./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-2.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 4ea93d7c6d06d46004840cc5fcb436c7c307334e6ee754b8ee507b78f644445d --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 02:31:34,831 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 02:31:34,833 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 02:31:34,870 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 02:31:34,871 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 02:31:34,873 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 02:31:34,874 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 02:31:34,876 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 02:31:34,877 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 02:31:34,881 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 02:31:34,881 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 02:31:34,882 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 02:31:34,882 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 02:31:34,884 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 02:31:34,885 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 02:31:34,890 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 02:31:34,891 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 02:31:34,891 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 02:31:34,892 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 02:31:34,893 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 02:31:34,896 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 02:31:34,897 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 02:31:34,898 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 02:31:34,898 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 02:31:34,900 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 02:31:34,900 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 02:31:34,901 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 02:31:34,901 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 02:31:34,902 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 02:31:34,902 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 02:31:34,902 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 02:31:34,903 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 02:31:34,904 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 02:31:34,904 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 02:31:34,906 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 02:31:34,906 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 02:31:34,907 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 02:31:34,907 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 02:31:34,907 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 02:31:34,908 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 02:31:34,908 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 02:31:34,909 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 02:31:34,929 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 02:31:34,936 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 02:31:34,937 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 02:31:34,937 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 02:31:34,937 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 02:31:34,938 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 02:31:34,938 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 02:31:34,938 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 02:31:34,938 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 02:31:34,939 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 02:31:34,939 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 02:31:34,939 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 02:31:34,940 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 02:31:34,940 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 02:31:34,940 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 02:31:34,940 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 02:31:34,940 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 02:31:34,940 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 02:31:34,940 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 02:31:34,941 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 02:31:34,941 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 02:31:34,941 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 02:31:34,941 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 02:31:34,941 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 02:31:34,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 02:31:34,942 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 02:31:34,942 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 02:31:34,942 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 02:31:34,942 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 02:31:34,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 02:31:34,942 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 02:31:34,942 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 02:31:34,943 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 02:31:34,943 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 02:31:34,943 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4ea93d7c6d06d46004840cc5fcb436c7c307334e6ee754b8ee507b78f644445d [2021-12-16 02:31:35,138 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 02:31:35,159 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 02:31:35,161 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 02:31:35,162 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 02:31:35,163 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 02:31:35,164 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-2.c [2021-12-16 02:31:35,213 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1737ae33/ecd23816d24440138ed0d9f138749322/FLAG0b19195bf [2021-12-16 02:31:35,566 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 02:31:35,567 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-2.c [2021-12-16 02:31:35,578 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1737ae33/ecd23816d24440138ed0d9f138749322/FLAG0b19195bf [2021-12-16 02:31:35,589 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1737ae33/ecd23816d24440138ed0d9f138749322 [2021-12-16 02:31:35,591 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 02:31:35,592 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 02:31:35,600 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 02:31:35,600 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 02:31:35,602 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 02:31:35,603 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 02:31:35" (1/1) ... [2021-12-16 02:31:35,604 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@119ae498 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:31:35, skipping insertion in model container [2021-12-16 02:31:35,604 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 02:31:35" (1/1) ... [2021-12-16 02:31:35,608 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 02:31:35,641 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 02:31:35,761 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/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-2.c[914,927] [2021-12-16 02:31:35,810 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/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-2.c[7115,7128] [2021-12-16 02:31:35,829 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 02:31:35,837 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 02:31:35,845 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/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-2.c[914,927] [2021-12-16 02:31:35,864 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/combinations/pc_sfifo_2.cil-1+token_ring.02.cil-2.c[7115,7128] [2021-12-16 02:31:35,881 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 02:31:35,898 INFO L208 MainTranslator]: Completed translation [2021-12-16 02:31:35,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:31:35 WrapperNode [2021-12-16 02:31:35,899 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 02:31:35,899 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 02:31:35,899 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 02:31:35,900 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 02:31:35,906 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:31:35" (1/1) ... [2021-12-16 02:31:35,918 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:31:35" (1/1) ... [2021-12-16 02:31:35,939 INFO L137 Inliner]: procedures = 57, calls = 64, calls flagged for inlining = 25, calls inlined = 25, statements flattened = 465 [2021-12-16 02:31:35,943 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 02:31:35,944 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 02:31:35,944 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 02:31:35,944 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 02:31:35,949 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:31:35" (1/1) ... [2021-12-16 02:31:35,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:31:35" (1/1) ... [2021-12-16 02:31:35,952 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:31:35" (1/1) ... [2021-12-16 02:31:35,952 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:31:35" (1/1) ... [2021-12-16 02:31:35,957 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:31:35" (1/1) ... [2021-12-16 02:31:35,962 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:31:35" (1/1) ... [2021-12-16 02:31:35,964 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:31:35" (1/1) ... [2021-12-16 02:31:35,966 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 02:31:35,967 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 02:31:35,967 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 02:31:35,967 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 02:31:35,968 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:31:35" (1/1) ... [2021-12-16 02:31:35,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 02:31:35,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:31:36,004 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) [2021-12-16 02:31:36,009 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 [2021-12-16 02:31:36,030 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 02:31:36,032 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-16 02:31:36,032 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-16 02:31:36,032 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-12-16 02:31:36,033 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-12-16 02:31:36,036 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-16 02:31:36,036 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-16 02:31:36,036 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-16 02:31:36,036 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-16 02:31:36,036 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-12-16 02:31:36,037 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-12-16 02:31:36,037 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-16 02:31:36,037 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-16 02:31:36,037 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-16 02:31:36,037 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-16 02:31:36,037 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-12-16 02:31:36,037 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-12-16 02:31:36,037 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-12-16 02:31:36,038 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-12-16 02:31:36,038 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-12-16 02:31:36,038 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-12-16 02:31:36,038 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-16 02:31:36,038 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-16 02:31:36,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 02:31:36,038 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-16 02:31:36,038 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-16 02:31:36,038 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-12-16 02:31:36,039 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-12-16 02:31:36,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 02:31:36,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 02:31:36,039 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-16 02:31:36,039 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-16 02:31:36,039 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-16 02:31:36,039 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-16 02:31:36,114 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 02:31:36,115 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 02:31:36,513 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 02:31:36,519 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 02:31:36,519 INFO L301 CfgBuilder]: Removed 9 assume(true) statements. [2021-12-16 02:31:36,524 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 02:31:36 BoogieIcfgContainer [2021-12-16 02:31:36,524 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 02:31:36,526 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 02:31:36,526 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 02:31:36,529 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 02:31:36,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 02:31:35" (1/3) ... [2021-12-16 02:31:36,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b225257 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 02:31:36, skipping insertion in model container [2021-12-16 02:31:36,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 02:31:35" (2/3) ... [2021-12-16 02:31:36,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b225257 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 02:31:36, skipping insertion in model container [2021-12-16 02:31:36,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 02:31:36" (3/3) ... [2021-12-16 02:31:36,531 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.02.cil-2.c [2021-12-16 02:31:36,536 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 02:31:36,536 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-16 02:31:36,568 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 02:31:36,574 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 [2021-12-16 02:31:36,575 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-16 02:31:36,604 INFO L276 IsEmpty]: Start isEmpty. Operand has 241 states, 191 states have (on average 1.5654450261780104) internal successors, (299), 199 states have internal predecessors, (299), 32 states have call successors, (32), 15 states have call predecessors, (32), 15 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2021-12-16 02:31:36,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-16 02:31:36,622 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:31:36,623 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] [2021-12-16 02:31:36,624 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:31:36,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:31:36,631 INFO L85 PathProgramCache]: Analyzing trace with hash -448089429, now seen corresponding path program 1 times [2021-12-16 02:31:36,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:31:36,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017916849] [2021-12-16 02:31:36,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:36,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:31:36,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:36,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:31:36,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:36,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:31:36,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:36,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-16 02:31:36,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:36,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 02:31:36,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:36,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:31:36,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:36,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 02:31:36,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:36,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-16 02:31:36,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:36,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:31:36,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:31:36,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017916849] [2021-12-16 02:31:36,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017916849] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:31:36,909 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:31:36,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 02:31:36,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524678375] [2021-12-16 02:31:36,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:31:36,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 02:31:36,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:31:36,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 02:31:36,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-16 02:31:36,941 INFO L87 Difference]: Start difference. First operand has 241 states, 191 states have (on average 1.5654450261780104) internal successors, (299), 199 states have internal predecessors, (299), 32 states have call successors, (32), 15 states have call predecessors, (32), 15 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-16 02:31:37,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:31:37,397 INFO L93 Difference]: Finished difference Result 482 states and 727 transitions. [2021-12-16 02:31:37,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 02:31:37,399 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-16 02:31:37,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:31:37,421 INFO L225 Difference]: With dead ends: 482 [2021-12-16 02:31:37,422 INFO L226 Difference]: Without dead ends: 248 [2021-12-16 02:31:37,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-16 02:31:37,428 INFO L933 BasicCegarLoop]: 333 mSDtfsCounter, 351 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 923 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 02:31:37,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 923 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 02:31:37,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-12-16 02:31:37,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 230. [2021-12-16 02:31:37,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 183 states have (on average 1.46448087431694) internal successors, (268), 188 states have internal predecessors, (268), 32 states have call successors, (32), 15 states have call predecessors, (32), 13 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2021-12-16 02:31:37,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 328 transitions. [2021-12-16 02:31:37,500 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 328 transitions. Word has length 65 [2021-12-16 02:31:37,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:31:37,500 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 328 transitions. [2021-12-16 02:31:37,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-16 02:31:37,501 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 328 transitions. [2021-12-16 02:31:37,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-16 02:31:37,511 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:31:37,511 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:31:37,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 02:31:37,512 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:31:37,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:31:37,512 INFO L85 PathProgramCache]: Analyzing trace with hash -488764179, now seen corresponding path program 1 times [2021-12-16 02:31:37,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:31:37,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445993664] [2021-12-16 02:31:37,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:37,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:31:37,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:37,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:31:37,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:37,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:31:37,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:37,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-16 02:31:37,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:37,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 02:31:37,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:37,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:31:37,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:37,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 02:31:37,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:37,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-16 02:31:37,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:37,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:31:37,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:31:37,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445993664] [2021-12-16 02:31:37,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445993664] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:31:37,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:31:37,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-16 02:31:37,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325814907] [2021-12-16 02:31:37,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:31:37,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 02:31:37,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:31:37,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 02:31:37,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:31:37,637 INFO L87 Difference]: Start difference. First operand 230 states and 328 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-16 02:31:38,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:31:38,136 INFO L93 Difference]: Finished difference Result 453 states and 642 transitions. [2021-12-16 02:31:38,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 02:31:38,136 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-16 02:31:38,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:31:38,141 INFO L225 Difference]: With dead ends: 453 [2021-12-16 02:31:38,141 INFO L226 Difference]: Without dead ends: 365 [2021-12-16 02:31:38,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-12-16 02:31:38,148 INFO L933 BasicCegarLoop]: 341 mSDtfsCounter, 592 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 1008 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 02:31:38,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [597 Valid, 1008 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 02:31:38,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-12-16 02:31:38,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 326. [2021-12-16 02:31:38,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 259 states have (on average 1.4362934362934363) internal successors, (372), 266 states have internal predecessors, (372), 43 states have call successors, (43), 22 states have call predecessors, (43), 22 states have return successors, (44), 40 states have call predecessors, (44), 39 states have call successors, (44) [2021-12-16 02:31:38,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 459 transitions. [2021-12-16 02:31:38,178 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 459 transitions. Word has length 65 [2021-12-16 02:31:38,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:31:38,178 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 459 transitions. [2021-12-16 02:31:38,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-16 02:31:38,179 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 459 transitions. [2021-12-16 02:31:38,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-16 02:31:38,181 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:31:38,181 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] [2021-12-16 02:31:38,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 02:31:38,181 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:31:38,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:31:38,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1049575851, now seen corresponding path program 1 times [2021-12-16 02:31:38,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:31:38,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363430330] [2021-12-16 02:31:38,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:38,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:31:38,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:38,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:31:38,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:38,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:31:38,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:38,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-16 02:31:38,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:38,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 02:31:38,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:38,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:31:38,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:38,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 02:31:38,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:38,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-16 02:31:38,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:38,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:31:38,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:31:38,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363430330] [2021-12-16 02:31:38,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363430330] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:31:38,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:31:38,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-16 02:31:38,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939079468] [2021-12-16 02:31:38,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:31:38,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 02:31:38,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:31:38,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 02:31:38,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-16 02:31:38,319 INFO L87 Difference]: Start difference. First operand 326 states and 459 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-16 02:31:38,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:31:38,847 INFO L93 Difference]: Finished difference Result 540 states and 753 transitions. [2021-12-16 02:31:38,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 02:31:38,847 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2021-12-16 02:31:38,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:31:38,850 INFO L225 Difference]: With dead ends: 540 [2021-12-16 02:31:38,850 INFO L226 Difference]: Without dead ends: 363 [2021-12-16 02:31:38,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-16 02:31:38,851 INFO L933 BasicCegarLoop]: 315 mSDtfsCounter, 252 mSDsluCounter, 1274 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 1589 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 02:31:38,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 1589 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 02:31:38,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-12-16 02:31:38,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 331. [2021-12-16 02:31:38,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 263 states have (on average 1.4258555133079849) internal successors, (375), 270 states have internal predecessors, (375), 43 states have call successors, (43), 22 states have call predecessors, (43), 23 states have return successors, (45), 41 states have call predecessors, (45), 39 states have call successors, (45) [2021-12-16 02:31:38,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 463 transitions. [2021-12-16 02:31:38,868 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 463 transitions. Word has length 65 [2021-12-16 02:31:38,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:31:38,869 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 463 transitions. [2021-12-16 02:31:38,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-16 02:31:38,869 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 463 transitions. [2021-12-16 02:31:38,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-16 02:31:38,870 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:31:38,870 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] [2021-12-16 02:31:38,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 02:31:38,870 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:31:38,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:31:38,870 INFO L85 PathProgramCache]: Analyzing trace with hash 20216553, now seen corresponding path program 1 times [2021-12-16 02:31:38,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:31:38,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281952137] [2021-12-16 02:31:38,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:38,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:31:38,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:38,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:31:38,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:38,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:31:38,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:38,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-16 02:31:38,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:38,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 02:31:38,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:38,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:31:38,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:38,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 02:31:38,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:38,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-16 02:31:38,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:38,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:31:38,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:31:38,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281952137] [2021-12-16 02:31:38,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281952137] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:31:38,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:31:38,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-16 02:31:38,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091533652] [2021-12-16 02:31:38,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:31:38,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-16 02:31:38,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:31:38,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-16 02:31:38,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-16 02:31:38,973 INFO L87 Difference]: Start difference. First operand 331 states and 463 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-16 02:31:40,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:31:40,184 INFO L93 Difference]: Finished difference Result 1231 states and 1681 transitions. [2021-12-16 02:31:40,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-16 02:31:40,184 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 65 [2021-12-16 02:31:40,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:31:40,189 INFO L225 Difference]: With dead ends: 1231 [2021-12-16 02:31:40,190 INFO L226 Difference]: Without dead ends: 1037 [2021-12-16 02:31:40,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-12-16 02:31:40,192 INFO L933 BasicCegarLoop]: 437 mSDtfsCounter, 1873 mSDsluCounter, 1290 mSDsCounter, 0 mSdLazyCounter, 1381 mSolverCounterSat, 532 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1889 SdHoareTripleChecker+Valid, 1727 SdHoareTripleChecker+Invalid, 1913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 532 IncrementalHoareTripleChecker+Valid, 1381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-16 02:31:40,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1889 Valid, 1727 Invalid, 1913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [532 Valid, 1381 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-16 02:31:40,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2021-12-16 02:31:40,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 912. [2021-12-16 02:31:40,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 725 states have (on average 1.3655172413793104) internal successors, (990), 740 states have internal predecessors, (990), 100 states have call successors, (100), 75 states have call predecessors, (100), 85 states have return successors, (114), 98 states have call predecessors, (114), 96 states have call successors, (114) [2021-12-16 02:31:40,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1204 transitions. [2021-12-16 02:31:40,267 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1204 transitions. Word has length 65 [2021-12-16 02:31:40,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:31:40,267 INFO L470 AbstractCegarLoop]: Abstraction has 912 states and 1204 transitions. [2021-12-16 02:31:40,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-16 02:31:40,268 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1204 transitions. [2021-12-16 02:31:40,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-16 02:31:40,269 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:31:40,269 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] [2021-12-16 02:31:40,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 02:31:40,269 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:31:40,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:31:40,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1071665642, now seen corresponding path program 1 times [2021-12-16 02:31:40,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:31:40,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686525892] [2021-12-16 02:31:40,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:40,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:31:40,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:40,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:31:40,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:40,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:31:40,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:40,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-16 02:31:40,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:40,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 02:31:40,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:40,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:31:40,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:40,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 02:31:40,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:40,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-16 02:31:40,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:40,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:31:40,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:31:40,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686525892] [2021-12-16 02:31:40,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686525892] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:31:40,412 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:31:40,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-16 02:31:40,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462077039] [2021-12-16 02:31:40,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:31:40,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 02:31:40,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:31:40,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 02:31:40,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-16 02:31:40,414 INFO L87 Difference]: Start difference. First operand 912 states and 1204 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-16 02:31:40,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:31:40,870 INFO L93 Difference]: Finished difference Result 1793 states and 2347 transitions. [2021-12-16 02:31:40,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 02:31:40,871 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2021-12-16 02:31:40,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:31:40,874 INFO L225 Difference]: With dead ends: 1793 [2021-12-16 02:31:40,874 INFO L226 Difference]: Without dead ends: 1024 [2021-12-16 02:31:40,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-12-16 02:31:40,877 INFO L933 BasicCegarLoop]: 312 mSDtfsCounter, 372 mSDsluCounter, 1117 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 1429 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 02:31:40,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [374 Valid, 1429 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 02:31:40,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2021-12-16 02:31:40,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 932. [2021-12-16 02:31:40,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 741 states have (on average 1.3508771929824561) internal successors, (1001), 756 states have internal predecessors, (1001), 100 states have call successors, (100), 75 states have call predecessors, (100), 89 states have return successors, (118), 102 states have call predecessors, (118), 96 states have call successors, (118) [2021-12-16 02:31:40,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1219 transitions. [2021-12-16 02:31:40,909 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1219 transitions. Word has length 65 [2021-12-16 02:31:40,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:31:40,910 INFO L470 AbstractCegarLoop]: Abstraction has 932 states and 1219 transitions. [2021-12-16 02:31:40,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-16 02:31:40,910 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1219 transitions. [2021-12-16 02:31:40,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-16 02:31:40,911 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:31:40,911 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] [2021-12-16 02:31:40,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-16 02:31:40,911 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:31:40,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:31:40,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1837098260, now seen corresponding path program 1 times [2021-12-16 02:31:40,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:31:40,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444606862] [2021-12-16 02:31:40,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:40,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:31:40,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:40,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:31:40,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:40,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:31:40,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:40,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-16 02:31:40,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:40,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 02:31:40,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:40,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:31:40,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:40,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 02:31:40,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:40,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-16 02:31:40,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:40,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:31:40,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:31:40,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444606862] [2021-12-16 02:31:40,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444606862] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:31:40,997 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:31:40,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-16 02:31:40,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665007691] [2021-12-16 02:31:40,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:31:40,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 02:31:40,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:31:40,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 02:31:40,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:31:40,998 INFO L87 Difference]: Start difference. First operand 932 states and 1219 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-16 02:31:41,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:31:41,624 INFO L93 Difference]: Finished difference Result 2500 states and 3166 transitions. [2021-12-16 02:31:41,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-16 02:31:41,624 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-16 02:31:41,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:31:41,631 INFO L225 Difference]: With dead ends: 2500 [2021-12-16 02:31:41,631 INFO L226 Difference]: Without dead ends: 1712 [2021-12-16 02:31:41,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-12-16 02:31:41,634 INFO L933 BasicCegarLoop]: 334 mSDtfsCounter, 650 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 1173 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 02:31:41,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [669 Valid, 1173 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-16 02:31:41,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2021-12-16 02:31:41,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 1380. [2021-12-16 02:31:41,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1094 states have (on average 1.3254113345521024) internal successors, (1450), 1118 states have internal predecessors, (1450), 146 states have call successors, (146), 114 states have call predecessors, (146), 138 states have return successors, (190), 150 states have call predecessors, (190), 142 states have call successors, (190) [2021-12-16 02:31:41,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 1786 transitions. [2021-12-16 02:31:41,686 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 1786 transitions. Word has length 65 [2021-12-16 02:31:41,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:31:41,687 INFO L470 AbstractCegarLoop]: Abstraction has 1380 states and 1786 transitions. [2021-12-16 02:31:41,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-16 02:31:41,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 1786 transitions. [2021-12-16 02:31:41,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-16 02:31:41,688 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:31:41,689 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] [2021-12-16 02:31:41,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-16 02:31:41,689 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:31:41,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:31:41,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1971111766, now seen corresponding path program 1 times [2021-12-16 02:31:41,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:31:41,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359686004] [2021-12-16 02:31:41,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:41,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:31:41,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:41,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:31:41,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:41,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:31:41,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:41,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-16 02:31:41,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:41,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 02:31:41,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:41,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:31:41,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:41,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 02:31:41,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:41,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-16 02:31:41,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:41,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:31:41,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:31:41,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359686004] [2021-12-16 02:31:41,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359686004] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:31:41,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:31:41,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 02:31:41,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449352237] [2021-12-16 02:31:41,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:31:41,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 02:31:41,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:31:41,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 02:31:41,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:31:41,773 INFO L87 Difference]: Start difference. First operand 1380 states and 1786 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-16 02:31:42,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:31:42,082 INFO L93 Difference]: Finished difference Result 3851 states and 4925 transitions. [2021-12-16 02:31:42,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 02:31:42,082 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-16 02:31:42,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:31:42,093 INFO L225 Difference]: With dead ends: 3851 [2021-12-16 02:31:42,093 INFO L226 Difference]: Without dead ends: 2617 [2021-12-16 02:31:42,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-12-16 02:31:42,098 INFO L933 BasicCegarLoop]: 299 mSDtfsCounter, 772 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 795 SdHoareTripleChecker+Valid, 780 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 02:31:42,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [795 Valid, 780 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 02:31:42,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2617 states. [2021-12-16 02:31:42,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2617 to 2509. [2021-12-16 02:31:42,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2509 states, 1963 states have (on average 1.2745797249108508) internal successors, (2502), 2008 states have internal predecessors, (2502), 270 states have call successors, (270), 220 states have call predecessors, (270), 274 states have return successors, (398), 283 states have call predecessors, (398), 266 states have call successors, (398) [2021-12-16 02:31:42,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2509 states to 2509 states and 3170 transitions. [2021-12-16 02:31:42,221 INFO L78 Accepts]: Start accepts. Automaton has 2509 states and 3170 transitions. Word has length 65 [2021-12-16 02:31:42,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:31:42,222 INFO L470 AbstractCegarLoop]: Abstraction has 2509 states and 3170 transitions. [2021-12-16 02:31:42,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-16 02:31:42,223 INFO L276 IsEmpty]: Start isEmpty. Operand 2509 states and 3170 transitions. [2021-12-16 02:31:42,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-16 02:31:42,224 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:31:42,224 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] [2021-12-16 02:31:42,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-16 02:31:42,224 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:31:42,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:31:42,225 INFO L85 PathProgramCache]: Analyzing trace with hash -291684510, now seen corresponding path program 1 times [2021-12-16 02:31:42,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:31:42,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886514483] [2021-12-16 02:31:42,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:42,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:31:42,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:42,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:31:42,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:42,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:31:42,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:42,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-16 02:31:42,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:42,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 02:31:42,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:42,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:31:42,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:42,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 02:31:42,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:42,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-16 02:31:42,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:42,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:31:42,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:31:42,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886514483] [2021-12-16 02:31:42,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886514483] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:31:42,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:31:42,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 02:31:42,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591073529] [2021-12-16 02:31:42,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:31:42,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 02:31:42,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:31:42,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 02:31:42,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-16 02:31:42,293 INFO L87 Difference]: Start difference. First operand 2509 states and 3170 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-16 02:31:42,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:31:42,661 INFO L93 Difference]: Finished difference Result 5831 states and 7344 transitions. [2021-12-16 02:31:42,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 02:31:42,662 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2021-12-16 02:31:42,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:31:42,675 INFO L225 Difference]: With dead ends: 5831 [2021-12-16 02:31:42,675 INFO L226 Difference]: Without dead ends: 3468 [2021-12-16 02:31:42,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-16 02:31:42,682 INFO L933 BasicCegarLoop]: 321 mSDtfsCounter, 421 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 931 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 02:31:42,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [430 Valid, 931 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 02:31:42,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3468 states. [2021-12-16 02:31:42,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3468 to 3214. [2021-12-16 02:31:42,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3214 states, 2511 states have (on average 1.2652329749103943) internal successors, (3177), 2562 states have internal predecessors, (3177), 346 states have call successors, (346), 286 states have call predecessors, (346), 355 states have return successors, (494), 368 states have call predecessors, (494), 342 states have call successors, (494) [2021-12-16 02:31:42,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3214 states to 3214 states and 4017 transitions. [2021-12-16 02:31:42,784 INFO L78 Accepts]: Start accepts. Automaton has 3214 states and 4017 transitions. Word has length 66 [2021-12-16 02:31:42,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:31:42,785 INFO L470 AbstractCegarLoop]: Abstraction has 3214 states and 4017 transitions. [2021-12-16 02:31:42,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-16 02:31:42,785 INFO L276 IsEmpty]: Start isEmpty. Operand 3214 states and 4017 transitions. [2021-12-16 02:31:42,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-16 02:31:42,786 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:31:42,786 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] [2021-12-16 02:31:42,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-16 02:31:42,786 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:31:42,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:31:42,787 INFO L85 PathProgramCache]: Analyzing trace with hash 342944188, now seen corresponding path program 1 times [2021-12-16 02:31:42,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:31:42,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446470597] [2021-12-16 02:31:42,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:42,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:31:42,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:42,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:31:42,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:42,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:31:42,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:42,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 02:31:42,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:42,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 02:31:42,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:42,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:31:42,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:42,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:31:42,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:31:42,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446470597] [2021-12-16 02:31:42,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446470597] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:31:42,846 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:31:42,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 02:31:42,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417724699] [2021-12-16 02:31:42,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:31:42,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 02:31:42,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:31:42,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 02:31:42,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 02:31:42,848 INFO L87 Difference]: Start difference. First operand 3214 states and 4017 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:31:43,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:31:43,184 INFO L93 Difference]: Finished difference Result 3374 states and 4261 transitions. [2021-12-16 02:31:43,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 02:31:43,184 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2021-12-16 02:31:43,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:31:43,195 INFO L225 Difference]: With dead ends: 3374 [2021-12-16 02:31:43,195 INFO L226 Difference]: Without dead ends: 3246 [2021-12-16 02:31:43,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-16 02:31:43,197 INFO L933 BasicCegarLoop]: 337 mSDtfsCounter, 396 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 02:31:43,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 680 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 02:31:43,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3246 states. [2021-12-16 02:31:43,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3246 to 3214. [2021-12-16 02:31:43,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3214 states, 2511 states have (on average 1.2648347272003186) internal successors, (3176), 2562 states have internal predecessors, (3176), 346 states have call successors, (346), 286 states have call predecessors, (346), 355 states have return successors, (494), 368 states have call predecessors, (494), 342 states have call successors, (494) [2021-12-16 02:31:43,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3214 states to 3214 states and 4016 transitions. [2021-12-16 02:31:43,327 INFO L78 Accepts]: Start accepts. Automaton has 3214 states and 4016 transitions. Word has length 69 [2021-12-16 02:31:43,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:31:43,328 INFO L470 AbstractCegarLoop]: Abstraction has 3214 states and 4016 transitions. [2021-12-16 02:31:43,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:31:43,328 INFO L276 IsEmpty]: Start isEmpty. Operand 3214 states and 4016 transitions. [2021-12-16 02:31:43,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-16 02:31:43,329 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:31:43,329 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] [2021-12-16 02:31:43,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-16 02:31:43,329 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:31:43,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:31:43,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1618630470, now seen corresponding path program 1 times [2021-12-16 02:31:43,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:31:43,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822914285] [2021-12-16 02:31:43,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:43,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:31:43,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:43,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:31:43,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:43,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:31:43,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:43,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 02:31:43,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:43,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 02:31:43,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:43,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:31:43,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:43,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:31:43,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:31:43,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822914285] [2021-12-16 02:31:43,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822914285] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:31:43,385 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:31:43,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 02:31:43,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061007302] [2021-12-16 02:31:43,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:31:43,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 02:31:43,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:31:43,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 02:31:43,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 02:31:43,386 INFO L87 Difference]: Start difference. First operand 3214 states and 4016 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:31:43,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:31:43,986 INFO L93 Difference]: Finished difference Result 3524 states and 4487 transitions. [2021-12-16 02:31:43,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 02:31:43,986 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2021-12-16 02:31:43,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:31:43,998 INFO L225 Difference]: With dead ends: 3524 [2021-12-16 02:31:43,998 INFO L226 Difference]: Without dead ends: 3400 [2021-12-16 02:31:44,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-16 02:31:44,002 INFO L933 BasicCegarLoop]: 339 mSDtfsCounter, 637 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 885 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 02:31:44,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [656 Valid, 885 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-16 02:31:44,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3400 states. [2021-12-16 02:31:44,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3400 to 3335. [2021-12-16 02:31:44,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3335 states, 2614 states have (on average 1.2746748278500382) internal successors, (3332), 2666 states have internal predecessors, (3332), 357 states have call successors, (357), 292 states have call predecessors, (357), 362 states have return successors, (508), 379 states have call predecessors, (508), 353 states have call successors, (508) [2021-12-16 02:31:44,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3335 states to 3335 states and 4197 transitions. [2021-12-16 02:31:44,130 INFO L78 Accepts]: Start accepts. Automaton has 3335 states and 4197 transitions. Word has length 69 [2021-12-16 02:31:44,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:31:44,130 INFO L470 AbstractCegarLoop]: Abstraction has 3335 states and 4197 transitions. [2021-12-16 02:31:44,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:31:44,131 INFO L276 IsEmpty]: Start isEmpty. Operand 3335 states and 4197 transitions. [2021-12-16 02:31:44,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-16 02:31:44,132 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:31:44,132 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] [2021-12-16 02:31:44,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-16 02:31:44,132 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:31:44,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:31:44,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1515916106, now seen corresponding path program 1 times [2021-12-16 02:31:44,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:31:44,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765618523] [2021-12-16 02:31:44,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:44,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:31:44,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:44,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:31:44,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:44,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:31:44,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:44,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 02:31:44,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:44,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 02:31:44,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:44,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:31:44,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:44,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:31:44,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:31:44,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765618523] [2021-12-16 02:31:44,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765618523] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:31:44,203 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:31:44,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 02:31:44,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080541181] [2021-12-16 02:31:44,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:31:44,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 02:31:44,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:31:44,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 02:31:44,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:31:44,204 INFO L87 Difference]: Start difference. First operand 3335 states and 4197 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:31:44,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:31:44,639 INFO L93 Difference]: Finished difference Result 3645 states and 4670 transitions. [2021-12-16 02:31:44,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 02:31:44,639 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2021-12-16 02:31:44,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:31:44,653 INFO L225 Difference]: With dead ends: 3645 [2021-12-16 02:31:44,653 INFO L226 Difference]: Without dead ends: 3400 [2021-12-16 02:31:44,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-16 02:31:44,656 INFO L933 BasicCegarLoop]: 302 mSDtfsCounter, 631 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 02:31:44,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [651 Valid, 720 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 02:31:44,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3400 states. [2021-12-16 02:31:44,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3400 to 3335. [2021-12-16 02:31:44,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3335 states, 2614 states have (on average 1.2739097169089517) internal successors, (3330), 2666 states have internal predecessors, (3330), 357 states have call successors, (357), 292 states have call predecessors, (357), 362 states have return successors, (508), 379 states have call predecessors, (508), 353 states have call successors, (508) [2021-12-16 02:31:44,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3335 states to 3335 states and 4195 transitions. [2021-12-16 02:31:44,815 INFO L78 Accepts]: Start accepts. Automaton has 3335 states and 4195 transitions. Word has length 69 [2021-12-16 02:31:44,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:31:44,815 INFO L470 AbstractCegarLoop]: Abstraction has 3335 states and 4195 transitions. [2021-12-16 02:31:44,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:31:44,816 INFO L276 IsEmpty]: Start isEmpty. Operand 3335 states and 4195 transitions. [2021-12-16 02:31:44,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-16 02:31:44,817 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:31:44,818 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] [2021-12-16 02:31:44,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-16 02:31:44,818 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:31:44,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:31:44,818 INFO L85 PathProgramCache]: Analyzing trace with hash -129130696, now seen corresponding path program 1 times [2021-12-16 02:31:44,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:31:44,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147251089] [2021-12-16 02:31:44,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:44,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:31:44,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:44,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:31:44,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:44,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:31:44,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:44,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 02:31:44,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:44,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 02:31:44,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:44,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:31:44,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:44,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:31:44,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:31:44,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147251089] [2021-12-16 02:31:44,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147251089] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:31:44,889 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:31:44,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 02:31:44,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916728894] [2021-12-16 02:31:44,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:31:44,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 02:31:44,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:31:44,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 02:31:44,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:31:44,891 INFO L87 Difference]: Start difference. First operand 3335 states and 4195 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:31:45,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:31:45,699 INFO L93 Difference]: Finished difference Result 3831 states and 4935 transitions. [2021-12-16 02:31:45,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-16 02:31:45,699 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2021-12-16 02:31:45,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:31:45,711 INFO L225 Difference]: With dead ends: 3831 [2021-12-16 02:31:45,712 INFO L226 Difference]: Without dead ends: 3586 [2021-12-16 02:31:45,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-16 02:31:45,714 INFO L933 BasicCegarLoop]: 387 mSDtfsCounter, 670 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 1104 SdHoareTripleChecker+Invalid, 1167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-16 02:31:45,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [688 Valid, 1104 Invalid, 1167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1048 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-16 02:31:45,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3586 states. [2021-12-16 02:31:45,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3586 to 3447. [2021-12-16 02:31:45,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3447 states, 2709 states have (on average 1.2812846068660022) internal successors, (3471), 2762 states have internal predecessors, (3471), 367 states have call successors, (367), 298 states have call predecessors, (367), 369 states have return successors, (520), 390 states have call predecessors, (520), 363 states have call successors, (520) [2021-12-16 02:31:45,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3447 states to 3447 states and 4358 transitions. [2021-12-16 02:31:45,852 INFO L78 Accepts]: Start accepts. Automaton has 3447 states and 4358 transitions. Word has length 69 [2021-12-16 02:31:45,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:31:45,853 INFO L470 AbstractCegarLoop]: Abstraction has 3447 states and 4358 transitions. [2021-12-16 02:31:45,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:31:45,854 INFO L276 IsEmpty]: Start isEmpty. Operand 3447 states and 4358 transitions. [2021-12-16 02:31:45,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-16 02:31:45,855 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:31:45,855 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] [2021-12-16 02:31:45,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-16 02:31:45,856 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:31:45,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:31:45,856 INFO L85 PathProgramCache]: Analyzing trace with hash 314769978, now seen corresponding path program 1 times [2021-12-16 02:31:45,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:31:45,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132141866] [2021-12-16 02:31:45,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:45,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:31:45,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:45,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:31:45,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:45,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:31:45,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:45,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 02:31:45,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:45,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 02:31:45,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:45,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:31:45,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:45,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:31:45,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:31:45,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132141866] [2021-12-16 02:31:45,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132141866] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:31:45,908 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:31:45,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 02:31:45,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794753320] [2021-12-16 02:31:45,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:31:45,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 02:31:45,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:31:45,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 02:31:45,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:31:45,910 INFO L87 Difference]: Start difference. First operand 3447 states and 4358 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:31:46,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:31:46,353 INFO L93 Difference]: Finished difference Result 3898 states and 5035 transitions. [2021-12-16 02:31:46,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 02:31:46,354 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2021-12-16 02:31:46,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:31:46,375 INFO L225 Difference]: With dead ends: 3898 [2021-12-16 02:31:46,375 INFO L226 Difference]: Without dead ends: 3541 [2021-12-16 02:31:46,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-16 02:31:46,378 INFO L933 BasicCegarLoop]: 292 mSDtfsCounter, 625 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 645 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 02:31:46,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [645 Valid, 707 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 02:31:46,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3541 states. [2021-12-16 02:31:46,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3541 to 3447. [2021-12-16 02:31:46,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3447 states, 2709 states have (on average 1.2801771871539314) internal successors, (3468), 2762 states have internal predecessors, (3468), 367 states have call successors, (367), 298 states have call predecessors, (367), 369 states have return successors, (520), 390 states have call predecessors, (520), 363 states have call successors, (520) [2021-12-16 02:31:46,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3447 states to 3447 states and 4355 transitions. [2021-12-16 02:31:46,495 INFO L78 Accepts]: Start accepts. Automaton has 3447 states and 4355 transitions. Word has length 69 [2021-12-16 02:31:46,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:31:46,496 INFO L470 AbstractCegarLoop]: Abstraction has 3447 states and 4355 transitions. [2021-12-16 02:31:46,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:31:46,496 INFO L276 IsEmpty]: Start isEmpty. Operand 3447 states and 4355 transitions. [2021-12-16 02:31:46,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-16 02:31:46,498 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:31:46,498 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] [2021-12-16 02:31:46,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-16 02:31:46,498 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:31:46,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:31:46,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1853110008, now seen corresponding path program 1 times [2021-12-16 02:31:46,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:31:46,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644029160] [2021-12-16 02:31:46,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:46,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:31:46,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:46,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:31:46,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:46,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:31:46,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:46,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 02:31:46,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:46,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 02:31:46,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:46,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:31:46,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:46,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:31:46,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:31:46,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644029160] [2021-12-16 02:31:46,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644029160] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:31:46,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:31:46,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 02:31:46,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843675178] [2021-12-16 02:31:46,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:31:46,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 02:31:46,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:31:46,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 02:31:46,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:31:46,551 INFO L87 Difference]: Start difference. First operand 3447 states and 4355 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:31:47,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:31:47,028 INFO L93 Difference]: Finished difference Result 3894 states and 5018 transitions. [2021-12-16 02:31:47,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 02:31:47,029 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2021-12-16 02:31:47,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:31:47,039 INFO L225 Difference]: With dead ends: 3894 [2021-12-16 02:31:47,039 INFO L226 Difference]: Without dead ends: 3537 [2021-12-16 02:31:47,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-16 02:31:47,042 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 623 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 02:31:47,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [643 Valid, 704 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 02:31:47,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3537 states. [2021-12-16 02:31:47,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3537 to 3447. [2021-12-16 02:31:47,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3447 states, 2709 states have (on average 1.2790697674418605) internal successors, (3465), 2762 states have internal predecessors, (3465), 367 states have call successors, (367), 298 states have call predecessors, (367), 369 states have return successors, (520), 390 states have call predecessors, (520), 363 states have call successors, (520) [2021-12-16 02:31:47,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3447 states to 3447 states and 4352 transitions. [2021-12-16 02:31:47,183 INFO L78 Accepts]: Start accepts. Automaton has 3447 states and 4352 transitions. Word has length 69 [2021-12-16 02:31:47,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:31:47,184 INFO L470 AbstractCegarLoop]: Abstraction has 3447 states and 4352 transitions. [2021-12-16 02:31:47,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:31:47,184 INFO L276 IsEmpty]: Start isEmpty. Operand 3447 states and 4352 transitions. [2021-12-16 02:31:47,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-16 02:31:47,185 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:31:47,185 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] [2021-12-16 02:31:47,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-16 02:31:47,185 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:31:47,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:31:47,186 INFO L85 PathProgramCache]: Analyzing trace with hash -175476102, now seen corresponding path program 1 times [2021-12-16 02:31:47,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:31:47,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019676936] [2021-12-16 02:31:47,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:47,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:31:47,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:47,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:31:47,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:47,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:31:47,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:47,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 02:31:47,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:47,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 02:31:47,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:47,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:31:47,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:47,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:31:47,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:31:47,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019676936] [2021-12-16 02:31:47,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019676936] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:31:47,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:31:47,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 02:31:47,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625175726] [2021-12-16 02:31:47,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:31:47,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 02:31:47,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:31:47,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 02:31:47,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:31:47,259 INFO L87 Difference]: Start difference. First operand 3447 states and 4352 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:31:47,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:31:47,838 INFO L93 Difference]: Finished difference Result 3996 states and 5172 transitions. [2021-12-16 02:31:47,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 02:31:47,838 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2021-12-16 02:31:47,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:31:47,854 INFO L225 Difference]: With dead ends: 3996 [2021-12-16 02:31:47,854 INFO L226 Difference]: Without dead ends: 3640 [2021-12-16 02:31:47,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-12-16 02:31:47,858 INFO L933 BasicCegarLoop]: 312 mSDtfsCounter, 363 mSDsluCounter, 896 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 1208 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 02:31:47,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 1208 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 02:31:47,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3640 states. [2021-12-16 02:31:47,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3640 to 3456. [2021-12-16 02:31:47,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3456 states, 2718 states have (on average 1.2781456953642385) internal successors, (3474), 2771 states have internal predecessors, (3474), 367 states have call successors, (367), 298 states have call predecessors, (367), 369 states have return successors, (520), 390 states have call predecessors, (520), 363 states have call successors, (520) [2021-12-16 02:31:47,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3456 states to 3456 states and 4361 transitions. [2021-12-16 02:31:47,973 INFO L78 Accepts]: Start accepts. Automaton has 3456 states and 4361 transitions. Word has length 69 [2021-12-16 02:31:47,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:31:47,973 INFO L470 AbstractCegarLoop]: Abstraction has 3456 states and 4361 transitions. [2021-12-16 02:31:47,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:31:47,973 INFO L276 IsEmpty]: Start isEmpty. Operand 3456 states and 4361 transitions. [2021-12-16 02:31:47,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-16 02:31:47,974 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:31:47,974 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] [2021-12-16 02:31:47,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-16 02:31:47,975 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:31:47,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:31:47,975 INFO L85 PathProgramCache]: Analyzing trace with hash 72670392, now seen corresponding path program 1 times [2021-12-16 02:31:47,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:31:47,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833291771] [2021-12-16 02:31:47,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:47,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:31:47,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:47,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:31:47,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:47,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:31:47,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:48,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 02:31:48,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:48,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 02:31:48,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:48,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:31:48,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:48,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:31:48,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:31:48,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833291771] [2021-12-16 02:31:48,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833291771] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:31:48,050 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:31:48,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 02:31:48,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39188511] [2021-12-16 02:31:48,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:31:48,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 02:31:48,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:31:48,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 02:31:48,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:31:48,052 INFO L87 Difference]: Start difference. First operand 3456 states and 4361 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:31:49,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:31:49,081 INFO L93 Difference]: Finished difference Result 5040 states and 6744 transitions. [2021-12-16 02:31:49,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-16 02:31:49,082 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2021-12-16 02:31:49,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:31:49,093 INFO L225 Difference]: With dead ends: 5040 [2021-12-16 02:31:49,094 INFO L226 Difference]: Without dead ends: 4675 [2021-12-16 02:31:49,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-12-16 02:31:49,097 INFO L933 BasicCegarLoop]: 486 mSDtfsCounter, 1221 mSDsluCounter, 743 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 304 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1243 SdHoareTripleChecker+Valid, 1229 SdHoareTripleChecker+Invalid, 1265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 304 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-16 02:31:49,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1243 Valid, 1229 Invalid, 1265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [304 Valid, 961 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-16 02:31:49,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4675 states. [2021-12-16 02:31:49,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4675 to 4380. [2021-12-16 02:31:49,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4380 states, 3489 states have (on average 1.3078245915735167) internal successors, (4563), 3557 states have internal predecessors, (4563), 460 states have call successors, (460), 352 states have call predecessors, (460), 429 states have return successors, (667), 474 states have call predecessors, (667), 456 states have call successors, (667) [2021-12-16 02:31:49,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4380 states to 4380 states and 5690 transitions. [2021-12-16 02:31:49,318 INFO L78 Accepts]: Start accepts. Automaton has 4380 states and 5690 transitions. Word has length 69 [2021-12-16 02:31:49,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:31:49,318 INFO L470 AbstractCegarLoop]: Abstraction has 4380 states and 5690 transitions. [2021-12-16 02:31:49,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 02:31:49,318 INFO L276 IsEmpty]: Start isEmpty. Operand 4380 states and 5690 transitions. [2021-12-16 02:31:49,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-16 02:31:49,320 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:31:49,320 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] [2021-12-16 02:31:49,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-16 02:31:49,320 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:31:49,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:31:49,321 INFO L85 PathProgramCache]: Analyzing trace with hash 867157537, now seen corresponding path program 1 times [2021-12-16 02:31:49,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:31:49,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694053431] [2021-12-16 02:31:49,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:49,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:31:49,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:49,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:31:49,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:49,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:31:49,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:49,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-16 02:31:49,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:49,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 02:31:49,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:49,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:31:49,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:49,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 02:31:49,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:49,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-16 02:31:49,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:49,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:31:49,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:31:49,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694053431] [2021-12-16 02:31:49,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694053431] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:31:49,365 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:31:49,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 02:31:49,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539291612] [2021-12-16 02:31:49,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:31:49,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 02:31:49,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:31:49,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 02:31:49,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-16 02:31:49,367 INFO L87 Difference]: Start difference. First operand 4380 states and 5690 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-16 02:31:49,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:31:49,739 INFO L93 Difference]: Finished difference Result 7966 states and 10120 transitions. [2021-12-16 02:31:49,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 02:31:49,740 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 72 [2021-12-16 02:31:49,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:31:49,751 INFO L225 Difference]: With dead ends: 7966 [2021-12-16 02:31:49,751 INFO L226 Difference]: Without dead ends: 4896 [2021-12-16 02:31:49,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-16 02:31:49,757 INFO L933 BasicCegarLoop]: 331 mSDtfsCounter, 566 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 590 SdHoareTripleChecker+Valid, 844 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 02:31:49,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [590 Valid, 844 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 02:31:49,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4896 states. [2021-12-16 02:31:49,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4896 to 4663. [2021-12-16 02:31:49,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4663 states, 3714 states have (on average 1.3007539041464729) internal successors, (4831), 3785 states have internal predecessors, (4831), 488 states have call successors, (488), 377 states have call predecessors, (488), 459 states have return successors, (701), 504 states have call predecessors, (701), 484 states have call successors, (701) [2021-12-16 02:31:49,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4663 states to 4663 states and 6020 transitions. [2021-12-16 02:31:49,926 INFO L78 Accepts]: Start accepts. Automaton has 4663 states and 6020 transitions. Word has length 72 [2021-12-16 02:31:49,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:31:49,927 INFO L470 AbstractCegarLoop]: Abstraction has 4663 states and 6020 transitions. [2021-12-16 02:31:49,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-16 02:31:49,927 INFO L276 IsEmpty]: Start isEmpty. Operand 4663 states and 6020 transitions. [2021-12-16 02:31:49,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-16 02:31:49,928 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:31:49,928 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-16 02:31:49,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-16 02:31:49,929 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:31:49,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:31:49,929 INFO L85 PathProgramCache]: Analyzing trace with hash 595856072, now seen corresponding path program 1 times [2021-12-16 02:31:49,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:31:49,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802903578] [2021-12-16 02:31:49,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:49,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:31:49,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:49,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:31:49,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:49,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:31:49,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:49,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-16 02:31:49,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:49,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 02:31:49,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:49,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:31:49,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:49,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 02:31:49,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:49,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-16 02:31:49,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:49,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:31:49,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:31:49,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802903578] [2021-12-16 02:31:49,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802903578] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:31:49,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:31:49,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 02:31:49,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708584837] [2021-12-16 02:31:49,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:31:49,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 02:31:49,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:31:49,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 02:31:49,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:31:49,989 INFO L87 Difference]: Start difference. First operand 4663 states and 6020 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-16 02:31:50,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:31:50,474 INFO L93 Difference]: Finished difference Result 5717 states and 7287 transitions. [2021-12-16 02:31:50,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 02:31:50,475 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 73 [2021-12-16 02:31:50,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:31:50,489 INFO L225 Difference]: With dead ends: 5717 [2021-12-16 02:31:50,489 INFO L226 Difference]: Without dead ends: 5714 [2021-12-16 02:31:50,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-12-16 02:31:50,492 INFO L933 BasicCegarLoop]: 327 mSDtfsCounter, 1028 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 290 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1038 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 290 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 02:31:50,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1038 Valid, 663 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [290 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 02:31:50,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5714 states. [2021-12-16 02:31:50,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5714 to 5420. [2021-12-16 02:31:50,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5420 states, 4292 states have (on average 1.288443616029823) internal successors, (5530), 4370 states have internal predecessors, (5530), 571 states have call successors, (571), 449 states have call predecessors, (571), 555 states have return successors, (829), 604 states have call predecessors, (829), 568 states have call successors, (829) [2021-12-16 02:31:50,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5420 states to 5420 states and 6930 transitions. [2021-12-16 02:31:50,734 INFO L78 Accepts]: Start accepts. Automaton has 5420 states and 6930 transitions. Word has length 73 [2021-12-16 02:31:50,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:31:50,735 INFO L470 AbstractCegarLoop]: Abstraction has 5420 states and 6930 transitions. [2021-12-16 02:31:50,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-16 02:31:50,735 INFO L276 IsEmpty]: Start isEmpty. Operand 5420 states and 6930 transitions. [2021-12-16 02:31:50,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-16 02:31:50,736 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:31:50,736 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-16 02:31:50,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-16 02:31:50,736 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:31:50,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:31:50,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1290941259, now seen corresponding path program 1 times [2021-12-16 02:31:50,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:31:50,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315178130] [2021-12-16 02:31:50,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:50,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:31:50,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:50,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:31:50,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:50,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:31:50,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:50,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-16 02:31:50,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:50,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 02:31:50,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:50,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:31:50,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:50,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 02:31:50,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:50,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-16 02:31:50,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:50,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:31:50,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:31:50,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315178130] [2021-12-16 02:31:50,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315178130] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:31:50,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244552556] [2021-12-16 02:31:50,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:50,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:31:50,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:31:50,812 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:31:50,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 02:31:50,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:50,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-16 02:31:50,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:31:51,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:31:51,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 02:31:51,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:31:51,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244552556] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 02:31:51,458 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 02:31:51,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 10 [2021-12-16 02:31:51,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735814834] [2021-12-16 02:31:51,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 02:31:51,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-16 02:31:51,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:31:51,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-16 02:31:51,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-16 02:31:51,459 INFO L87 Difference]: Start difference. First operand 5420 states and 6930 transitions. Second operand has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-16 02:31:52,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:31:52,805 INFO L93 Difference]: Finished difference Result 9839 states and 12304 transitions. [2021-12-16 02:31:52,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-16 02:31:52,805 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 74 [2021-12-16 02:31:52,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:31:52,829 INFO L225 Difference]: With dead ends: 9839 [2021-12-16 02:31:52,829 INFO L226 Difference]: Without dead ends: 9836 [2021-12-16 02:31:52,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 174 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2021-12-16 02:31:52,834 INFO L933 BasicCegarLoop]: 477 mSDtfsCounter, 999 mSDsluCounter, 1344 mSDsCounter, 0 mSdLazyCounter, 1552 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1055 SdHoareTripleChecker+Valid, 1821 SdHoareTripleChecker+Invalid, 1743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 1552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-16 02:31:52,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1055 Valid, 1821 Invalid, 1743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 1552 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-16 02:31:52,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9836 states. [2021-12-16 02:31:53,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9836 to 8979. [2021-12-16 02:31:53,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8979 states, 7077 states have (on average 1.2664971032923555) internal successors, (8963), 7206 states have internal predecessors, (8963), 941 states have call successors, (941), 774 states have call predecessors, (941), 959 states have return successors, (1375), 1002 states have call predecessors, (1375), 938 states have call successors, (1375) [2021-12-16 02:31:53,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8979 states to 8979 states and 11279 transitions. [2021-12-16 02:31:53,227 INFO L78 Accepts]: Start accepts. Automaton has 8979 states and 11279 transitions. Word has length 74 [2021-12-16 02:31:53,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:31:53,227 INFO L470 AbstractCegarLoop]: Abstraction has 8979 states and 11279 transitions. [2021-12-16 02:31:53,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-16 02:31:53,228 INFO L276 IsEmpty]: Start isEmpty. Operand 8979 states and 11279 transitions. [2021-12-16 02:31:53,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-16 02:31:53,229 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:31:53,229 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:31:53,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 02:31:53,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:31:53,453 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:31:53,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:31:53,453 INFO L85 PathProgramCache]: Analyzing trace with hash 372887048, now seen corresponding path program 2 times [2021-12-16 02:31:53,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:31:53,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776332620] [2021-12-16 02:31:53,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:53,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:31:53,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:53,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:31:53,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:53,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:31:53,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:53,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-16 02:31:53,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:53,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 02:31:53,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:53,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:31:53,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:53,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 02:31:53,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:53,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-16 02:31:53,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:53,493 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 02:31:53,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:31:53,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776332620] [2021-12-16 02:31:53,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776332620] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:31:53,493 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:31:53,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 02:31:53,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610783586] [2021-12-16 02:31:53,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:31:53,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 02:31:53,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:31:53,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 02:31:53,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-16 02:31:53,495 INFO L87 Difference]: Start difference. First operand 8979 states and 11279 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-16 02:31:53,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:31:53,923 INFO L93 Difference]: Finished difference Result 11988 states and 15003 transitions. [2021-12-16 02:31:53,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 02:31:53,924 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 77 [2021-12-16 02:31:53,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:31:53,937 INFO L225 Difference]: With dead ends: 11988 [2021-12-16 02:31:53,937 INFO L226 Difference]: Without dead ends: 5190 [2021-12-16 02:31:53,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-16 02:31:53,950 INFO L933 BasicCegarLoop]: 360 mSDtfsCounter, 516 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 906 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 02:31:53,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [542 Valid, 906 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 02:31:53,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5190 states. [2021-12-16 02:31:54,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5190 to 4164. [2021-12-16 02:31:54,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4164 states, 3328 states have (on average 1.2872596153846154) internal successors, (4284), 3379 states have internal predecessors, (4284), 441 states have call successors, (441), 339 states have call predecessors, (441), 393 states have return successors, (601), 449 states have call predecessors, (601), 438 states have call successors, (601) [2021-12-16 02:31:54,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4164 states to 4164 states and 5326 transitions. [2021-12-16 02:31:54,142 INFO L78 Accepts]: Start accepts. Automaton has 4164 states and 5326 transitions. Word has length 77 [2021-12-16 02:31:54,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:31:54,143 INFO L470 AbstractCegarLoop]: Abstraction has 4164 states and 5326 transitions. [2021-12-16 02:31:54,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-16 02:31:54,143 INFO L276 IsEmpty]: Start isEmpty. Operand 4164 states and 5326 transitions. [2021-12-16 02:31:54,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-16 02:31:54,145 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:31:54,145 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:31:54,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-16 02:31:54,145 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:31:54,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:31:54,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1502182211, now seen corresponding path program 1 times [2021-12-16 02:31:54,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:31:54,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299927421] [2021-12-16 02:31:54,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:54,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:31:54,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:54,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:31:54,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:54,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:31:54,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:54,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-16 02:31:54,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:54,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 02:31:54,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:54,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:31:54,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:54,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 02:31:54,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:54,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-16 02:31:54,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:54,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-16 02:31:54,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:54,227 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-16 02:31:54,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:31:54,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299927421] [2021-12-16 02:31:54,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299927421] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:31:54,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:31:54,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-16 02:31:54,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334177489] [2021-12-16 02:31:54,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:31:54,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 02:31:54,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:31:54,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 02:31:54,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:31:54,231 INFO L87 Difference]: Start difference. First operand 4164 states and 5326 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-16 02:31:55,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:31:55,002 INFO L93 Difference]: Finished difference Result 9888 states and 12250 transitions. [2021-12-16 02:31:55,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-16 02:31:55,002 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 84 [2021-12-16 02:31:55,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:31:55,020 INFO L225 Difference]: With dead ends: 9888 [2021-12-16 02:31:55,020 INFO L226 Difference]: Without dead ends: 6092 [2021-12-16 02:31:55,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-12-16 02:31:55,029 INFO L933 BasicCegarLoop]: 361 mSDtfsCounter, 1079 mSDsluCounter, 673 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1091 SdHoareTripleChecker+Valid, 1034 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 322 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 02:31:55,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1091 Valid, 1034 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [322 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 02:31:55,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6092 states. [2021-12-16 02:31:55,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6092 to 5861. [2021-12-16 02:31:55,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5861 states, 4622 states have (on average 1.2520553872782345) internal successors, (5787), 4710 states have internal predecessors, (5787), 625 states have call successors, (625), 497 states have call predecessors, (625), 612 states have return successors, (922), 657 states have call predecessors, (922), 622 states have call successors, (922) [2021-12-16 02:31:55,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5861 states to 5861 states and 7334 transitions. [2021-12-16 02:31:55,380 INFO L78 Accepts]: Start accepts. Automaton has 5861 states and 7334 transitions. Word has length 84 [2021-12-16 02:31:55,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:31:55,381 INFO L470 AbstractCegarLoop]: Abstraction has 5861 states and 7334 transitions. [2021-12-16 02:31:55,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-16 02:31:55,381 INFO L276 IsEmpty]: Start isEmpty. Operand 5861 states and 7334 transitions. [2021-12-16 02:31:55,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-16 02:31:55,383 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:31:55,384 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:31:55,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-16 02:31:55,384 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:31:55,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:31:55,384 INFO L85 PathProgramCache]: Analyzing trace with hash 905485990, now seen corresponding path program 1 times [2021-12-16 02:31:55,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:31:55,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405629965] [2021-12-16 02:31:55,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:55,385 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:31:55,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:55,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:31:55,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:55,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:31:55,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:55,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-16 02:31:55,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:55,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 02:31:55,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:55,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:31:55,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:55,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 02:31:55,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:55,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-16 02:31:55,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:55,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-16 02:31:55,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:55,447 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-16 02:31:55,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:31:55,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405629965] [2021-12-16 02:31:55,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405629965] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:31:55,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:31:55,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-16 02:31:55,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073883065] [2021-12-16 02:31:55,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:31:55,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 02:31:55,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:31:55,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 02:31:55,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-16 02:31:55,450 INFO L87 Difference]: Start difference. First operand 5861 states and 7334 transitions. Second operand has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-16 02:31:56,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:31:56,384 INFO L93 Difference]: Finished difference Result 8740 states and 10818 transitions. [2021-12-16 02:31:56,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-16 02:31:56,384 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 93 [2021-12-16 02:31:56,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:31:56,397 INFO L225 Difference]: With dead ends: 8740 [2021-12-16 02:31:56,397 INFO L226 Difference]: Without dead ends: 4926 [2021-12-16 02:31:56,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2021-12-16 02:31:56,406 INFO L933 BasicCegarLoop]: 350 mSDtfsCounter, 1142 mSDsluCounter, 873 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1171 SdHoareTripleChecker+Valid, 1223 SdHoareTripleChecker+Invalid, 1154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-16 02:31:56,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1171 Valid, 1223 Invalid, 1154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 857 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-16 02:31:56,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4926 states. [2021-12-16 02:31:56,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4926 to 4549. [2021-12-16 02:31:56,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4549 states, 3594 states have (on average 1.2548692264885921) internal successors, (4510), 3665 states have internal predecessors, (4510), 483 states have call successors, (483), 373 states have call predecessors, (483), 470 states have return successors, (687), 514 states have call predecessors, (687), 480 states have call successors, (687) [2021-12-16 02:31:56,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4549 states to 4549 states and 5680 transitions. [2021-12-16 02:31:56,639 INFO L78 Accepts]: Start accepts. Automaton has 4549 states and 5680 transitions. Word has length 93 [2021-12-16 02:31:56,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:31:56,639 INFO L470 AbstractCegarLoop]: Abstraction has 4549 states and 5680 transitions. [2021-12-16 02:31:56,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-16 02:31:56,640 INFO L276 IsEmpty]: Start isEmpty. Operand 4549 states and 5680 transitions. [2021-12-16 02:31:56,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-16 02:31:56,643 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:31:56,643 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:31:56,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-16 02:31:56,643 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:31:56,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:31:56,644 INFO L85 PathProgramCache]: Analyzing trace with hash -33791116, now seen corresponding path program 1 times [2021-12-16 02:31:56,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:31:56,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585166151] [2021-12-16 02:31:56,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:56,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:31:56,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:56,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:31:56,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:56,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:31:56,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:56,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 02:31:56,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:56,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 02:31:56,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:56,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:31:56,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:56,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-16 02:31:56,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:56,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:31:56,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:56,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-16 02:31:56,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:56,720 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-16 02:31:56,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:31:56,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585166151] [2021-12-16 02:31:56,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585166151] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:31:56,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718620675] [2021-12-16 02:31:56,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:56,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:31:56,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:31:56,722 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:31:56,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 02:31:56,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:56,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 02:31:56,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:31:56,899 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-16 02:31:56,899 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 02:31:56,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718620675] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:31:56,899 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 02:31:56,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-16 02:31:56,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302611841] [2021-12-16 02:31:56,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:31:56,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:31:56,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:31:56,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:31:56,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:31:56,902 INFO L87 Difference]: Start difference. First operand 4549 states and 5680 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-16 02:31:57,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:31:57,105 INFO L93 Difference]: Finished difference Result 6436 states and 8440 transitions. [2021-12-16 02:31:57,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:31:57,106 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 111 [2021-12-16 02:31:57,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:31:57,118 INFO L225 Difference]: With dead ends: 6436 [2021-12-16 02:31:57,119 INFO L226 Difference]: Without dead ends: 4867 [2021-12-16 02:31:57,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:31:57,125 INFO L933 BasicCegarLoop]: 434 mSDtfsCounter, 140 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:31:57,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 750 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:31:57,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4867 states. [2021-12-16 02:31:57,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4867 to 4867. [2021-12-16 02:31:57,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4867 states, 3862 states have (on average 1.264629725530813) internal successors, (4884), 3935 states have internal predecessors, (4884), 513 states have call successors, (513), 391 states have call predecessors, (513), 490 states have return successors, (733), 544 states have call predecessors, (733), 510 states have call successors, (733) [2021-12-16 02:31:57,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4867 states to 4867 states and 6130 transitions. [2021-12-16 02:31:57,352 INFO L78 Accepts]: Start accepts. Automaton has 4867 states and 6130 transitions. Word has length 111 [2021-12-16 02:31:57,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:31:57,352 INFO L470 AbstractCegarLoop]: Abstraction has 4867 states and 6130 transitions. [2021-12-16 02:31:57,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-16 02:31:57,353 INFO L276 IsEmpty]: Start isEmpty. Operand 4867 states and 6130 transitions. [2021-12-16 02:31:57,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-16 02:31:57,356 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:31:57,357 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:31:57,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 02:31:57,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-16 02:31:57,575 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:31:57,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:31:57,575 INFO L85 PathProgramCache]: Analyzing trace with hash -878802759, now seen corresponding path program 1 times [2021-12-16 02:31:57,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:31:57,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115060814] [2021-12-16 02:31:57,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:57,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:31:57,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:57,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:31:57,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:57,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:31:57,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:57,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-16 02:31:57,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:57,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 02:31:57,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:57,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:31:57,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:57,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 02:31:57,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:57,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-16 02:31:57,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:57,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-16 02:31:57,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:57,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-16 02:31:57,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:57,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-16 02:31:57,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:57,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-16 02:31:57,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:57,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 02:31:57,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:57,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:31:57,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:57,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-16 02:31:57,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:57,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-16 02:31:57,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:57,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-16 02:31:57,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:57,659 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-16 02:31:57,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:31:57,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115060814] [2021-12-16 02:31:57,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115060814] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:31:57,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274928825] [2021-12-16 02:31:57,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:57,660 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:31:57,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:31:57,661 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:31:57,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 02:31:57,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:57,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-16 02:31:57,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:31:57,896 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 02:31:57,896 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 02:31:57,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274928825] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:31:57,896 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 02:31:57,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 12 [2021-12-16 02:31:57,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684575773] [2021-12-16 02:31:57,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:31:57,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 02:31:57,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:31:57,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 02:31:57,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-12-16 02:31:57,900 INFO L87 Difference]: Start difference. First operand 4867 states and 6130 transitions. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-16 02:31:58,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:31:58,040 INFO L93 Difference]: Finished difference Result 6546 states and 8143 transitions. [2021-12-16 02:31:58,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 02:31:58,041 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 145 [2021-12-16 02:31:58,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:31:58,050 INFO L225 Difference]: With dead ends: 6546 [2021-12-16 02:31:58,050 INFO L226 Difference]: Without dead ends: 3309 [2021-12-16 02:31:58,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-16 02:31:58,056 INFO L933 BasicCegarLoop]: 321 mSDtfsCounter, 34 mSDsluCounter, 1247 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 1568 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:31:58,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 1568 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:31:58,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3309 states. [2021-12-16 02:31:58,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3309 to 3186. [2021-12-16 02:31:58,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3186 states, 2623 states have (on average 1.3015630956919557) internal successors, (3414), 2657 states have internal predecessors, (3414), 305 states have call successors, (305), 208 states have call predecessors, (305), 256 states have return successors, (439), 322 states have call predecessors, (439), 302 states have call successors, (439) [2021-12-16 02:31:58,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3186 states to 3186 states and 4158 transitions. [2021-12-16 02:31:58,187 INFO L78 Accepts]: Start accepts. Automaton has 3186 states and 4158 transitions. Word has length 145 [2021-12-16 02:31:58,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:31:58,187 INFO L470 AbstractCegarLoop]: Abstraction has 3186 states and 4158 transitions. [2021-12-16 02:31:58,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-16 02:31:58,187 INFO L276 IsEmpty]: Start isEmpty. Operand 3186 states and 4158 transitions. [2021-12-16 02:31:58,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-16 02:31:58,191 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:31:58,191 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:31:58,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 02:31:58,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:31:58,404 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:31:58,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:31:58,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1647944136, now seen corresponding path program 1 times [2021-12-16 02:31:58,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:31:58,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973796092] [2021-12-16 02:31:58,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:58,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:31:58,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:58,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:31:58,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:58,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:31:58,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:58,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 02:31:58,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:58,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 02:31:58,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:58,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:31:58,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:58,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-16 02:31:58,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:58,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:31:58,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:58,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2021-12-16 02:31:58,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:58,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:31:58,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:58,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-16 02:31:58,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:58,478 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-16 02:31:58,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:31:58,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973796092] [2021-12-16 02:31:58,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973796092] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:31:58,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558652810] [2021-12-16 02:31:58,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:58,479 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:31:58,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:31:58,480 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:31:58,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 02:31:58,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:58,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 02:31:58,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:31:58,739 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-16 02:31:58,740 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 02:31:58,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558652810] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:31:58,740 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 02:31:58,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-16 02:31:58,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399728523] [2021-12-16 02:31:58,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:31:58,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:31:58,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:31:58,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:31:58,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:31:58,742 INFO L87 Difference]: Start difference. First operand 3186 states and 4158 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-16 02:31:58,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:31:58,927 INFO L93 Difference]: Finished difference Result 6339 states and 8773 transitions. [2021-12-16 02:31:58,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:31:58,928 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 143 [2021-12-16 02:31:58,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:31:58,959 INFO L225 Difference]: With dead ends: 6339 [2021-12-16 02:31:58,959 INFO L226 Difference]: Without dead ends: 4732 [2021-12-16 02:31:58,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:31:58,964 INFO L933 BasicCegarLoop]: 328 mSDtfsCounter, 233 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:31:58,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 496 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:31:58,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4732 states. [2021-12-16 02:31:59,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4732 to 4698. [2021-12-16 02:31:59,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4698 states, 3889 states have (on average 1.3373617896631524) internal successors, (5201), 3942 states have internal predecessors, (5201), 451 states have call successors, (451), 298 states have call predecessors, (451), 356 states have return successors, (651), 459 states have call predecessors, (651), 448 states have call successors, (651) [2021-12-16 02:31:59,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4698 states to 4698 states and 6303 transitions. [2021-12-16 02:31:59,150 INFO L78 Accepts]: Start accepts. Automaton has 4698 states and 6303 transitions. Word has length 143 [2021-12-16 02:31:59,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:31:59,151 INFO L470 AbstractCegarLoop]: Abstraction has 4698 states and 6303 transitions. [2021-12-16 02:31:59,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-16 02:31:59,151 INFO L276 IsEmpty]: Start isEmpty. Operand 4698 states and 6303 transitions. [2021-12-16 02:31:59,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-12-16 02:31:59,156 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:31:59,156 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:31:59,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-16 02:31:59,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:31:59,373 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:31:59,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:31:59,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1613614096, now seen corresponding path program 1 times [2021-12-16 02:31:59,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:31:59,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504114298] [2021-12-16 02:31:59,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:59,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:31:59,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:59,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:31:59,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:59,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:31:59,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:59,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 02:31:59,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:59,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 02:31:59,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:59,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:31:59,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:59,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-16 02:31:59,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:59,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:31:59,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:59,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2021-12-16 02:31:59,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:59,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:31:59,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:59,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-16 02:31:59,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:59,451 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-16 02:31:59,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:31:59,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504114298] [2021-12-16 02:31:59,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504114298] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:31:59,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193262500] [2021-12-16 02:31:59,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:31:59,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:31:59,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:31:59,453 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:31:59,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 02:31:59,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:31:59,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 02:31:59,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:31:59,758 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-16 02:31:59,758 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 02:31:59,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193262500] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:31:59,758 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 02:31:59,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-12-16 02:31:59,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877218789] [2021-12-16 02:31:59,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:31:59,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:31:59,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:31:59,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:31:59,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:31:59,760 INFO L87 Difference]: Start difference. First operand 4698 states and 6303 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-16 02:31:59,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:31:59,976 INFO L93 Difference]: Finished difference Result 9080 states and 12660 transitions. [2021-12-16 02:31:59,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:31:59,977 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 143 [2021-12-16 02:31:59,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:31:59,996 INFO L225 Difference]: With dead ends: 9080 [2021-12-16 02:31:59,997 INFO L226 Difference]: Without dead ends: 6550 [2021-12-16 02:32:00,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:32:00,007 INFO L933 BasicCegarLoop]: 350 mSDtfsCounter, 234 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:32:00,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 518 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:32:00,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6550 states. [2021-12-16 02:32:00,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6550 to 6498. [2021-12-16 02:32:00,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6498 states, 5409 states have (on average 1.3595858753928638) internal successors, (7354), 5480 states have internal predecessors, (7354), 615 states have call successors, (615), 402 states have call predecessors, (615), 472 states have return successors, (873), 617 states have call predecessors, (873), 612 states have call successors, (873) [2021-12-16 02:32:00,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6498 states to 6498 states and 8842 transitions. [2021-12-16 02:32:00,386 INFO L78 Accepts]: Start accepts. Automaton has 6498 states and 8842 transitions. Word has length 143 [2021-12-16 02:32:00,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:32:00,386 INFO L470 AbstractCegarLoop]: Abstraction has 6498 states and 8842 transitions. [2021-12-16 02:32:00,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-12-16 02:32:00,386 INFO L276 IsEmpty]: Start isEmpty. Operand 6498 states and 8842 transitions. [2021-12-16 02:32:00,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-16 02:32:00,393 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:32:00,393 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:32:00,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-16 02:32:00,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-16 02:32:00,604 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:32:00,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:32:00,605 INFO L85 PathProgramCache]: Analyzing trace with hash 50370099, now seen corresponding path program 1 times [2021-12-16 02:32:00,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:32:00,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601780440] [2021-12-16 02:32:00,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:32:00,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:32:00,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:00,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:32:00,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:00,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:32:00,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:00,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-16 02:32:00,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:00,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 02:32:00,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:00,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:32:00,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:00,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 02:32:00,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:00,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-16 02:32:00,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:00,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-16 02:32:00,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:00,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-16 02:32:00,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:00,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-16 02:32:00,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:00,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-16 02:32:00,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:00,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 02:32:00,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:00,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:32:00,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:00,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-16 02:32:00,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:00,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-16 02:32:00,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:00,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-16 02:32:00,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:00,683 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-16 02:32:00,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:32:00,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601780440] [2021-12-16 02:32:00,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601780440] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:32:00,683 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:32:00,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 02:32:00,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776191346] [2021-12-16 02:32:00,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:32:00,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 02:32:00,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:32:00,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 02:32:00,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:32:00,685 INFO L87 Difference]: Start difference. First operand 6498 states and 8842 transitions. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-16 02:32:01,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:32:01,278 INFO L93 Difference]: Finished difference Result 7781 states and 10362 transitions. [2021-12-16 02:32:01,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 02:32:01,279 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 159 [2021-12-16 02:32:01,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:32:01,294 INFO L225 Difference]: With dead ends: 7781 [2021-12-16 02:32:01,295 INFO L226 Difference]: Without dead ends: 6391 [2021-12-16 02:32:01,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-16 02:32:01,300 INFO L933 BasicCegarLoop]: 331 mSDtfsCounter, 276 mSDsluCounter, 851 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 1182 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 02:32:01,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 1182 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 02:32:01,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6391 states. [2021-12-16 02:32:01,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6391 to 6245. [2021-12-16 02:32:01,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6245 states, 5207 states have (on average 1.368158248511619) internal successors, (7124), 5278 states have internal predecessors, (7124), 590 states have call successors, (590), 381 states have call predecessors, (590), 446 states have return successors, (835), 587 states have call predecessors, (835), 587 states have call successors, (835) [2021-12-16 02:32:01,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6245 states to 6245 states and 8549 transitions. [2021-12-16 02:32:01,540 INFO L78 Accepts]: Start accepts. Automaton has 6245 states and 8549 transitions. Word has length 159 [2021-12-16 02:32:01,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:32:01,541 INFO L470 AbstractCegarLoop]: Abstraction has 6245 states and 8549 transitions. [2021-12-16 02:32:01,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-16 02:32:01,541 INFO L276 IsEmpty]: Start isEmpty. Operand 6245 states and 8549 transitions. [2021-12-16 02:32:01,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-16 02:32:01,547 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:32:01,547 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:32:01,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-16 02:32:01,548 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:32:01,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:32:01,548 INFO L85 PathProgramCache]: Analyzing trace with hash 2115413199, now seen corresponding path program 1 times [2021-12-16 02:32:01,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:32:01,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447833947] [2021-12-16 02:32:01,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:32:01,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:32:01,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:01,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:32:01,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:01,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:32:01,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:01,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-16 02:32:01,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:01,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 02:32:01,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:01,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:32:01,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:01,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-16 02:32:01,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:01,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-16 02:32:01,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:01,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-16 02:32:01,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:01,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-16 02:32:01,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:01,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-16 02:32:01,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:01,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-16 02:32:01,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:01,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-16 02:32:01,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:01,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 02:32:01,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:01,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-16 02:32:01,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:01,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-16 02:32:01,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:01,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-16 02:32:01,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:01,677 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 25 proven. 7 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-16 02:32:01,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:32:01,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447833947] [2021-12-16 02:32:01,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447833947] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:32:01,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891624950] [2021-12-16 02:32:01,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:32:01,678 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:32:01,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:32:01,679 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:32:01,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 02:32:01,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:01,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-16 02:32:01,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:32:02,034 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-16 02:32:02,034 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 02:32:02,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891624950] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:32:02,035 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 02:32:02,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2021-12-16 02:32:02,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365845476] [2021-12-16 02:32:02,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:32:02,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 02:32:02,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:32:02,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 02:32:02,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-12-16 02:32:02,037 INFO L87 Difference]: Start difference. First operand 6245 states and 8549 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-16 02:32:02,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:32:02,422 INFO L93 Difference]: Finished difference Result 8571 states and 11357 transitions. [2021-12-16 02:32:02,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 02:32:02,423 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 162 [2021-12-16 02:32:02,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:32:02,440 INFO L225 Difference]: With dead ends: 8571 [2021-12-16 02:32:02,440 INFO L226 Difference]: Without dead ends: 7161 [2021-12-16 02:32:02,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 191 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-12-16 02:32:02,445 INFO L933 BasicCegarLoop]: 308 mSDtfsCounter, 175 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 02:32:02,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 632 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 02:32:02,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7161 states. [2021-12-16 02:32:02,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7161 to 7119. [2021-12-16 02:32:02,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7119 states, 5938 states have (on average 1.3406871000336813) internal successors, (7961), 6013 states have internal predecessors, (7961), 660 states have call successors, (660), 432 states have call predecessors, (660), 519 states have return successors, (946), 675 states have call predecessors, (946), 657 states have call successors, (946) [2021-12-16 02:32:02,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7119 states to 7119 states and 9567 transitions. [2021-12-16 02:32:02,726 INFO L78 Accepts]: Start accepts. Automaton has 7119 states and 9567 transitions. Word has length 162 [2021-12-16 02:32:02,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:32:02,727 INFO L470 AbstractCegarLoop]: Abstraction has 7119 states and 9567 transitions. [2021-12-16 02:32:02,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 2 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-12-16 02:32:02,727 INFO L276 IsEmpty]: Start isEmpty. Operand 7119 states and 9567 transitions. [2021-12-16 02:32:02,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-16 02:32:02,732 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:32:02,732 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:32:02,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 02:32:02,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-16 02:32:02,947 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:32:02,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:32:02,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1963717299, now seen corresponding path program 1 times [2021-12-16 02:32:02,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:32:02,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924294097] [2021-12-16 02:32:02,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:32:02,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:32:02,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:02,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:32:02,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:02,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:32:02,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:02,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 02:32:02,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:03,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 02:32:03,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:03,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:32:03,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:03,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-16 02:32:03,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:03,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-16 02:32:03,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:03,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:32:03,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:03,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-16 02:32:03,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:03,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:32:03,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:03,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-16 02:32:03,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:03,032 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-16 02:32:03,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:32:03,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924294097] [2021-12-16 02:32:03,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924294097] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:32:03,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902704584] [2021-12-16 02:32:03,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:32:03,033 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:32:03,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:32:03,034 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:32:03,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 02:32:03,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:03,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 02:32:03,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:32:03,308 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-16 02:32:03,308 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 02:32:03,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902704584] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:32:03,308 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 02:32:03,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-16 02:32:03,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429415424] [2021-12-16 02:32:03,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:32:03,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:32:03,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:32:03,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:32:03,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:32:03,310 INFO L87 Difference]: Start difference. First operand 7119 states and 9567 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-16 02:32:03,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:32:03,626 INFO L93 Difference]: Finished difference Result 12903 states and 17788 transitions. [2021-12-16 02:32:03,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:32:03,627 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 160 [2021-12-16 02:32:03,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:32:03,643 INFO L225 Difference]: With dead ends: 12903 [2021-12-16 02:32:03,643 INFO L226 Difference]: Without dead ends: 7985 [2021-12-16 02:32:03,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:32:03,656 INFO L933 BasicCegarLoop]: 323 mSDtfsCounter, 297 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:32:03,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 357 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:32:03,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7985 states. [2021-12-16 02:32:03,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7985 to 7814. [2021-12-16 02:32:03,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7814 states, 6577 states have (on average 1.3097156758400486) internal successors, (8614), 6646 states have internal predecessors, (8614), 668 states have call successors, (668), 476 states have call predecessors, (668), 567 states have return successors, (946), 693 states have call predecessors, (946), 665 states have call successors, (946) [2021-12-16 02:32:03,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7814 states to 7814 states and 10228 transitions. [2021-12-16 02:32:03,987 INFO L78 Accepts]: Start accepts. Automaton has 7814 states and 10228 transitions. Word has length 160 [2021-12-16 02:32:03,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:32:03,987 INFO L470 AbstractCegarLoop]: Abstraction has 7814 states and 10228 transitions. [2021-12-16 02:32:03,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-16 02:32:03,988 INFO L276 IsEmpty]: Start isEmpty. Operand 7814 states and 10228 transitions. [2021-12-16 02:32:03,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-16 02:32:03,993 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:32:03,993 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:32:04,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-16 02:32:04,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:32:04,199 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:32:04,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:32:04,201 INFO L85 PathProgramCache]: Analyzing trace with hash -2001388946, now seen corresponding path program 1 times [2021-12-16 02:32:04,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:32:04,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566892651] [2021-12-16 02:32:04,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:32:04,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:32:04,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:04,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:32:04,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:04,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:32:04,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:04,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 02:32:04,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:04,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 02:32:04,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:04,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:32:04,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:04,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-16 02:32:04,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:04,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-16 02:32:04,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:04,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:32:04,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:04,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-12-16 02:32:04,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:04,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:32:04,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:04,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-16 02:32:04,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:04,275 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-16 02:32:04,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:32:04,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566892651] [2021-12-16 02:32:04,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566892651] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:32:04,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277046149] [2021-12-16 02:32:04,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:32:04,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:32:04,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:32:04,277 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:32:04,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-16 02:32:04,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:04,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 02:32:04,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:32:04,556 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-16 02:32:04,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 02:32:04,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277046149] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:32:04,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 02:32:04,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-16 02:32:04,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885596157] [2021-12-16 02:32:04,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:32:04,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:32:04,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:32:04,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:32:04,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:32:04,558 INFO L87 Difference]: Start difference. First operand 7814 states and 10228 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-16 02:32:04,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:32:04,901 INFO L93 Difference]: Finished difference Result 13351 states and 17969 transitions. [2021-12-16 02:32:04,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:32:04,902 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 160 [2021-12-16 02:32:04,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:32:04,917 INFO L225 Difference]: With dead ends: 13351 [2021-12-16 02:32:04,918 INFO L226 Difference]: Without dead ends: 7951 [2021-12-16 02:32:04,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:32:04,925 INFO L933 BasicCegarLoop]: 321 mSDtfsCounter, 253 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:32:04,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 367 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:32:04,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7951 states. [2021-12-16 02:32:05,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7951 to 7939. [2021-12-16 02:32:05,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7939 states, 6686 states have (on average 1.291803769069698) internal successors, (8637), 6749 states have internal predecessors, (8637), 666 states have call successors, (666), 492 states have call predecessors, (666), 585 states have return successors, (999), 698 states have call predecessors, (999), 663 states have call successors, (999) [2021-12-16 02:32:05,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7939 states to 7939 states and 10302 transitions. [2021-12-16 02:32:05,259 INFO L78 Accepts]: Start accepts. Automaton has 7939 states and 10302 transitions. Word has length 160 [2021-12-16 02:32:05,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:32:05,259 INFO L470 AbstractCegarLoop]: Abstraction has 7939 states and 10302 transitions. [2021-12-16 02:32:05,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-16 02:32:05,259 INFO L276 IsEmpty]: Start isEmpty. Operand 7939 states and 10302 transitions. [2021-12-16 02:32:05,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-12-16 02:32:05,263 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:32:05,263 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:32:05,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-16 02:32:05,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:32:05,476 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:32:05,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:32:05,476 INFO L85 PathProgramCache]: Analyzing trace with hash 453524583, now seen corresponding path program 1 times [2021-12-16 02:32:05,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:32:05,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959738764] [2021-12-16 02:32:05,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:32:05,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:32:05,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:05,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:32:05,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:05,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:32:05,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:05,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 02:32:05,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:05,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 02:32:05,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:05,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:32:05,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:05,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-16 02:32:05,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:05,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-16 02:32:05,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:05,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:32:05,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:05,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2021-12-16 02:32:05,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:05,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:32:05,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:05,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2021-12-16 02:32:05,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:05,556 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-16 02:32:05,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:32:05,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959738764] [2021-12-16 02:32:05,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959738764] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:32:05,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589146650] [2021-12-16 02:32:05,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:32:05,557 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:32:05,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:32:05,558 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:32:05,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-16 02:32:05,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:05,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 02:32:05,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:32:05,825 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-12-16 02:32:05,825 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 02:32:05,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589146650] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:32:05,825 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 02:32:05,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-16 02:32:05,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428006605] [2021-12-16 02:32:05,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:32:05,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:32:05,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:32:05,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:32:05,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:32:05,827 INFO L87 Difference]: Start difference. First operand 7939 states and 10302 transitions. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-16 02:32:06,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:32:06,274 INFO L93 Difference]: Finished difference Result 13621 states and 17995 transitions. [2021-12-16 02:32:06,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:32:06,275 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 160 [2021-12-16 02:32:06,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:32:06,294 INFO L225 Difference]: With dead ends: 13621 [2021-12-16 02:32:06,294 INFO L226 Difference]: Without dead ends: 7883 [2021-12-16 02:32:06,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:32:06,305 INFO L933 BasicCegarLoop]: 340 mSDtfsCounter, 279 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:32:06,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 504 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:32:06,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7883 states. [2021-12-16 02:32:06,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7883 to 7883. [2021-12-16 02:32:06,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7883 states, 6630 states have (on average 1.2773755656108596) internal successors, (8469), 6693 states have internal predecessors, (8469), 666 states have call successors, (666), 492 states have call predecessors, (666), 585 states have return successors, (999), 698 states have call predecessors, (999), 663 states have call successors, (999) [2021-12-16 02:32:06,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7883 states to 7883 states and 10134 transitions. [2021-12-16 02:32:06,691 INFO L78 Accepts]: Start accepts. Automaton has 7883 states and 10134 transitions. Word has length 160 [2021-12-16 02:32:06,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:32:06,691 INFO L470 AbstractCegarLoop]: Abstraction has 7883 states and 10134 transitions. [2021-12-16 02:32:06,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2021-12-16 02:32:06,691 INFO L276 IsEmpty]: Start isEmpty. Operand 7883 states and 10134 transitions. [2021-12-16 02:32:06,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-16 02:32:06,695 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:32:06,695 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:32:06,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-16 02:32:06,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:32:06,896 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:32:06,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:32:06,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1421882321, now seen corresponding path program 1 times [2021-12-16 02:32:06,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:32:06,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798214471] [2021-12-16 02:32:06,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:32:06,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:32:06,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:06,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:32:06,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:06,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:32:06,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:06,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 02:32:06,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:06,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 02:32:06,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:06,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:32:06,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:06,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-16 02:32:06,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:06,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:32:06,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:06,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-12-16 02:32:06,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:06,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-16 02:32:06,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:06,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:32:06,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:06,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-16 02:32:06,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:06,989 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-16 02:32:06,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:32:06,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798214471] [2021-12-16 02:32:06,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798214471] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:32:06,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551389651] [2021-12-16 02:32:06,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:32:06,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:32:06,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:32:06,991 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:32:07,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-16 02:32:07,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:07,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 02:32:07,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:32:07,262 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-16 02:32:07,262 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 02:32:07,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551389651] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:32:07,262 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 02:32:07,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-16 02:32:07,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956846362] [2021-12-16 02:32:07,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:32:07,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:32:07,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:32:07,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:32:07,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:32:07,264 INFO L87 Difference]: Start difference. First operand 7883 states and 10134 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-16 02:32:07,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:32:07,800 INFO L93 Difference]: Finished difference Result 18971 states and 25116 transitions. [2021-12-16 02:32:07,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:32:07,801 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 161 [2021-12-16 02:32:07,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:32:07,827 INFO L225 Difference]: With dead ends: 18971 [2021-12-16 02:32:07,827 INFO L226 Difference]: Without dead ends: 13289 [2021-12-16 02:32:07,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:32:07,836 INFO L933 BasicCegarLoop]: 464 mSDtfsCounter, 151 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:32:07,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 777 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:32:07,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13289 states. [2021-12-16 02:32:08,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13289 to 13285. [2021-12-16 02:32:08,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13285 states, 11225 states have (on average 1.2871269487750556) internal successors, (14448), 11333 states have internal predecessors, (14448), 1109 states have call successors, (1109), 820 states have call predecessors, (1109), 949 states have return successors, (1915), 1133 states have call predecessors, (1915), 1106 states have call successors, (1915) [2021-12-16 02:32:08,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13285 states to 13285 states and 17472 transitions. [2021-12-16 02:32:08,412 INFO L78 Accepts]: Start accepts. Automaton has 13285 states and 17472 transitions. Word has length 161 [2021-12-16 02:32:08,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:32:08,413 INFO L470 AbstractCegarLoop]: Abstraction has 13285 states and 17472 transitions. [2021-12-16 02:32:08,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-16 02:32:08,413 INFO L276 IsEmpty]: Start isEmpty. Operand 13285 states and 17472 transitions. [2021-12-16 02:32:08,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-16 02:32:08,417 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:32:08,418 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:32:08,435 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-16 02:32:08,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-12-16 02:32:08,632 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:32:08,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:32:08,632 INFO L85 PathProgramCache]: Analyzing trace with hash -831857108, now seen corresponding path program 1 times [2021-12-16 02:32:08,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:32:08,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619908426] [2021-12-16 02:32:08,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:32:08,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:32:08,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:08,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:32:08,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:08,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:32:08,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:08,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 02:32:08,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:08,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 02:32:08,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:08,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:32:08,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:08,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-16 02:32:08,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:08,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-16 02:32:08,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:08,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:32:08,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:08,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-16 02:32:08,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:08,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:32:08,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:08,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-16 02:32:08,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:08,703 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-16 02:32:08,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:32:08,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619908426] [2021-12-16 02:32:08,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619908426] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:32:08,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700533928] [2021-12-16 02:32:08,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:32:08,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:32:08,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:32:08,720 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:32:08,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-16 02:32:08,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:08,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 02:32:08,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:32:08,998 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-16 02:32:08,999 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 02:32:08,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700533928] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:32:08,999 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 02:32:08,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-16 02:32:08,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032038759] [2021-12-16 02:32:08,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:32:09,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:32:09,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:32:09,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:32:09,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:32:09,001 INFO L87 Difference]: Start difference. First operand 13285 states and 17472 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-16 02:32:10,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:32:10,023 INFO L93 Difference]: Finished difference Result 35094 states and 47572 transitions. [2021-12-16 02:32:10,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:32:10,024 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 161 [2021-12-16 02:32:10,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:32:10,090 INFO L225 Difference]: With dead ends: 35094 [2021-12-16 02:32:10,090 INFO L226 Difference]: Without dead ends: 24014 [2021-12-16 02:32:10,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:32:10,109 INFO L933 BasicCegarLoop]: 358 mSDtfsCounter, 278 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:32:10,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 531 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:32:10,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24014 states. [2021-12-16 02:32:11,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24014 to 23842. [2021-12-16 02:32:11,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23842 states, 20218 states have (on average 1.2894450489662677) internal successors, (26070), 20416 states have internal predecessors, (26070), 1963 states have call successors, (1963), 1460 states have call predecessors, (1963), 1659 states have return successors, (4281), 1969 states have call predecessors, (4281), 1960 states have call successors, (4281) [2021-12-16 02:32:11,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23842 states to 23842 states and 32314 transitions. [2021-12-16 02:32:11,359 INFO L78 Accepts]: Start accepts. Automaton has 23842 states and 32314 transitions. Word has length 161 [2021-12-16 02:32:11,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:32:11,359 INFO L470 AbstractCegarLoop]: Abstraction has 23842 states and 32314 transitions. [2021-12-16 02:32:11,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-16 02:32:11,360 INFO L276 IsEmpty]: Start isEmpty. Operand 23842 states and 32314 transitions. [2021-12-16 02:32:11,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-12-16 02:32:11,368 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:32:11,369 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:32:11,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-16 02:32:11,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-12-16 02:32:11,583 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:32:11,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:32:11,584 INFO L85 PathProgramCache]: Analyzing trace with hash 60308522, now seen corresponding path program 1 times [2021-12-16 02:32:11,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:32:11,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778403840] [2021-12-16 02:32:11,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:32:11,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:32:11,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:11,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:32:11,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:11,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:32:11,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:11,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 02:32:11,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:11,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 02:32:11,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:11,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:32:11,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:11,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-12-16 02:32:11,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:11,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2021-12-16 02:32:11,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:11,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:32:11,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:11,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-16 02:32:11,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:11,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:32:11,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:11,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2021-12-16 02:32:11,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:11,630 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-12-16 02:32:11,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:32:11,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778403840] [2021-12-16 02:32:11,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778403840] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:32:11,630 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 02:32:11,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 02:32:11,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094934586] [2021-12-16 02:32:11,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:32:11,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 02:32:11,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:32:11,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 02:32:11,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-16 02:32:11,632 INFO L87 Difference]: Start difference. First operand 23842 states and 32314 transitions. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-16 02:32:12,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:32:12,875 INFO L93 Difference]: Finished difference Result 43512 states and 59209 transitions. [2021-12-16 02:32:12,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 02:32:12,875 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 161 [2021-12-16 02:32:12,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:32:12,925 INFO L225 Difference]: With dead ends: 43512 [2021-12-16 02:32:12,925 INFO L226 Difference]: Without dead ends: 21873 [2021-12-16 02:32:12,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-16 02:32:12,953 INFO L933 BasicCegarLoop]: 308 mSDtfsCounter, 416 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 02:32:12,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [432 Valid, 639 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 02:32:12,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21873 states. [2021-12-16 02:32:13,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21873 to 20174. [2021-12-16 02:32:13,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20174 states, 17080 states have (on average 1.2848946135831383) internal successors, (21946), 17424 states have internal predecessors, (21946), 1525 states have call successors, (1525), 1132 states have call predecessors, (1525), 1567 states have return successors, (3734), 1619 states have call predecessors, (3734), 1522 states have call successors, (3734) [2021-12-16 02:32:14,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20174 states to 20174 states and 27205 transitions. [2021-12-16 02:32:14,131 INFO L78 Accepts]: Start accepts. Automaton has 20174 states and 27205 transitions. Word has length 161 [2021-12-16 02:32:14,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:32:14,132 INFO L470 AbstractCegarLoop]: Abstraction has 20174 states and 27205 transitions. [2021-12-16 02:32:14,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-16 02:32:14,132 INFO L276 IsEmpty]: Start isEmpty. Operand 20174 states and 27205 transitions. [2021-12-16 02:32:14,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-16 02:32:14,139 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:32:14,140 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:32:14,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-12-16 02:32:14,140 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:32:14,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:32:14,140 INFO L85 PathProgramCache]: Analyzing trace with hash -81101080, now seen corresponding path program 1 times [2021-12-16 02:32:14,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:32:14,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099720525] [2021-12-16 02:32:14,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:32:14,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:32:14,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:14,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:32:14,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:14,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:32:14,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:14,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 02:32:14,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:14,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 02:32:14,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:14,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:32:14,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:14,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-16 02:32:14,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:14,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-16 02:32:14,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:14,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:32:14,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:14,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-16 02:32:14,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:14,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:32:14,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:14,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-12-16 02:32:14,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:14,205 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-16 02:32:14,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:32:14,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099720525] [2021-12-16 02:32:14,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099720525] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:32:14,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496641869] [2021-12-16 02:32:14,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:32:14,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:32:14,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:32:14,207 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:32:14,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-16 02:32:14,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:14,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 02:32:14,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:32:14,430 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-16 02:32:14,430 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 02:32:14,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496641869] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:32:14,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 02:32:14,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-16 02:32:14,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185513220] [2021-12-16 02:32:14,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:32:14,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:32:14,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:32:14,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:32:14,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:32:14,433 INFO L87 Difference]: Start difference. First operand 20174 states and 27205 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-16 02:32:15,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:32:15,492 INFO L93 Difference]: Finished difference Result 29455 states and 41380 transitions. [2021-12-16 02:32:15,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:32:15,492 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 163 [2021-12-16 02:32:15,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:32:15,545 INFO L225 Difference]: With dead ends: 29455 [2021-12-16 02:32:15,545 INFO L226 Difference]: Without dead ends: 20226 [2021-12-16 02:32:15,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:32:15,563 INFO L933 BasicCegarLoop]: 426 mSDtfsCounter, 138 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:32:15,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 728 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:32:15,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20226 states. [2021-12-16 02:32:16,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20226 to 20162. [2021-12-16 02:32:16,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20162 states, 17068 states have (on average 1.268748535270682) internal successors, (21655), 17412 states have internal predecessors, (21655), 1525 states have call successors, (1525), 1132 states have call predecessors, (1525), 1567 states have return successors, (3734), 1619 states have call predecessors, (3734), 1522 states have call successors, (3734) [2021-12-16 02:32:16,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20162 states to 20162 states and 26914 transitions. [2021-12-16 02:32:16,565 INFO L78 Accepts]: Start accepts. Automaton has 20162 states and 26914 transitions. Word has length 163 [2021-12-16 02:32:16,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:32:16,566 INFO L470 AbstractCegarLoop]: Abstraction has 20162 states and 26914 transitions. [2021-12-16 02:32:16,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-12-16 02:32:16,566 INFO L276 IsEmpty]: Start isEmpty. Operand 20162 states and 26914 transitions. [2021-12-16 02:32:16,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-16 02:32:16,573 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:32:16,573 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:32:16,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-16 02:32:16,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-16 02:32:16,790 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:32:16,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:32:16,790 INFO L85 PathProgramCache]: Analyzing trace with hash -929152312, now seen corresponding path program 1 times [2021-12-16 02:32:16,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:32:16,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157269859] [2021-12-16 02:32:16,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:32:16,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:32:16,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:16,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:32:16,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:16,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:32:16,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:16,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 02:32:16,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:16,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 02:32:16,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:16,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:32:16,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:16,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-16 02:32:16,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:16,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-16 02:32:16,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:16,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:32:16,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:16,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2021-12-16 02:32:16,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:16,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:32:16,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:16,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2021-12-16 02:32:16,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:16,858 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-16 02:32:16,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:32:16,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157269859] [2021-12-16 02:32:16,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157269859] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:32:16,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035904665] [2021-12-16 02:32:16,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:32:16,859 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:32:16,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:32:16,860 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:32:16,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-16 02:32:16,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:16,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 02:32:16,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:32:17,111 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-16 02:32:17,111 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 02:32:17,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035904665] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:32:17,111 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 02:32:17,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-16 02:32:17,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370839507] [2021-12-16 02:32:17,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:32:17,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:32:17,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:32:17,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:32:17,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:32:17,114 INFO L87 Difference]: Start difference. First operand 20162 states and 26914 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-16 02:32:18,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:32:18,197 INFO L93 Difference]: Finished difference Result 39379 states and 54061 transitions. [2021-12-16 02:32:18,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:32:18,197 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 163 [2021-12-16 02:32:18,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:32:18,252 INFO L225 Difference]: With dead ends: 39379 [2021-12-16 02:32:18,252 INFO L226 Difference]: Without dead ends: 21422 [2021-12-16 02:32:18,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:32:18,277 INFO L933 BasicCegarLoop]: 314 mSDtfsCounter, 266 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:32:18,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 345 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:32:18,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21422 states. [2021-12-16 02:32:19,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21422 to 19088. [2021-12-16 02:32:19,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19088 states, 16254 states have (on average 1.2326811861695584) internal successors, (20036), 16586 states have internal predecessors, (20036), 1365 states have call successors, (1365), 1048 states have call predecessors, (1365), 1467 states have return successors, (3060), 1455 states have call predecessors, (3060), 1362 states have call successors, (3060) [2021-12-16 02:32:19,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19088 states to 19088 states and 24461 transitions. [2021-12-16 02:32:19,421 INFO L78 Accepts]: Start accepts. Automaton has 19088 states and 24461 transitions. Word has length 163 [2021-12-16 02:32:19,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:32:19,422 INFO L470 AbstractCegarLoop]: Abstraction has 19088 states and 24461 transitions. [2021-12-16 02:32:19,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-16 02:32:19,422 INFO L276 IsEmpty]: Start isEmpty. Operand 19088 states and 24461 transitions. [2021-12-16 02:32:19,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-12-16 02:32:19,429 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:32:19,429 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:32:19,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-16 02:32:19,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-12-16 02:32:19,630 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:32:19,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:32:19,631 INFO L85 PathProgramCache]: Analyzing trace with hash 282552368, now seen corresponding path program 1 times [2021-12-16 02:32:19,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:32:19,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058904542] [2021-12-16 02:32:19,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:32:19,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:32:19,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:19,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:32:19,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:19,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:32:19,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:19,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 02:32:19,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:19,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 02:32:19,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:19,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:32:19,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:19,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-16 02:32:19,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:19,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-16 02:32:19,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:19,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:32:19,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:19,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-16 02:32:19,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:19,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:32:19,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:19,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-16 02:32:19,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:19,706 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-16 02:32:19,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:32:19,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058904542] [2021-12-16 02:32:19,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058904542] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:32:19,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279824303] [2021-12-16 02:32:19,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:32:19,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:32:19,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:32:19,708 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:32:19,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-16 02:32:19,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:19,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 02:32:19,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:32:20,002 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-12-16 02:32:20,002 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 02:32:20,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279824303] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:32:20,003 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 02:32:20,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2021-12-16 02:32:20,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432937608] [2021-12-16 02:32:20,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:32:20,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 02:32:20,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:32:20,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 02:32:20,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-16 02:32:20,004 INFO L87 Difference]: Start difference. First operand 19088 states and 24461 transitions. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-16 02:32:21,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:32:21,274 INFO L93 Difference]: Finished difference Result 35891 states and 46479 transitions. [2021-12-16 02:32:21,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 02:32:21,275 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 165 [2021-12-16 02:32:21,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:32:21,321 INFO L225 Difference]: With dead ends: 35891 [2021-12-16 02:32:21,321 INFO L226 Difference]: Without dead ends: 19008 [2021-12-16 02:32:21,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-16 02:32:21,348 INFO L933 BasicCegarLoop]: 282 mSDtfsCounter, 357 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 02:32:21,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 577 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 02:32:21,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19008 states. [2021-12-16 02:32:22,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19008 to 19008. [2021-12-16 02:32:22,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19008 states, 16174 states have (on average 1.2076171633485842) internal successors, (19532), 16506 states have internal predecessors, (19532), 1365 states have call successors, (1365), 1048 states have call predecessors, (1365), 1467 states have return successors, (3060), 1455 states have call predecessors, (3060), 1362 states have call successors, (3060) [2021-12-16 02:32:22,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19008 states to 19008 states and 23957 transitions. [2021-12-16 02:32:22,370 INFO L78 Accepts]: Start accepts. Automaton has 19008 states and 23957 transitions. Word has length 165 [2021-12-16 02:32:22,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:32:22,371 INFO L470 AbstractCegarLoop]: Abstraction has 19008 states and 23957 transitions. [2021-12-16 02:32:22,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-16 02:32:22,371 INFO L276 IsEmpty]: Start isEmpty. Operand 19008 states and 23957 transitions. [2021-12-16 02:32:22,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-12-16 02:32:22,378 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:32:22,378 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:32:22,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-12-16 02:32:22,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:32:22,578 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:32:22,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:32:22,579 INFO L85 PathProgramCache]: Analyzing trace with hash 770599474, now seen corresponding path program 1 times [2021-12-16 02:32:22,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:32:22,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987556134] [2021-12-16 02:32:22,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:32:22,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:32:22,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:22,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:32:22,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:22,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:32:22,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:22,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 02:32:22,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:22,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 02:32:22,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:22,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:32:22,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:22,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-16 02:32:22,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:22,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-16 02:32:22,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:22,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:32:22,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:22,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-16 02:32:22,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:22,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:32:22,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:22,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-16 02:32:22,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:22,640 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-16 02:32:22,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:32:22,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987556134] [2021-12-16 02:32:22,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987556134] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:32:22,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071605488] [2021-12-16 02:32:22,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:32:22,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:32:22,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:32:22,642 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:32:22,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-16 02:32:22,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:22,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 02:32:22,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:32:22,903 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-12-16 02:32:22,903 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 02:32:22,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071605488] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:32:22,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 02:32:22,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 10 [2021-12-16 02:32:22,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090406368] [2021-12-16 02:32:22,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:32:22,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 02:32:22,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:32:22,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 02:32:22,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-16 02:32:22,906 INFO L87 Difference]: Start difference. First operand 19008 states and 23957 transitions. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-16 02:32:24,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:32:24,015 INFO L93 Difference]: Finished difference Result 35711 states and 45619 transitions. [2021-12-16 02:32:24,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 02:32:24,015 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 165 [2021-12-16 02:32:24,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:32:24,145 INFO L225 Difference]: With dead ends: 35711 [2021-12-16 02:32:24,145 INFO L226 Difference]: Without dead ends: 18904 [2021-12-16 02:32:24,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-16 02:32:24,170 INFO L933 BasicCegarLoop]: 279 mSDtfsCounter, 351 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 02:32:24,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 570 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 02:32:24,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18904 states. [2021-12-16 02:32:25,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18904 to 18904. [2021-12-16 02:32:25,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18904 states, 16070 states have (on average 1.1771001866832607) internal successors, (18916), 16402 states have internal predecessors, (18916), 1365 states have call successors, (1365), 1048 states have call predecessors, (1365), 1467 states have return successors, (3020), 1455 states have call predecessors, (3020), 1362 states have call successors, (3020) [2021-12-16 02:32:25,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18904 states to 18904 states and 23301 transitions. [2021-12-16 02:32:25,500 INFO L78 Accepts]: Start accepts. Automaton has 18904 states and 23301 transitions. Word has length 165 [2021-12-16 02:32:25,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:32:25,501 INFO L470 AbstractCegarLoop]: Abstraction has 18904 states and 23301 transitions. [2021-12-16 02:32:25,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 4 states have internal predecessors, (100), 2 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-16 02:32:25,501 INFO L276 IsEmpty]: Start isEmpty. Operand 18904 states and 23301 transitions. [2021-12-16 02:32:25,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-12-16 02:32:25,507 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:32:25,507 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:32:25,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-16 02:32:25,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-12-16 02:32:25,708 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:32:25,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:32:25,709 INFO L85 PathProgramCache]: Analyzing trace with hash -322035728, now seen corresponding path program 1 times [2021-12-16 02:32:25,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:32:25,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226023183] [2021-12-16 02:32:25,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:32:25,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:32:25,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:25,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:32:25,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:25,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:32:25,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:25,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 02:32:25,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:25,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 02:32:25,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:25,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:32:25,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:25,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-16 02:32:25,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:25,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-16 02:32:25,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:25,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:32:25,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:25,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-16 02:32:25,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:25,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:32:25,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:25,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-16 02:32:25,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:25,783 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-16 02:32:25,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:32:25,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226023183] [2021-12-16 02:32:25,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226023183] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:32:25,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140265918] [2021-12-16 02:32:25,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:32:25,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:32:25,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:32:25,785 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:32:25,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-16 02:32:25,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:25,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 02:32:25,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:32:26,048 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-16 02:32:26,049 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 02:32:26,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140265918] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:32:26,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 02:32:26,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 7 [2021-12-16 02:32:26,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850673884] [2021-12-16 02:32:26,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:32:26,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 02:32:26,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:32:26,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 02:32:26,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:32:26,050 INFO L87 Difference]: Start difference. First operand 18904 states and 23301 transitions. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-16 02:32:27,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:32:27,092 INFO L93 Difference]: Finished difference Result 35336 states and 44595 transitions. [2021-12-16 02:32:27,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 02:32:27,093 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 165 [2021-12-16 02:32:27,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:32:27,132 INFO L225 Difference]: With dead ends: 35336 [2021-12-16 02:32:27,132 INFO L226 Difference]: Without dead ends: 18635 [2021-12-16 02:32:27,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 185 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-16 02:32:27,155 INFO L933 BasicCegarLoop]: 307 mSDtfsCounter, 49 mSDsluCounter, 935 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 1242 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:32:27,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 1242 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:32:27,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18635 states. [2021-12-16 02:32:28,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18635 to 18243. [2021-12-16 02:32:28,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18243 states, 15429 states have (on average 1.1585326333527772) internal successors, (17875), 15747 states have internal predecessors, (17875), 1365 states have call successors, (1365), 1048 states have call predecessors, (1365), 1447 states have return successors, (2798), 1449 states have call predecessors, (2798), 1362 states have call successors, (2798) [2021-12-16 02:32:28,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18243 states to 18243 states and 22038 transitions. [2021-12-16 02:32:28,166 INFO L78 Accepts]: Start accepts. Automaton has 18243 states and 22038 transitions. Word has length 165 [2021-12-16 02:32:28,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:32:28,166 INFO L470 AbstractCegarLoop]: Abstraction has 18243 states and 22038 transitions. [2021-12-16 02:32:28,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-16 02:32:28,167 INFO L276 IsEmpty]: Start isEmpty. Operand 18243 states and 22038 transitions. [2021-12-16 02:32:28,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2021-12-16 02:32:28,171 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:32:28,172 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:32:28,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-16 02:32:28,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-16 02:32:28,372 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:32:28,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:32:28,373 INFO L85 PathProgramCache]: Analyzing trace with hash -490424150, now seen corresponding path program 1 times [2021-12-16 02:32:28,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:32:28,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20978854] [2021-12-16 02:32:28,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:32:28,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:32:28,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:28,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:32:28,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:28,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:32:28,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:28,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 02:32:28,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:28,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 02:32:28,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:28,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:32:28,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:28,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-16 02:32:28,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:28,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-16 02:32:28,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:28,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:32:28,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:28,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-12-16 02:32:28,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:28,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:32:28,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:28,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2021-12-16 02:32:28,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:28,445 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-12-16 02:32:28,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:32:28,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20978854] [2021-12-16 02:32:28,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20978854] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:32:28,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548452640] [2021-12-16 02:32:28,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:32:28,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:32:28,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:32:28,446 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:32:28,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-16 02:32:28,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:28,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-16 02:32:28,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:32:28,709 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-16 02:32:28,709 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 02:32:28,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548452640] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:32:28,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 02:32:28,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 7 [2021-12-16 02:32:28,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790289234] [2021-12-16 02:32:28,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:32:28,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-16 02:32:28,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:32:28,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-16 02:32:28,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 02:32:28,710 INFO L87 Difference]: Start difference. First operand 18243 states and 22038 transitions. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-16 02:32:29,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:32:29,702 INFO L93 Difference]: Finished difference Result 28847 states and 35228 transitions. [2021-12-16 02:32:29,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 02:32:29,702 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 165 [2021-12-16 02:32:29,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:32:29,740 INFO L225 Difference]: With dead ends: 28847 [2021-12-16 02:32:29,740 INFO L226 Difference]: Without dead ends: 16597 [2021-12-16 02:32:29,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 185 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-16 02:32:29,761 INFO L933 BasicCegarLoop]: 307 mSDtfsCounter, 10 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1227 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:32:29,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 1227 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:32:29,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16597 states. [2021-12-16 02:32:30,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16597 to 16557. [2021-12-16 02:32:30,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16557 states, 14121 states have (on average 1.1404999645917429) internal successors, (16105), 14301 states have internal predecessors, (16105), 1245 states have call successors, (1245), 960 states have call predecessors, (1245), 1189 states have return successors, (1995), 1297 states have call predecessors, (1995), 1242 states have call successors, (1995) [2021-12-16 02:32:30,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16557 states to 16557 states and 19345 transitions. [2021-12-16 02:32:30,755 INFO L78 Accepts]: Start accepts. Automaton has 16557 states and 19345 transitions. Word has length 165 [2021-12-16 02:32:30,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:32:30,755 INFO L470 AbstractCegarLoop]: Abstraction has 16557 states and 19345 transitions. [2021-12-16 02:32:30,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-16 02:32:30,755 INFO L276 IsEmpty]: Start isEmpty. Operand 16557 states and 19345 transitions. [2021-12-16 02:32:30,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-12-16 02:32:30,763 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:32:30,763 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:32:30,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-16 02:32:30,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-16 02:32:30,963 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:32:30,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:32:30,964 INFO L85 PathProgramCache]: Analyzing trace with hash 994864062, now seen corresponding path program 1 times [2021-12-16 02:32:30,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:32:30,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132274432] [2021-12-16 02:32:30,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:32:30,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:32:30,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:30,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:32:30,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:31,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:32:31,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:31,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 02:32:31,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:31,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 02:32:31,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:31,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:32:31,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:31,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-16 02:32:31,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:31,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:32:31,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:31,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-16 02:32:31,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:31,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2021-12-16 02:32:31,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:31,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:32:31,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:31,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2021-12-16 02:32:31,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:31,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:32:31,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:31,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 185 [2021-12-16 02:32:31,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:31,044 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 29 proven. 3 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-12-16 02:32:31,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:32:31,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132274432] [2021-12-16 02:32:31,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132274432] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:32:31,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239822026] [2021-12-16 02:32:31,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:32:31,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:32:31,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:32:31,046 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:32:31,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-16 02:32:31,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:31,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 02:32:31,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:32:31,305 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-12-16 02:32:31,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 02:32:31,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239822026] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:32:31,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 02:32:31,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-16 02:32:31,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791611496] [2021-12-16 02:32:31,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:32:31,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:32:31,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:32:31,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:32:31,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:32:31,309 INFO L87 Difference]: Start difference. First operand 16557 states and 19345 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-16 02:32:32,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 02:32:32,125 INFO L93 Difference]: Finished difference Result 26070 states and 30581 transitions. [2021-12-16 02:32:32,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 02:32:32,125 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) Word has length 200 [2021-12-16 02:32:32,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 02:32:32,148 INFO L225 Difference]: With dead ends: 26070 [2021-12-16 02:32:32,148 INFO L226 Difference]: Without dead ends: 15780 [2021-12-16 02:32:32,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-16 02:32:32,157 INFO L933 BasicCegarLoop]: 399 mSDtfsCounter, 137 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 02:32:32,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 699 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 02:32:32,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15780 states. [2021-12-16 02:32:32,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15780 to 15776. [2021-12-16 02:32:32,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15776 states, 13456 states have (on average 1.1379310344827587) internal successors, (15312), 13630 states have internal predecessors, (15312), 1183 states have call successors, (1183), 910 states have call predecessors, (1183), 1135 states have return successors, (1881), 1237 states have call predecessors, (1881), 1180 states have call successors, (1881) [2021-12-16 02:32:32,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15776 states to 15776 states and 18376 transitions. [2021-12-16 02:32:32,939 INFO L78 Accepts]: Start accepts. Automaton has 15776 states and 18376 transitions. Word has length 200 [2021-12-16 02:32:32,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 02:32:32,939 INFO L470 AbstractCegarLoop]: Abstraction has 15776 states and 18376 transitions. [2021-12-16 02:32:32,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-16 02:32:32,940 INFO L276 IsEmpty]: Start isEmpty. Operand 15776 states and 18376 transitions. [2021-12-16 02:32:32,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-12-16 02:32:32,944 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 02:32:32,944 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 02:32:32,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-12-16 02:32:33,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:32:33,145 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 02:32:33,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 02:32:33,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1498322473, now seen corresponding path program 1 times [2021-12-16 02:32:33,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 02:32:33,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405736162] [2021-12-16 02:32:33,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:32:33,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 02:32:33,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:33,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-16 02:32:33,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:33,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 02:32:33,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:33,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 02:32:33,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:33,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-16 02:32:33,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:33,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-16 02:32:33,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:33,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2021-12-16 02:32:33,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:33,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-12-16 02:32:33,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:33,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:32:33,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:33,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-16 02:32:33,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:33,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:32:33,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:33,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2021-12-16 02:32:33,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:33,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-12-16 02:32:33,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:33,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2021-12-16 02:32:33,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:33,213 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 53 proven. 41 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-12-16 02:32:33,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 02:32:33,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405736162] [2021-12-16 02:32:33,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405736162] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 02:32:33,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472669709] [2021-12-16 02:32:33,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 02:32:33,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 02:32:33,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 02:32:33,214 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 02:32:33,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-16 02:32:33,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 02:32:33,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 655 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 02:32:33,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 02:32:33,526 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 147 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-16 02:32:33,526 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 02:32:33,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472669709] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 02:32:33,526 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 02:32:33,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6 [2021-12-16 02:32:33,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051051294] [2021-12-16 02:32:33,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 02:32:33,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 02:32:33,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 02:32:33,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 02:32:33,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 02:32:33,528 INFO L87 Difference]: Start difference. First operand 15776 states and 18376 transitions. Second operand has 3 states, 3 states have (on average 52.666666666666664) internal successors, (158), 3 states have internal predecessors, (158), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13)