (1/1) ... [2021-12-22 11:52:30,337 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:30" (1/1) ... [2021-12-22 11:52:30,350 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 11:52:30,351 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 11:52:30,351 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 11:52:30,351 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 11:52:30,352 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:30" (1/1) ... [2021-12-22 11:52:30,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 11:52:30,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 11:52:30,373 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 11:52:30,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 11:52:30,439 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 11:52:30,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 11:52:30,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 11:52:30,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 11:52:30,535 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 11:52:30,536 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 11:52:30,973 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 11:52:30,990 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 11:52:30,990 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-22 11:52:30,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:52:30 BoogieIcfgContainer [2021-12-22 11:52:30,993 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 11:52:30,994 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 11:52:30,994 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 11:52:30,997 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 11:52:30,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 11:52:29" (1/3) ... [2021-12-22 11:52:30,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c93bc16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:52:30, skipping insertion in model container [2021-12-22 11:52:30,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 11:52:30" (2/3) ... [2021-12-22 11:52:30,998 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c93bc16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 11:52:30, skipping insertion in model container [2021-12-22 11:52:30,998 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 11:52:30" (3/3) ... [2021-12-22 11:52:30,999 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7_overflow.ufo.UNBOUNDED.pals.c [2021-12-22 11:52:31,003 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 11:52:31,003 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 11:52:31,039 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 11:52:31,044 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 11:52:31,045 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 11:52:31,058 INFO L276 IsEmpty]: Start isEmpty. Operand has 128 states, 126 states have (on average 1.753968253968254) internal successors, (221), 127 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) [2021-12-22 11:52:31,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-22 11:52:31,073 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:52:31,073 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] [2021-12-22 11:52:31,074 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:52:31,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:52:31,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1781508813, now seen corresponding path program 1 times [2021-12-22 11:52:31,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:52:31,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720601854] [2021-12-22 11:52:31,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:52:31,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:52:31,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:52:31,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:52:31,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:52:31,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720601854] [2021-12-22 11:52:31,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720601854] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:52:31,248 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:52:31,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 11:52:31,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958945226] [2021-12-22 11:52:31,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:52:31,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-22 11:52:31,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:52:31,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-22 11:52:31,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 11:52:31,276 INFO L87 Difference]: Start difference. First operand has 128 states, 126 states have (on average 1.753968253968254) internal successors, (221), 127 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) Second operand has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:52:31,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:52:31,306 INFO L93 Difference]: Finished difference Result 197 states and 333 transitions. [2021-12-22 11:52:31,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-22 11:52:31,309 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2021-12-22 11:52:31,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:52:31,317 INFO L225 Difference]: With dead ends: 197 [2021-12-22 11:52:31,317 INFO L226 Difference]: Without dead ends: 124 [2021-12-22 11:52:31,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-22 11:52:31,326 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:52:31,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:52:31,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-22 11:52:31,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-12-22 11:52:31,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.7398373983739837) internal successors, (214), 123 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:52:31,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 214 transitions. [2021-12-22 11:52:31,363 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 214 transitions. Word has length 41 [2021-12-22 11:52:31,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:52:31,364 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 214 transitions. [2021-12-22 11:52:31,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:52:31,364 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 214 transitions. [2021-12-22 11:52:31,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-22 11:52:31,366 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:52:31,366 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] [2021-12-22 11:52:31,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 11:52:31,367 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:52:31,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:52:31,369 INFO L85 PathProgramCache]: Analyzing trace with hash 2119091697, now seen corresponding path program 1 times [2021-12-22 11:52:31,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:52:31,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729797622] [2021-12-22 11:52:31,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:52:31,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:52:31,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:52:31,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:52:31,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:52:31,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729797622] [2021-12-22 11:52:31,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729797622] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:52:31,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:52:31,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:52:31,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283747254] [2021-12-22 11:52:31,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:52:31,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:52:31,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:52:31,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:52:31,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:52:31,499 INFO L87 Difference]: Start difference. First operand 124 states and 214 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:52:31,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:52:31,602 INFO L93 Difference]: Finished difference Result 196 states and 326 transitions. [2021-12-22 11:52:31,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 11:52:31,603 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2021-12-22 11:52:31,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:52:31,606 INFO L225 Difference]: With dead ends: 196 [2021-12-22 11:52:31,606 INFO L226 Difference]: Without dead ends: 124 [2021-12-22 11:52:31,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-22 11:52:31,608 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 3 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 11:52:31,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 795 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 11:52:31,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-22 11:52:31,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-12-22 11:52:31,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.3333333333333333) internal successors, (164), 123 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:52:31,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 164 transitions. [2021-12-22 11:52:31,619 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 164 transitions. Word has length 41 [2021-12-22 11:52:31,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:52:31,620 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 164 transitions. [2021-12-22 11:52:31,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:52:31,620 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 164 transitions. [2021-12-22 11:52:31,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-22 11:52:31,625 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:52:31,625 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:52:31,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 11:52:31,626 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:52:31,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:52:31,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1557003755, now seen corresponding path program 1 times [2021-12-22 11:52:31,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:52:31,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699625282] [2021-12-22 11:52:31,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:52:31,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:52:31,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:52:31,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:52:31,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:52:31,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699625282] [2021-12-22 11:52:31,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699625282] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:52:31,735 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:52:31,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:52:31,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650481326] [2021-12-22 11:52:31,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:52:31,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:52:31,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:52:31,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:52:31,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:52:31,737 INFO L87 Difference]: Start difference. First operand 124 states and 164 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:52:31,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:52:31,753 INFO L93 Difference]: Finished difference Result 254 states and 370 transitions. [2021-12-22 11:52:31,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:52:31,754 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 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 90 [2021-12-22 11:52:31,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:52:31,755 INFO L225 Difference]: With dead ends: 254 [2021-12-22 11:52:31,755 INFO L226 Difference]: Without dead ends: 186 [2021-12-22 11:52:31,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:52:31,757 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 98 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:52:31,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 364 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:52:31,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-12-22 11:52:31,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2021-12-22 11:52:31,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 1.4207650273224044) internal successors, (260), 183 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:52:31,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 260 transitions. [2021-12-22 11:52:31,768 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 260 transitions. Word has length 90 [2021-12-22 11:52:31,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:52:31,774 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 260 transitions. [2021-12-22 11:52:31,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:52:31,775 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 260 transitions. [2021-12-22 11:52:31,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-22 11:52:31,777 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:52:31,777 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:52:31,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 11:52:31,777 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:52:31,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:52:31,778 INFO L85 PathProgramCache]: Analyzing trace with hash -309494901, now seen corresponding path program 1 times [2021-12-22 11:52:31,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:52:31,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456007980] [2021-12-22 11:52:31,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:52:31,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:52:31,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:52:31,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:52:31,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:52:31,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456007980] [2021-12-22 11:52:31,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456007980] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:52:31,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:52:31,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:52:31,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953645810] [2021-12-22 11:52:31,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:52:31,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:52:31,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:52:31,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:52:31,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:52:31,872 INFO L87 Difference]: Start difference. First operand 184 states and 260 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:52:31,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:52:31,892 INFO L93 Difference]: Finished difference Result 428 states and 648 transitions. [2021-12-22 11:52:31,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:52:31,892 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 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 90 [2021-12-22 11:52:31,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:52:31,894 INFO L225 Difference]: With dead ends: 428 [2021-12-22 11:52:31,894 INFO L226 Difference]: Without dead ends: 300 [2021-12-22 11:52:31,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:52:31,896 INFO L933 BasicCegarLoop]: 253 mSDtfsCounter, 94 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:52:31,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 363 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:52:31,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-12-22 11:52:31,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 298. [2021-12-22 11:52:31,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 1.4848484848484849) internal successors, (441), 297 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:52:31,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 441 transitions. [2021-12-22 11:52:31,919 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 441 transitions. Word has length 90 [2021-12-22 11:52:31,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:52:31,919 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 441 transitions. [2021-12-22 11:52:31,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:52:31,919 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 441 transitions. [2021-12-22 11:52:31,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-22 11:52:31,920 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:52:31,920 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:52:31,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 11:52:31,921 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:52:31,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:52:31,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1050927103, now seen corresponding path program 1 times [2021-12-22 11:52:31,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:52:31,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49620433] [2021-12-22 11:52:31,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:52:31,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:52:31,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:52:31,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:52:31,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:52:31,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49620433] [2021-12-22 11:52:31,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49620433] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:52:31,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:52:31,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:52:31,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921176794] [2021-12-22 11:52:31,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:52:31,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:52:31,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:52:31,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:52:31,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:52:31,976 INFO L87 Difference]: Start difference. First operand 298 states and 441 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:52:31,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:52:31,998 INFO L93 Difference]: Finished difference Result 758 states and 1171 transitions. [2021-12-22 11:52:31,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:52:31,999 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 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 90 [2021-12-22 11:52:31,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:52:32,004 INFO L225 Difference]: With dead ends: 758 [2021-12-22 11:52:32,005 INFO L226 Difference]: Without dead ends: 516 [2021-12-22 11:52:32,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:52:32,007 INFO L933 BasicCegarLoop]: 248 mSDtfsCounter, 90 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:52:32,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 362 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:52:32,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-12-22 11:52:32,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 514. [2021-12-22 11:52:32,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 513 states have (on average 1.5224171539961013) internal successors, (781), 513 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:52:32,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 781 transitions. [2021-12-22 11:52:32,046 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 781 transitions. Word has length 90 [2021-12-22 11:52:32,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:52:32,047 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 781 transitions. [2021-12-22 11:52:32,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:52:32,047 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 781 transitions. [2021-12-22 11:52:32,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-22 11:52:32,048 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:52:32,048 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:52:32,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 11:52:32,048 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:52:32,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:52:32,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1796509833, now seen corresponding path program 1 times [2021-12-22 11:52:32,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:52:32,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946976974] [2021-12-22 11:52:32,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:52:32,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:52:32,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:52:32,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:52:32,144 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:52:32,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946976974] [2021-12-22 11:52:32,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946976974] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:52:32,144 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:52:32,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:52:32,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707591170] [2021-12-22 11:52:32,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:52:32,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:52:32,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:52:32,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:52:32,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:52:32,146 INFO L87 Difference]: Start difference. First operand 514 states and 781 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:52:32,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:52:32,170 INFO L93 Difference]: Finished difference Result 1382 states and 2151 transitions. [2021-12-22 11:52:32,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:52:32,170 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 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 90 [2021-12-22 11:52:32,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:52:32,173 INFO L225 Difference]: With dead ends: 1382 [2021-12-22 11:52:32,173 INFO L226 Difference]: Without dead ends: 924 [2021-12-22 11:52:32,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:52:32,175 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 86 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:52:32,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 361 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:52:32,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2021-12-22 11:52:32,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 922. [2021-12-22 11:52:32,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 1.5385450597176982) internal successors, (1417), 921 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:52:32,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 1417 transitions. [2021-12-22 11:52:32,205 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 1417 transitions. Word has length 90 [2021-12-22 11:52:32,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:52:32,205 INFO L470 AbstractCegarLoop]: Abstraction has 922 states and 1417 transitions. [2021-12-22 11:52:32,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:52:32,206 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 1417 transitions. [2021-12-22 11:52:32,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-22 11:52:32,206 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:52:32,206 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:52:32,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 11:52:32,207 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:52:32,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:52:32,207 INFO L85 PathProgramCache]: Analyzing trace with hash -259221845, now seen corresponding path program 1 times [2021-12-22 11:52:32,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:52:32,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405336784] [2021-12-22 11:52:32,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:52:32,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:52:32,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:52:32,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:52:32,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:52:32,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405336784] [2021-12-22 11:52:32,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405336784] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:52:32,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:52:32,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:52:32,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815891444] [2021-12-22 11:52:32,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:52:32,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:52:32,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:52:32,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:52:32,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:52:32,247 INFO L87 Difference]: Start difference. First operand 922 states and 1417 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:52:32,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:52:32,290 INFO L93 Difference]: Finished difference Result 2558 states and 3979 transitions. [2021-12-22 11:52:32,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:52:32,292 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 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 90 [2021-12-22 11:52:32,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:52:32,297 INFO L225 Difference]: With dead ends: 2558 [2021-12-22 11:52:32,298 INFO L226 Difference]: Without dead ends: 1692 [2021-12-22 11:52:32,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:52:32,301 INFO L933 BasicCegarLoop]: 238 mSDtfsCounter, 82 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:52:32,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 360 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:52:32,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2021-12-22 11:52:32,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1690. [2021-12-22 11:52:32,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1690 states, 1689 states have (on average 1.5399644760213145) internal successors, (2601), 1689 states have internal predecessors, (2601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:52:32,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 2601 transitions. [2021-12-22 11:52:32,374 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 2601 transitions. Word has length 90 [2021-12-22 11:52:32,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:52:32,375 INFO L470 AbstractCegarLoop]: Abstraction has 1690 states and 2601 transitions. [2021-12-22 11:52:32,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:52:32,375 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 2601 transitions. [2021-12-22 11:52:32,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-22 11:52:32,375 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:52:32,376 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:52:32,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 11:52:32,376 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:52:32,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:52:32,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1420392415, now seen corresponding path program 1 times [2021-12-22 11:52:32,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:52:32,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436585203] [2021-12-22 11:52:32,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:52:32,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:52:32,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:52:32,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:52:32,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:52:32,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436585203] [2021-12-22 11:52:32,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436585203] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:52:32,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:52:32,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:52:32,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226045559] [2021-12-22 11:52:32,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:52:32,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:52:32,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:52:32,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:52:32,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:52:32,440 INFO L87 Difference]: Start difference. First operand 1690 states and 2601 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:52:32,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:52:32,541 INFO L93 Difference]: Finished difference Result 4766 states and 7371 transitions. [2021-12-22 11:52:32,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:52:32,542 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 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 90 [2021-12-22 11:52:32,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:52:32,551 INFO L225 Difference]: With dead ends: 4766 [2021-12-22 11:52:32,551 INFO L226 Difference]: Without dead ends: 3132 [2021-12-22 11:52:32,552 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 [2021-12-22 11:52:32,554 INFO L933 BasicCegarLoop]: 233 mSDtfsCounter, 78 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:52:32,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 359 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:52:32,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3132 states. [2021-12-22 11:52:32,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3132 to 3130. [2021-12-22 11:52:32,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3130 states, 3129 states have (on average 1.531799296899968) internal successors, (4793), 3129 states have internal predecessors, (4793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:52:32,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3130 states to 3130 states and 4793 transitions. [2021-12-22 11:52:32,665 INFO L78 Accepts]: Start accepts. Automaton has 3130 states and 4793 transitions. Word has length 90 [2021-12-22 11:52:32,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:52:32,668 INFO L470 AbstractCegarLoop]: Abstraction has 3130 states and 4793 transitions. [2021-12-22 11:52:32,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:52:32,668 INFO L276 IsEmpty]: Start isEmpty. Operand 3130 states and 4793 transitions. [2021-12-22 11:52:32,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-22 11:52:32,669 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:52:32,669 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:52:32,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 11:52:32,673 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:52:32,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:52:32,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1758185557, now seen corresponding path program 1 times [2021-12-22 11:52:32,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:52:32,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104430634] [2021-12-22 11:52:32,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:52:32,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:52:32,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:52:32,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:52:32,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:52:32,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104430634] [2021-12-22 11:52:32,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104430634] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:52:32,737 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:52:32,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:52:32,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648230107] [2021-12-22 11:52:32,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:52:32,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:52:32,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:52:32,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:52:32,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:52:32,738 INFO L87 Difference]: Start difference. First operand 3130 states and 4793 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:52:32,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:52:32,896 INFO L93 Difference]: Finished difference Result 8894 states and 13627 transitions. [2021-12-22 11:52:32,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:52:32,897 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 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 90 [2021-12-22 11:52:32,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:52:32,912 INFO L225 Difference]: With dead ends: 8894 [2021-12-22 11:52:32,912 INFO L226 Difference]: Without dead ends: 5820 [2021-12-22 11:52:32,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:52:32,915 INFO L933 BasicCegarLoop]: 228 mSDtfsCounter, 74 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:52:32,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 358 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:52:32,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5820 states. [2021-12-22 11:52:33,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5820 to 5818. [2021-12-22 11:52:33,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5818 states, 5817 states have (on average 1.5171050369606327) internal successors, (8825), 5817 states have internal predecessors, (8825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:52:33,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5818 states to 5818 states and 8825 transitions. [2021-12-22 11:52:33,127 INFO L78 Accepts]: Start accepts. Automaton has 5818 states and 8825 transitions. Word has length 90 [2021-12-22 11:52:33,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:52:33,128 INFO L470 AbstractCegarLoop]: Abstraction has 5818 states and 8825 transitions. [2021-12-22 11:52:33,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:52:33,128 INFO L276 IsEmpty]: Start isEmpty. Operand 5818 states and 8825 transitions. [2021-12-22 11:52:33,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-22 11:52:33,129 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:52:33,129 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:52:33,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 11:52:33,129 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:52:33,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:52:33,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1318796341, now seen corresponding path program 1 times [2021-12-22 11:52:33,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:52:33,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984054352] [2021-12-22 11:52:33,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:52:33,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:52:33,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:52:33,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:52:33,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:52:33,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984054352] [2021-12-22 11:52:33,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984054352] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:52:33,239 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:52:33,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 11:52:33,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512668060] [2021-12-22 11:52:33,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:52:33,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 11:52:33,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:52:33,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 11:52:33,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-22 11:52:33,240 INFO L87 Difference]: Start difference. First operand 5818 states and 8825 transitions. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:52:36,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:52:36,320 INFO L93 Difference]: Finished difference Result 86486 states and 131591 transitions. [2021-12-22 11:52:36,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 11:52:36,321 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 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 90 [2021-12-22 11:52:36,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:52:36,545 INFO L225 Difference]: With dead ends: 86486 [2021-12-22 11:52:36,546 INFO L226 Difference]: Without dead ends: 80724 [2021-12-22 11:52:36,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-12-22 11:52:36,578 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 3049 mSDsluCounter, 1641 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3049 SdHoareTripleChecker+Valid, 1799 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 11:52:36,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3049 Valid, 1799 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 11:52:36,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80724 states. [2021-12-22 11:52:37,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80724 to 11578. [2021-12-22 11:52:37,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11578 states, 11577 states have (on average 1.4975382223373932) internal successors, (17337), 11577 states have internal predecessors, (17337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:52:37,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11578 states to 11578 states and 17337 transitions. [2021-12-22 11:52:37,886 INFO L78 Accepts]: Start accepts. Automaton has 11578 states and 17337 transitions. Word has length 90 [2021-12-22 11:52:37,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:52:37,887 INFO L470 AbstractCegarLoop]: Abstraction has 11578 states and 17337 transitions. [2021-12-22 11:52:37,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:52:37,887 INFO L276 IsEmpty]: Start isEmpty. Operand 11578 states and 17337 transitions. [2021-12-22 11:52:37,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-22 11:52:37,888 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:52:37,888 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:52:37,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 11:52:37,888 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:52:37,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:52:37,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1697127869, now seen corresponding path program 1 times [2021-12-22 11:52:37,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:52:37,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565219012] [2021-12-22 11:52:37,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:52:37,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:52:37,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:52:38,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:52:38,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:52:38,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565219012] [2021-12-22 11:52:38,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565219012] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:52:38,185 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:52:38,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 11:52:38,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342593114] [2021-12-22 11:52:38,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:52:38,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 11:52:38,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:52:38,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 11:52:38,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-22 11:52:38,186 INFO L87 Difference]: Start difference. First operand 11578 states and 17337 transitions. Second operand has 9 states, 9 states have (on average 10.222222222222221) internal successors, (92), 9 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:52:39,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:52:39,048 INFO L93 Difference]: Finished difference Result 23102 states and 34619 transitions. [2021-12-22 11:52:39,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 11:52:39,049 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.222222222222221) internal successors, (92), 9 states have internal predecessors, (92), 0 states have call successors, (0), 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 92 [2021-12-22 11:52:39,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:52:39,067 INFO L225 Difference]: With dead ends: 23102 [2021-12-22 11:52:39,068 INFO L226 Difference]: Without dead ends: 11580 [2021-12-22 11:52:39,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-12-22 11:52:39,080 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 883 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 883 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 11:52:39,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [883 Valid, 785 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 11:52:39,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11580 states. [2021-12-22 11:52:39,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11580 to 11578. [2021-12-22 11:52:39,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11578 states, 11577 states have (on average 1.4864818173965622) internal successors, (17209), 11577 states have internal predecessors, (17209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:52:39,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11578 states to 11578 states and 17209 transitions. [2021-12-22 11:52:39,907 INFO L78 Accepts]: Start accepts. Automaton has 11578 states and 17209 transitions. Word has length 92 [2021-12-22 11:52:39,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:52:39,907 INFO L470 AbstractCegarLoop]: Abstraction has 11578 states and 17209 transitions. [2021-12-22 11:52:39,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.222222222222221) internal successors, (92), 9 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:52:39,908 INFO L276 IsEmpty]: Start isEmpty. Operand 11578 states and 17209 transitions. [2021-12-22 11:52:39,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-22 11:52:39,908 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:52:39,908 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:52:39,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 11:52:39,909 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:52:39,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:52:39,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1763621381, now seen corresponding path program 1 times [2021-12-22 11:52:39,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:52:39,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228584130] [2021-12-22 11:52:39,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:52:39,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:52:39,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:52:39,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:52:39,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:52:39,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228584130] [2021-12-22 11:52:39,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228584130] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:52:39,943 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:52:39,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 11:52:39,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591783947] [2021-12-22 11:52:39,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:52:39,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 11:52:39,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:52:39,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 11:52:39,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:52:39,945 INFO L87 Difference]: Start difference. First operand 11578 states and 17209 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:52:40,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:52:40,830 INFO L93 Difference]: Finished difference Result 28544 states and 42429 transitions. [2021-12-22 11:52:40,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 11:52:40,831 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 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 92 [2021-12-22 11:52:40,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:52:40,849 INFO L225 Difference]: With dead ends: 28544 [2021-12-22 11:52:40,849 INFO L226 Difference]: Without dead ends: 17022 [2021-12-22 11:52:40,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 11:52:40,860 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 66 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:52:40,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 314 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:52:40,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17022 states. [2021-12-22 11:52:41,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17022 to 17020. [2021-12-22 11:52:41,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17020 states, 17019 states have (on average 1.473823373876256) internal successors, (25083), 17019 states have internal predecessors, (25083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:52:41,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17020 states to 17020 states and 25083 transitions. [2021-12-22 11:52:41,863 INFO L78 Accepts]: Start accepts. Automaton has 17020 states and 25083 transitions. Word has length 92 [2021-12-22 11:52:41,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:52:41,864 INFO L470 AbstractCegarLoop]: Abstraction has 17020 states and 25083 transitions. [2021-12-22 11:52:41,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:52:41,864 INFO L276 IsEmpty]: Start isEmpty. Operand 17020 states and 25083 transitions. [2021-12-22 11:52:41,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-22 11:52:41,864 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:52:41,865 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:52:41,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 11:52:41,865 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:52:41,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:52:41,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1486079254, now seen corresponding path program 1 times [2021-12-22 11:52:41,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:52:41,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329115559] [2021-12-22 11:52:41,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:52:41,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:52:41,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:52:41,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:52:41,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:52:41,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329115559] [2021-12-22 11:52:41,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329115559] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:52:41,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:52:41,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:52:41,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133268501] [2021-12-22 11:52:41,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:52:41,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 11:52:41,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:52:41,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 11:52:41,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:52:41,917 INFO L87 Difference]: Start difference. First operand 17020 states and 25083 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:52:42,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:52:42,963 INFO L93 Difference]: Finished difference Result 33982 states and 50108 transitions. [2021-12-22 11:52:42,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 11:52:42,964 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 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 93 [2021-12-22 11:52:42,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:52:42,979 INFO L225 Difference]: With dead ends: 33982 [2021-12-22 11:52:42,979 INFO L226 Difference]: Without dead ends: 17020 [2021-12-22 11:52:42,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-22 11:52:42,990 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 448 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 11:52:42,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 209 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 11:52:42,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17020 states. [2021-12-22 11:52:44,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17020 to 17020. [2021-12-22 11:52:44,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17020 states, 17019 states have (on average 1.4625418649744404) internal successors, (24891), 17019 states have internal predecessors, (24891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:52:44,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17020 states to 17020 states and 24891 transitions. [2021-12-22 11:52:44,339 INFO L78 Accepts]: Start accepts. Automaton has 17020 states and 24891 transitions. Word has length 93 [2021-12-22 11:52:44,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:52:44,340 INFO L470 AbstractCegarLoop]: Abstraction has 17020 states and 24891 transitions. [2021-12-22 11:52:44,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:52:44,340 INFO L276 IsEmpty]: Start isEmpty. Operand 17020 states and 24891 transitions. [2021-12-22 11:52:44,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-22 11:52:44,341 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:52:44,341 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:52:44,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 11:52:44,341 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:52:44,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:52:44,342 INFO L85 PathProgramCache]: Analyzing trace with hash 202864488, now seen corresponding path program 1 times [2021-12-22 11:52:44,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:52:44,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687466574] [2021-12-22 11:52:44,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:52:44,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:52:44,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:52:44,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:52:44,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:52:44,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687466574] [2021-12-22 11:52:44,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687466574] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:52:44,395 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:52:44,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:52:44,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083266754] [2021-12-22 11:52:44,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:52:44,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 11:52:44,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:52:44,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 11:52:44,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 11:52:44,397 INFO L87 Difference]: Start difference. First operand 17020 states and 24891 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:52:45,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:52:45,926 INFO L93 Difference]: Finished difference Result 33982 states and 49724 transitions. [2021-12-22 11:52:45,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 11:52:45,927 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 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 93 [2021-12-22 11:52:45,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:52:45,948 INFO L225 Difference]: With dead ends: 33982 [2021-12-22 11:52:45,948 INFO L226 Difference]: Without dead ends: 17020 [2021-12-22 11:52:45,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-22 11:52:45,970 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 557 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 11:52:45,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [557 Valid, 195 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 11:52:45,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17020 states. [2021-12-22 11:52:47,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17020 to 17020. [2021-12-22 11:52:47,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17020 states, 17019 states have (on average 1.4512603560726247) internal successors, (24699), 17019 states have internal predecessors, (24699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:52:47,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17020 states to 17020 states and 24699 transitions. [2021-12-22 11:52:47,229 INFO L78 Accepts]: Start accepts. Automaton has 17020 states and 24699 transitions. Word has length 93 [2021-12-22 11:52:47,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:52:47,229 INFO L470 AbstractCegarLoop]: Abstraction has 17020 states and 24699 transitions. [2021-12-22 11:52:47,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:52:47,230 INFO L276 IsEmpty]: Start isEmpty. Operand 17020 states and 24699 transitions. [2021-12-22 11:52:47,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-22 11:52:47,230 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:52:47,230 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:52:47,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 11:52:47,231 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:52:47,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:52:47,231 INFO L85 PathProgramCache]: Analyzing trace with hash 2008302822, now seen corresponding path program 1 times [2021-12-22 11:52:47,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:52:47,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430319892] [2021-12-22 11:52:47,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:52:47,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:52:47,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:52:47,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 11:52:47,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:52:47,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430319892] [2021-12-22 11:52:47,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430319892] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:52:47,274 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:52:47,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 11:52:47,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267655363] [2021-12-22 11:52:47,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:52:47,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 11:52:47,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:52:47,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 11:52:47,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 11:52:47,276 INFO L87 Difference]: Start difference. First operand 17020 states and 24699 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:52:49,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:52:49,328 INFO L93 Difference]: Finished difference Result 31519 states and 45297 transitions. [2021-12-22 11:52:49,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 11:52:49,329 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 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 93 [2021-12-22 11:52:49,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:52:49,379 INFO L225 Difference]: With dead ends: 31519 [2021-12-22 11:52:49,379 INFO L226 Difference]: Without dead ends: 31517 [2021-12-22 11:52:49,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 11:52:49,392 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 289 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 11:52:49,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 676 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 11:52:49,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31517 states. [2021-12-22 11:52:50,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31517 to 17788. [2021-12-22 11:52:50,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17788 states, 17787 states have (on average 1.4281778827233373) internal successors, (25403), 17787 states have internal predecessors, (25403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:52:50,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17788 states to 17788 states and 25403 transitions. [2021-12-22 11:52:50,834 INFO L78 Accepts]: Start accepts. Automaton has 17788 states and 25403 transitions. Word has length 93 [2021-12-22 11:52:50,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:52:50,835 INFO L470 AbstractCegarLoop]: Abstraction has 17788 states and 25403 transitions. [2021-12-22 11:52:50,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:52:50,835 INFO L276 IsEmpty]: Start isEmpty. Operand 17788 states and 25403 transitions. [2021-12-22 11:52:50,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-22 11:52:50,846 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:52:50,846 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:52:50,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-22 11:52:50,846 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:52:50,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:52:50,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1787662099, now seen corresponding path program 1 times [2021-12-22 11:52:50,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:52:50,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314354086] [2021-12-22 11:52:50,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:52:50,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:52:50,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:52:50,924 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-22 11:52:50,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:52:50,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314354086] [2021-12-22 11:52:50,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314354086] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:52:50,926 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:52:50,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 11:52:50,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696567137] [2021-12-22 11:52:50,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:52:50,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 11:52:50,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:52:50,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 11:52:50,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-22 11:52:50,928 INFO L87 Difference]: Start difference. First operand 17788 states and 25403 transitions. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:00,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:53:00,223 INFO L93 Difference]: Finished difference Result 145356 states and 207555 transitions. [2021-12-22 11:53:00,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 11:53:00,224 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2021-12-22 11:53:00,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:53:00,419 INFO L225 Difference]: With dead ends: 145356 [2021-12-22 11:53:00,419 INFO L226 Difference]: Without dead ends: 127626 [2021-12-22 11:53:00,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-12-22 11:53:00,455 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 2142 mSDsluCounter, 953 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2142 SdHoareTripleChecker+Valid, 1211 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 11:53:00,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2142 Valid, 1211 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 11:53:00,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127626 states. [2021-12-22 11:53:04,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127626 to 35516. [2021-12-22 11:53:04,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35516 states, 35515 states have (on average 1.4234830353371815) internal successors, (50555), 35515 states have internal predecessors, (50555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:04,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35516 states to 35516 states and 50555 transitions. [2021-12-22 11:53:04,219 INFO L78 Accepts]: Start accepts. Automaton has 35516 states and 50555 transitions. Word has length 129 [2021-12-22 11:53:04,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 11:53:04,220 INFO L470 AbstractCegarLoop]: Abstraction has 35516 states and 50555 transitions. [2021-12-22 11:53:04,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:04,220 INFO L276 IsEmpty]: Start isEmpty. Operand 35516 states and 50555 transitions. [2021-12-22 11:53:04,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-22 11:53:04,271 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 11:53:04,271 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 11:53:04,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-22 11:53:04,272 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 11:53:04,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 11:53:04,273 INFO L85 PathProgramCache]: Analyzing trace with hash 18879283, now seen corresponding path program 1 times [2021-12-22 11:53:04,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 11:53:04,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168804443] [2021-12-22 11:53:04,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 11:53:04,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 11:53:04,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 11:53:04,349 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-22 11:53:04,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 11:53:04,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168804443] [2021-12-22 11:53:04,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168804443] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 11:53:04,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 11:53:04,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 11:53:04,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919000543] [2021-12-22 11:53:04,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 11:53:04,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 11:53:04,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 11:53:04,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 11:53:04,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-22 11:53:04,351 INFO L87 Difference]: Start difference. First operand 35516 states and 50555 transitions. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 11:53:16,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 11:53:16,365 INFO L93 Difference]: Finished difference Result 163084 states and 232707 transitions. [2021-12-22 11:53:16,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 11:53:16,371 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 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 129 [2021-12-22 11:53:16,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 11:53:16,585 INFO L225 Difference]: With dead ends: 163084 [2021-12-22 11:53:16,585 INFO L226 Difference]: Without dead ends: 145354 [2021-12-22 11:53:16,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-12-22 11:53:16,625 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 1893 mSDsluCounter, 1005 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1893 SdHoareTripleChecker+Valid, 1263 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 11:53:16,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1893 Valid, 1263 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 11:53:16,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145354 states.