./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.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.04.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 a61ec0d9e8ff01aa8900ac2d4a87b40f68db963fb1a53c6fbb2c11c91e3dd345 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 21:04:55,770 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 21:04:55,772 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 21:04:55,826 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 21:04:55,829 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 21:04:55,830 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 21:04:55,832 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 21:04:55,836 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 21:04:55,838 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 21:04:55,839 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 21:04:55,840 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 21:04:55,841 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 21:04:55,842 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 21:04:55,845 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 21:04:55,846 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 21:04:55,848 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 21:04:55,850 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 21:04:55,854 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 21:04:55,855 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 21:04:55,859 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 21:04:55,862 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 21:04:55,866 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 21:04:55,866 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 21:04:55,867 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 21:04:55,869 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 21:04:55,870 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 21:04:55,871 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 21:04:55,871 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 21:04:55,872 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 21:04:55,873 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 21:04:55,874 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 21:04:55,875 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 21:04:55,876 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 21:04:55,877 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 21:04:55,878 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 21:04:55,878 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 21:04:55,879 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 21:04:55,879 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 21:04:55,880 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 21:04:55,880 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 21:04:55,881 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 21:04:55,881 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 21:04:55,916 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 21:04:55,916 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 21:04:55,917 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 21:04:55,917 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 21:04:55,918 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 21:04:55,918 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 21:04:55,919 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 21:04:55,919 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 21:04:55,919 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 21:04:55,919 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 21:04:55,921 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 21:04:55,921 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 21:04:55,921 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 21:04:55,921 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 21:04:55,921 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 21:04:55,922 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 21:04:55,922 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 21:04:55,922 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 21:04:55,922 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 21:04:55,922 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 21:04:55,922 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 21:04:55,923 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 21:04:55,923 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 21:04:55,923 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 21:04:55,923 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 21:04:55,923 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 21:04:55,924 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 21:04:55,924 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 21:04:55,924 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 21:04:55,924 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 21:04:55,924 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 21:04:55,924 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 21:04:55,925 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 21:04:55,925 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 21:04:55,925 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a61ec0d9e8ff01aa8900ac2d4a87b40f68db963fb1a53c6fbb2c11c91e3dd345 [2021-12-17 21:04:56,156 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 21:04:56,176 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 21:04:56,187 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 21:04:56,188 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 21:04:56,189 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 21:04:56,190 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-2.c [2021-12-17 21:04:56,265 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4490904b3/d3947ff5d1de42a59a8de15fb58bab67/FLAGd91637d89 [2021-12-17 21:04:56,659 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 21:04:56,660 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.04.cil-2.c [2021-12-17 21:04:56,669 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4490904b3/d3947ff5d1de42a59a8de15fb58bab67/FLAGd91637d89 [2021-12-17 21:04:57,050 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4490904b3/d3947ff5d1de42a59a8de15fb58bab67 [2021-12-17 21:04:57,053 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 21:04:57,054 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 21:04:57,061 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 21:04:57,062 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 21:04:57,065 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 21:04:57,066 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:04:57" (1/1) ... [2021-12-17 21:04:57,067 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20cf0e2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:04:57, skipping insertion in model container [2021-12-17 21:04:57,067 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:04:57" (1/1) ... [2021-12-17 21:04:57,073 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 21:04:57,125 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 21:04:57,273 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.04.cil-2.c[914,927] [2021-12-17 21:04:57,318 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.04.cil-2.c[7115,7128] [2021-12-17 21:04:57,356 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 21:04:57,365 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 21:04:57,374 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.04.cil-2.c[914,927] [2021-12-17 21:04:57,393 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.04.cil-2.c[7115,7128] [2021-12-17 21:04:57,431 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 21:04:57,448 INFO L208 MainTranslator]: Completed translation [2021-12-17 21:04:57,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:04:57 WrapperNode [2021-12-17 21:04:57,449 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 21:04:57,450 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 21:04:57,450 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 21:04:57,450 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 21:04:57,455 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:04:57" (1/1) ... [2021-12-17 21:04:57,464 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:04:57" (1/1) ... [2021-12-17 21:04:57,499 INFO L137 Inliner]: procedures = 61, calls = 70, calls flagged for inlining = 29, calls inlined = 29, statements flattened = 581 [2021-12-17 21:04:57,500 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 21:04:57,501 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 21:04:57,501 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 21:04:57,501 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 21:04:57,508 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:04:57" (1/1) ... [2021-12-17 21:04:57,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:04:57" (1/1) ... [2021-12-17 21:04:57,512 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:04:57" (1/1) ... [2021-12-17 21:04:57,512 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:04:57" (1/1) ... [2021-12-17 21:04:57,522 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:04:57" (1/1) ... [2021-12-17 21:04:57,543 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:04:57" (1/1) ... [2021-12-17 21:04:57,546 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:04:57" (1/1) ... [2021-12-17 21:04:57,550 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 21:04:57,550 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 21:04:57,551 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 21:04:57,551 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 21:04:57,559 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:04:57" (1/1) ... [2021-12-17 21:04:57,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 21:04:57,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:04:57,600 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 21:04:57,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 21:04:57,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 21:04:57,639 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-17 21:04:57,639 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-17 21:04:57,639 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-12-17 21:04:57,644 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-12-17 21:04:57,644 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-17 21:04:57,645 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-17 21:04:57,645 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-17 21:04:57,645 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-17 21:04:57,645 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-12-17 21:04:57,645 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-12-17 21:04:57,645 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-17 21:04:57,646 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-17 21:04:57,646 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-17 21:04:57,646 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-17 21:04:57,646 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-12-17 21:04:57,646 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-12-17 21:04:57,646 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-12-17 21:04:57,646 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-12-17 21:04:57,647 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-12-17 21:04:57,647 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-12-17 21:04:57,647 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-17 21:04:57,647 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-17 21:04:57,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 21:04:57,647 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-17 21:04:57,648 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-17 21:04:57,648 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-12-17 21:04:57,648 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-12-17 21:04:57,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 21:04:57,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 21:04:57,648 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-17 21:04:57,648 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-17 21:04:57,649 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-17 21:04:57,649 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-17 21:04:57,783 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 21:04:57,785 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 21:04:58,311 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 21:04:58,328 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 21:04:58,329 INFO L301 CfgBuilder]: Removed 11 assume(true) statements. [2021-12-17 21:04:58,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:04:58 BoogieIcfgContainer [2021-12-17 21:04:58,332 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 21:04:58,334 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 21:04:58,334 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 21:04:58,338 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 21:04:58,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 09:04:57" (1/3) ... [2021-12-17 21:04:58,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@230ad3e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:04:58, skipping insertion in model container [2021-12-17 21:04:58,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:04:57" (2/3) ... [2021-12-17 21:04:58,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@230ad3e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:04:58, skipping insertion in model container [2021-12-17 21:04:58,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:04:58" (3/3) ... [2021-12-17 21:04:58,343 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.04.cil-2.c [2021-12-17 21:04:58,348 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 21:04:58,348 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-17 21:04:58,402 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 21:04:58,410 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 21:04:58,410 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-17 21:04:58,445 INFO L276 IsEmpty]: Start isEmpty. Operand has 291 states, 239 states have (on average 1.594142259414226) internal successors, (381), 247 states have internal predecessors, (381), 34 states have call successors, (34), 15 states have call predecessors, (34), 15 states have return successors, (34), 32 states have call predecessors, (34), 34 states have call successors, (34) [2021-12-17 21:04:58,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 21:04:58,454 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:04:58,455 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] [2021-12-17 21:04:58,456 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:04:58,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:04:58,460 INFO L85 PathProgramCache]: Analyzing trace with hash -496845882, now seen corresponding path program 1 times [2021-12-17 21:04:58,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:04:58,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603187092] [2021-12-17 21:04:58,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:04:58,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:04:58,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:58,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:04:58,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:58,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:04:58,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:58,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:04:58,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:58,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:04:58,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:58,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:04:58,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:58,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:04:58,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:58,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:04:58,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:04:58,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:04:58,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:04:58,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603187092] [2021-12-17 21:04:58,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603187092] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:04:58,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:04:58,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 21:04:58,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801722891] [2021-12-17 21:04:58,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:04:58,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 21:04:58,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:04:58,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 21:04:58,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:04:58,901 INFO L87 Difference]: Start difference. First operand has 291 states, 239 states have (on average 1.594142259414226) internal successors, (381), 247 states have internal predecessors, (381), 34 states have call successors, (34), 15 states have call predecessors, (34), 15 states have return successors, (34), 32 states have call predecessors, (34), 34 states have call successors, (34) 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) [2021-12-17 21:04:59,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:04:59,991 INFO L93 Difference]: Finished difference Result 727 states and 1118 transitions. [2021-12-17 21:04:59,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 21:04:59,993 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 [2021-12-17 21:04:59,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:05:00,006 INFO L225 Difference]: With dead ends: 727 [2021-12-17 21:05:00,007 INFO L226 Difference]: Without dead ends: 446 [2021-12-17 21:05:00,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-12-17 21:05:00,015 INFO L933 BasicCegarLoop]: 483 mSDtfsCounter, 804 mSDsluCounter, 1319 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 827 SdHoareTripleChecker+Valid, 1802 SdHoareTripleChecker+Invalid, 1116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 21:05:00,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [827 Valid, 1802 Invalid, 1116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 982 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 21:05:00,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-12-17 21:05:00,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 380. [2021-12-17 21:05:00,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 310 states have (on average 1.4806451612903226) internal successors, (459), 318 states have internal predecessors, (459), 45 states have call successors, (45), 22 states have call predecessors, (45), 23 states have return successors, (52), 42 states have call predecessors, (52), 41 states have call successors, (52) [2021-12-17 21:05:00,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 556 transitions. [2021-12-17 21:05:00,096 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 556 transitions. Word has length 65 [2021-12-17 21:05:00,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:05:00,096 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 556 transitions. [2021-12-17 21:05:00,097 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) [2021-12-17 21:05:00,097 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 556 transitions. [2021-12-17 21:05:00,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 21:05:00,101 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:05:00,101 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] [2021-12-17 21:05:00,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 21:05:00,101 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:05:00,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:05:00,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1769535304, now seen corresponding path program 1 times [2021-12-17 21:05:00,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:05:00,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003068638] [2021-12-17 21:05:00,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:05:00,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:05:00,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:00,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:05:00,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:00,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:05:00,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:00,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:05:00,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:00,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:05:00,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:00,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:05:00,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:00,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:05:00,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:00,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:05:00,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:00,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:05:00,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:05:00,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003068638] [2021-12-17 21:05:00,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003068638] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:05:00,237 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:05:00,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 21:05:00,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904324161] [2021-12-17 21:05:00,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:05:00,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 21:05:00,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:05:00,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 21:05:00,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-17 21:05:00,241 INFO L87 Difference]: Start difference. First operand 380 states and 556 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) [2021-12-17 21:05:00,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:05:00,976 INFO L93 Difference]: Finished difference Result 591 states and 851 transitions. [2021-12-17 21:05:00,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 21:05:00,977 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 [2021-12-17 21:05:00,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:05:00,983 INFO L225 Difference]: With dead ends: 591 [2021-12-17 21:05:00,983 INFO L226 Difference]: Without dead ends: 410 [2021-12-17 21:05:00,992 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 [2021-12-17 21:05:00,994 INFO L933 BasicCegarLoop]: 406 mSDtfsCounter, 327 mSDsluCounter, 1567 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 1973 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 21:05:00,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 1973 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 879 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 21:05:00,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-12-17 21:05:01,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 390. [2021-12-17 21:05:01,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 318 states have (on average 1.4685534591194969) internal successors, (467), 326 states have internal predecessors, (467), 45 states have call successors, (45), 22 states have call predecessors, (45), 25 states have return successors, (54), 44 states have call predecessors, (54), 41 states have call successors, (54) [2021-12-17 21:05:01,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 566 transitions. [2021-12-17 21:05:01,059 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 566 transitions. Word has length 65 [2021-12-17 21:05:01,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:05:01,060 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 566 transitions. [2021-12-17 21:05:01,060 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) [2021-12-17 21:05:01,061 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 566 transitions. [2021-12-17 21:05:01,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 21:05:01,070 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:05:01,070 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] [2021-12-17 21:05:01,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 21:05:01,071 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:05:01,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:05:01,071 INFO L85 PathProgramCache]: Analyzing trace with hash 740176006, now seen corresponding path program 1 times [2021-12-17 21:05:01,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:05:01,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501554895] [2021-12-17 21:05:01,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:05:01,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:05:01,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:01,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:05:01,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:01,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:05:01,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:01,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:05:01,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:01,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:05:01,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:01,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:05:01,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:01,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:05:01,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:01,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:05:01,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:01,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:05:01,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:05:01,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501554895] [2021-12-17 21:05:01,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501554895] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:05:01,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:05:01,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 21:05:01,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114037723] [2021-12-17 21:05:01,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:05:01,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 21:05:01,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:05:01,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 21:05:01,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-17 21:05:01,235 INFO L87 Difference]: Start difference. First operand 390 states and 566 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) [2021-12-17 21:05:01,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:05:01,931 INFO L93 Difference]: Finished difference Result 615 states and 879 transitions. [2021-12-17 21:05:01,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 21:05:01,932 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 [2021-12-17 21:05:01,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:05:01,935 INFO L225 Difference]: With dead ends: 615 [2021-12-17 21:05:01,935 INFO L226 Difference]: Without dead ends: 424 [2021-12-17 21:05:01,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-12-17 21:05:01,937 INFO L933 BasicCegarLoop]: 402 mSDtfsCounter, 325 mSDsluCounter, 1562 mSDsCounter, 0 mSdLazyCounter, 878 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 1964 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 21:05:01,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 1964 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 878 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-17 21:05:01,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-12-17 21:05:01,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 400. [2021-12-17 21:05:01,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 326 states have (on average 1.4570552147239264) internal successors, (475), 334 states have internal predecessors, (475), 45 states have call successors, (45), 22 states have call predecessors, (45), 27 states have return successors, (56), 46 states have call predecessors, (56), 41 states have call successors, (56) [2021-12-17 21:05:01,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 576 transitions. [2021-12-17 21:05:01,961 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 576 transitions. Word has length 65 [2021-12-17 21:05:01,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:05:01,962 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 576 transitions. [2021-12-17 21:05:01,962 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) [2021-12-17 21:05:01,963 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 576 transitions. [2021-12-17 21:05:01,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 21:05:01,964 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:05:01,964 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] [2021-12-17 21:05:01,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 21:05:01,965 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:05:01,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:05:01,965 INFO L85 PathProgramCache]: Analyzing trace with hash 2126379400, now seen corresponding path program 1 times [2021-12-17 21:05:01,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:05:01,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122122178] [2021-12-17 21:05:01,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:05:01,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:05:01,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:02,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:05:02,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:02,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:05:02,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:02,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:05:02,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:02,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:05:02,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:02,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:05:02,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:02,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:05:02,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:02,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:05:02,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:02,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:05:02,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:05:02,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122122178] [2021-12-17 21:05:02,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122122178] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:05:02,052 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:05:02,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 21:05:02,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535340365] [2021-12-17 21:05:02,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:05:02,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 21:05:02,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:05:02,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 21:05:02,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:05:02,054 INFO L87 Difference]: Start difference. First operand 400 states and 576 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) [2021-12-17 21:05:02,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:05:02,755 INFO L93 Difference]: Finished difference Result 748 states and 1057 transitions. [2021-12-17 21:05:02,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 21:05:02,756 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 [2021-12-17 21:05:02,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:05:02,760 INFO L225 Difference]: With dead ends: 748 [2021-12-17 21:05:02,760 INFO L226 Difference]: Without dead ends: 546 [2021-12-17 21:05:02,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-12-17 21:05:02,762 INFO L933 BasicCegarLoop]: 430 mSDtfsCounter, 544 mSDsluCounter, 985 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 1415 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 21:05:02,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [547 Valid, 1415 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 21:05:02,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-12-17 21:05:02,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 492. [2021-12-17 21:05:02,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 399 states have (on average 1.4285714285714286) internal successors, (570), 408 states have internal predecessors, (570), 56 states have call successors, (56), 29 states have call predecessors, (56), 35 states have return successors, (69), 58 states have call predecessors, (69), 52 states have call successors, (69) [2021-12-17 21:05:02,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 695 transitions. [2021-12-17 21:05:02,790 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 695 transitions. Word has length 65 [2021-12-17 21:05:02,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:05:02,791 INFO L470 AbstractCegarLoop]: Abstraction has 492 states and 695 transitions. [2021-12-17 21:05:02,791 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) [2021-12-17 21:05:02,791 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 695 transitions. [2021-12-17 21:05:02,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 21:05:02,793 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:05:02,793 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:05:02,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 21:05:02,793 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:05:02,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:05:02,794 INFO L85 PathProgramCache]: Analyzing trace with hash -2028039286, now seen corresponding path program 1 times [2021-12-17 21:05:02,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:05:02,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374913598] [2021-12-17 21:05:02,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:05:02,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:05:02,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:02,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:05:02,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:02,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:05:02,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:02,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:05:02,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:02,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:05:02,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:02,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:05:02,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:02,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:05:02,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:02,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:05:02,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:02,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:05:02,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:05:02,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374913598] [2021-12-17 21:05:02,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374913598] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:05:02,895 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:05:02,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 21:05:02,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547389243] [2021-12-17 21:05:02,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:05:02,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 21:05:02,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:05:02,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 21:05:02,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:05:02,897 INFO L87 Difference]: Start difference. First operand 492 states and 695 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) [2021-12-17 21:05:03,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:05:03,703 INFO L93 Difference]: Finished difference Result 884 states and 1206 transitions. [2021-12-17 21:05:03,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 21:05:03,703 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 [2021-12-17 21:05:03,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:05:03,707 INFO L225 Difference]: With dead ends: 884 [2021-12-17 21:05:03,707 INFO L226 Difference]: Without dead ends: 599 [2021-12-17 21:05:03,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-12-17 21:05:03,709 INFO L933 BasicCegarLoop]: 426 mSDtfsCounter, 987 mSDsluCounter, 868 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1010 SdHoareTripleChecker+Valid, 1294 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 21:05:03,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1010 Valid, 1294 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 21:05:03,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-12-17 21:05:03,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 504. [2021-12-17 21:05:03,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 409 states have (on average 1.4180929095354524) internal successors, (580), 418 states have internal predecessors, (580), 57 states have call successors, (57), 30 states have call predecessors, (57), 36 states have return successors, (68), 59 states have call predecessors, (68), 53 states have call successors, (68) [2021-12-17 21:05:03,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 705 transitions. [2021-12-17 21:05:03,750 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 705 transitions. Word has length 65 [2021-12-17 21:05:03,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:05:03,750 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 705 transitions. [2021-12-17 21:05:03,750 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) [2021-12-17 21:05:03,751 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 705 transitions. [2021-12-17 21:05:03,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 21:05:03,752 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:05:03,752 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] [2021-12-17 21:05:03,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 21:05:03,753 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:05:03,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:05:03,753 INFO L85 PathProgramCache]: Analyzing trace with hash 2132914504, now seen corresponding path program 1 times [2021-12-17 21:05:03,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:05:03,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852704410] [2021-12-17 21:05:03,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:05:03,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:05:03,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:03,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:05:03,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:03,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:05:03,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:03,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:05:03,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:03,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:05:03,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:03,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:05:03,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:03,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:05:03,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:03,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:05:03,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:03,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:05:03,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:05:03,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852704410] [2021-12-17 21:05:03,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852704410] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:05:03,829 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:05:03,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:05:03,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842280044] [2021-12-17 21:05:03,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:05:03,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:05:03,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:05:03,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:05:03,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:05:03,833 INFO L87 Difference]: Start difference. First operand 504 states and 705 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) [2021-12-17 21:05:04,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:05:04,196 INFO L93 Difference]: Finished difference Result 1146 states and 1552 transitions. [2021-12-17 21:05:04,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 21:05:04,197 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 [2021-12-17 21:05:04,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:05:04,202 INFO L225 Difference]: With dead ends: 1146 [2021-12-17 21:05:04,202 INFO L226 Difference]: Without dead ends: 850 [2021-12-17 21:05:04,203 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 [2021-12-17 21:05:04,204 INFO L933 BasicCegarLoop]: 384 mSDtfsCounter, 972 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 997 SdHoareTripleChecker+Valid, 991 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 21:05:04,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [997 Valid, 991 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 21:05:04,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2021-12-17 21:05:04,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 794. [2021-12-17 21:05:04,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 633 states have (on average 1.3696682464454977) internal successors, (867), 649 states have internal predecessors, (867), 92 states have call successors, (92), 52 states have call predecessors, (92), 67 states have return successors, (125), 99 states have call predecessors, (125), 88 states have call successors, (125) [2021-12-17 21:05:04,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1084 transitions. [2021-12-17 21:05:04,251 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1084 transitions. Word has length 65 [2021-12-17 21:05:04,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:05:04,252 INFO L470 AbstractCegarLoop]: Abstraction has 794 states and 1084 transitions. [2021-12-17 21:05:04,252 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) [2021-12-17 21:05:04,252 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1084 transitions. [2021-12-17 21:05:04,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-17 21:05:04,254 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:05:04,254 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] [2021-12-17 21:05:04,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 21:05:04,255 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:05:04,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:05:04,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1916035770, now seen corresponding path program 1 times [2021-12-17 21:05:04,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:05:04,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759390230] [2021-12-17 21:05:04,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:05:04,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:05:04,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:04,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:05:04,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:04,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:05:04,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:04,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:05:04,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:04,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:05:04,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:04,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:05:04,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:04,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:05:04,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:04,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:05:04,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:04,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:05:04,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:05:04,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759390230] [2021-12-17 21:05:04,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759390230] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:05:04,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:05:04,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 21:05:04,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437139511] [2021-12-17 21:05:04,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:05:04,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 21:05:04,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:05:04,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 21:05:04,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 21:05:04,324 INFO L87 Difference]: Start difference. First operand 794 states and 1084 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) [2021-12-17 21:05:04,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:05:04,748 INFO L93 Difference]: Finished difference Result 1997 states and 2655 transitions. [2021-12-17 21:05:04,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 21:05:04,749 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 [2021-12-17 21:05:04,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:05:04,756 INFO L225 Difference]: With dead ends: 1997 [2021-12-17 21:05:04,756 INFO L226 Difference]: Without dead ends: 1390 [2021-12-17 21:05:04,758 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 [2021-12-17 21:05:04,759 INFO L933 BasicCegarLoop]: 399 mSDtfsCounter, 713 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 721 SdHoareTripleChecker+Valid, 976 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 21:05:04,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [721 Valid, 976 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 21:05:04,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2021-12-17 21:05:04,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 1275. [2021-12-17 21:05:04,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1275 states, 1012 states have (on average 1.33201581027668) internal successors, (1348), 1031 states have internal predecessors, (1348), 137 states have call successors, (137), 96 states have call predecessors, (137), 124 states have return successors, (197), 154 states have call predecessors, (197), 133 states have call successors, (197) [2021-12-17 21:05:04,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1275 states to 1275 states and 1682 transitions. [2021-12-17 21:05:04,825 INFO L78 Accepts]: Start accepts. Automaton has 1275 states and 1682 transitions. Word has length 66 [2021-12-17 21:05:04,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:05:04,826 INFO L470 AbstractCegarLoop]: Abstraction has 1275 states and 1682 transitions. [2021-12-17 21:05:04,826 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) [2021-12-17 21:05:04,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1275 states and 1682 transitions. [2021-12-17 21:05:04,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-17 21:05:04,828 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:05:04,829 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] [2021-12-17 21:05:04,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 21:05:04,829 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:05:04,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:05:04,830 INFO L85 PathProgramCache]: Analyzing trace with hash -457796111, now seen corresponding path program 1 times [2021-12-17 21:05:04,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:05:04,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199718863] [2021-12-17 21:05:04,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:05:04,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:05:04,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:04,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:05:04,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:04,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:05:04,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:04,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:05:04,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:04,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:05:04,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:04,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:05:04,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:04,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:05:04,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:04,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:05:04,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:04,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:05:04,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:05:04,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199718863] [2021-12-17 21:05:04,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199718863] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:05:04,901 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:05:04,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 21:05:04,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426508085] [2021-12-17 21:05:04,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:05:04,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 21:05:04,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:05:04,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 21:05:04,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 21:05:04,903 INFO L87 Difference]: Start difference. First operand 1275 states and 1682 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) [2021-12-17 21:05:05,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:05:05,289 INFO L93 Difference]: Finished difference Result 3463 states and 4488 transitions. [2021-12-17 21:05:05,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 21:05:05,290 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 [2021-12-17 21:05:05,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:05:05,301 INFO L225 Difference]: With dead ends: 3463 [2021-12-17 21:05:05,302 INFO L226 Difference]: Without dead ends: 2395 [2021-12-17 21:05:05,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-12-17 21:05:05,306 INFO L933 BasicCegarLoop]: 400 mSDtfsCounter, 775 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 800 SdHoareTripleChecker+Valid, 1000 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:05:05,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [800 Valid, 1000 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 21:05:05,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2395 states. [2021-12-17 21:05:05,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2395 to 2137. [2021-12-17 21:05:05,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2137 states, 1678 states have (on average 1.296185935637664) internal successors, (2175), 1707 states have internal predecessors, (2175), 235 states have call successors, (235), 180 states have call predecessors, (235), 222 states have return successors, (333), 256 states have call predecessors, (333), 231 states have call successors, (333) [2021-12-17 21:05:05,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2137 states to 2137 states and 2743 transitions. [2021-12-17 21:05:05,409 INFO L78 Accepts]: Start accepts. Automaton has 2137 states and 2743 transitions. Word has length 66 [2021-12-17 21:05:05,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:05:05,410 INFO L470 AbstractCegarLoop]: Abstraction has 2137 states and 2743 transitions. [2021-12-17 21:05:05,410 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) [2021-12-17 21:05:05,411 INFO L276 IsEmpty]: Start isEmpty. Operand 2137 states and 2743 transitions. [2021-12-17 21:05:05,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-17 21:05:05,414 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:05:05,414 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] [2021-12-17 21:05:05,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 21:05:05,415 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:05:05,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:05:05,415 INFO L85 PathProgramCache]: Analyzing trace with hash 721355205, now seen corresponding path program 1 times [2021-12-17 21:05:05,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:05:05,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946627772] [2021-12-17 21:05:05,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:05:05,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:05:05,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:05,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:05:05,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:05,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:05:05,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:05,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:05:05,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:05,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:05:05,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:05,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:05:05,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:05,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:05:05,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:05,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:05:05,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:05,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:05:05,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:05:05,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946627772] [2021-12-17 21:05:05,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946627772] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:05:05,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:05:05,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 21:05:05,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277034786] [2021-12-17 21:05:05,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:05:05,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 21:05:05,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:05:05,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 21:05:05,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 21:05:05,500 INFO L87 Difference]: Start difference. First operand 2137 states and 2743 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) [2021-12-17 21:05:05,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:05:05,859 INFO L93 Difference]: Finished difference Result 5047 states and 6393 transitions. [2021-12-17 21:05:05,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 21:05:05,860 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 [2021-12-17 21:05:05,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:05:05,893 INFO L225 Difference]: With dead ends: 5047 [2021-12-17 21:05:05,893 INFO L226 Difference]: Without dead ends: 3117 [2021-12-17 21:05:05,897 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 [2021-12-17 21:05:05,899 INFO L933 BasicCegarLoop]: 414 mSDtfsCounter, 954 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 979 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:05:05,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [979 Valid, 852 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 21:05:05,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3117 states. [2021-12-17 21:05:06,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3117 to 2869. [2021-12-17 21:05:06,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2869 states, 2246 states have (on average 1.2818343722172751) internal successors, (2879), 2283 states have internal predecessors, (2879), 315 states have call successors, (315), 250 states have call predecessors, (315), 306 states have return successors, (442), 342 states have call predecessors, (442), 311 states have call successors, (442) [2021-12-17 21:05:06,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2869 states to 2869 states and 3636 transitions. [2021-12-17 21:05:06,030 INFO L78 Accepts]: Start accepts. Automaton has 2869 states and 3636 transitions. Word has length 72 [2021-12-17 21:05:06,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:05:06,030 INFO L470 AbstractCegarLoop]: Abstraction has 2869 states and 3636 transitions. [2021-12-17 21:05:06,031 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) [2021-12-17 21:05:06,031 INFO L276 IsEmpty]: Start isEmpty. Operand 2869 states and 3636 transitions. [2021-12-17 21:05:06,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-17 21:05:06,033 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:05:06,033 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] [2021-12-17 21:05:06,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 21:05:06,033 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:05:06,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:05:06,034 INFO L85 PathProgramCache]: Analyzing trace with hash 370804326, now seen corresponding path program 1 times [2021-12-17 21:05:06,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:05:06,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383028021] [2021-12-17 21:05:06,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:05:06,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:05:06,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:06,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:05:06,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:06,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:05:06,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:06,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:05:06,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:06,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:05:06,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:06,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:05:06,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:06,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:05:06,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:06,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:05:06,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:06,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:05:06,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:05:06,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383028021] [2021-12-17 21:05:06,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383028021] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:05:06,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:05:06,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:05:06,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717631693] [2021-12-17 21:05:06,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:05:06,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:05:06,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:05:06,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:05:06,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:05:06,143 INFO L87 Difference]: Start difference. First operand 2869 states and 3636 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) [2021-12-17 21:05:06,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:05:06,633 INFO L93 Difference]: Finished difference Result 3643 states and 4567 transitions. [2021-12-17 21:05:06,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 21:05:06,634 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 [2021-12-17 21:05:06,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:05:06,667 INFO L225 Difference]: With dead ends: 3643 [2021-12-17 21:05:06,667 INFO L226 Difference]: Without dead ends: 3640 [2021-12-17 21:05:06,668 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 [2021-12-17 21:05:06,669 INFO L933 BasicCegarLoop]: 409 mSDtfsCounter, 1363 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1373 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 305 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 21:05:06,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1373 Valid, 822 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [305 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 21:05:06,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3640 states. [2021-12-17 21:05:06,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3640 to 3363. [2021-12-17 21:05:06,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3363 states, 2631 states have (on average 1.273660205245154) internal successors, (3351), 2673 states have internal predecessors, (3351), 365 states have call successors, (365), 294 states have call predecessors, (365), 365 states have return successors, (521), 402 states have call predecessors, (521), 362 states have call successors, (521) [2021-12-17 21:05:06,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3363 states to 3363 states and 4237 transitions. [2021-12-17 21:05:06,825 INFO L78 Accepts]: Start accepts. Automaton has 3363 states and 4237 transitions. Word has length 73 [2021-12-17 21:05:06,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:05:06,825 INFO L470 AbstractCegarLoop]: Abstraction has 3363 states and 4237 transitions. [2021-12-17 21:05:06,825 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) [2021-12-17 21:05:06,826 INFO L276 IsEmpty]: Start isEmpty. Operand 3363 states and 4237 transitions. [2021-12-17 21:05:06,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-17 21:05:06,827 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:05:06,828 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] [2021-12-17 21:05:06,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 21:05:06,828 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:05:06,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:05:06,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1390842321, now seen corresponding path program 1 times [2021-12-17 21:05:06,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:05:06,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557972510] [2021-12-17 21:05:06,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:05:06,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:05:06,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:06,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:05:06,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:06,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:05:06,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:06,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:05:06,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:06,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:05:06,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:06,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:05:06,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:06,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:05:06,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:06,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:05:06,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:06,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:05:06,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:05:06,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557972510] [2021-12-17 21:05:06,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557972510] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 21:05:06,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963062171] [2021-12-17 21:05:06,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:05:06,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:05:06,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:05:06,987 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 21:05:07,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 21:05:07,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:07,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-17 21:05:07,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:05:07,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:05:07,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 21:05:07,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:05:07,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963062171] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 21:05:07,797 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 21:05:07,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 10 [2021-12-17 21:05:07,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743571227] [2021-12-17 21:05:07,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 21:05:07,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 21:05:07,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:05:07,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 21:05:07,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-17 21:05:07,800 INFO L87 Difference]: Start difference. First operand 3363 states and 4237 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) [2021-12-17 21:05:09,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:05:09,272 INFO L93 Difference]: Finished difference Result 7804 states and 9723 transitions. [2021-12-17 21:05:09,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-17 21:05:09,273 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 [2021-12-17 21:05:09,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:05:09,313 INFO L225 Difference]: With dead ends: 7804 [2021-12-17 21:05:09,313 INFO L226 Difference]: Without dead ends: 7801 [2021-12-17 21:05:09,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 174 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2021-12-17 21:05:09,319 INFO L933 BasicCegarLoop]: 567 mSDtfsCounter, 1673 mSDsluCounter, 1268 mSDsCounter, 0 mSdLazyCounter, 1190 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1737 SdHoareTripleChecker+Valid, 1835 SdHoareTripleChecker+Invalid, 1493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 1190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:05:09,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1737 Valid, 1835 Invalid, 1493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 1190 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 21:05:09,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7801 states. [2021-12-17 21:05:09,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7801 to 5153. [2021-12-17 21:05:09,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5153 states, 4035 states have (on average 1.2706319702602231) internal successors, (5127), 4099 states have internal predecessors, (5127), 549 states have call successors, (549), 452 states have call predecessors, (549), 567 states have return successors, (799), 608 states have call predecessors, (799), 546 states have call successors, (799) [2021-12-17 21:05:09,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5153 states to 5153 states and 6475 transitions. [2021-12-17 21:05:09,650 INFO L78 Accepts]: Start accepts. Automaton has 5153 states and 6475 transitions. Word has length 74 [2021-12-17 21:05:09,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:05:09,651 INFO L470 AbstractCegarLoop]: Abstraction has 5153 states and 6475 transitions. [2021-12-17 21:05:09,651 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) [2021-12-17 21:05:09,651 INFO L276 IsEmpty]: Start isEmpty. Operand 5153 states and 6475 transitions. [2021-12-17 21:05:09,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-17 21:05:09,653 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:05:09,654 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] [2021-12-17 21:05:09,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 21:05:09,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-17 21:05:09,868 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:05:09,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:05:09,868 INFO L85 PathProgramCache]: Analyzing trace with hash -2100794586, now seen corresponding path program 2 times [2021-12-17 21:05:09,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:05:09,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635814198] [2021-12-17 21:05:09,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:05:09,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:05:09,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:09,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:05:09,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:09,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:05:09,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:09,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:05:09,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:09,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:05:09,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:09,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:05:09,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:09,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:05:09,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:09,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:05:09,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:09,940 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:05:09,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:05:09,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635814198] [2021-12-17 21:05:09,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635814198] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:05:09,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:05:09,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 21:05:09,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453893606] [2021-12-17 21:05:09,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:05:09,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 21:05:09,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:05:09,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 21:05:09,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 21:05:09,943 INFO L87 Difference]: Start difference. First operand 5153 states and 6475 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) [2021-12-17 21:05:10,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:05:10,434 INFO L93 Difference]: Finished difference Result 7835 states and 9848 transitions. [2021-12-17 21:05:10,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 21:05:10,435 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 [2021-12-17 21:05:10,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:05:10,451 INFO L225 Difference]: With dead ends: 7835 [2021-12-17 21:05:10,452 INFO L226 Difference]: Without dead ends: 3760 [2021-12-17 21:05:10,461 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 [2021-12-17 21:05:10,461 INFO L933 BasicCegarLoop]: 459 mSDtfsCounter, 680 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 708 SdHoareTripleChecker+Valid, 1156 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:05:10,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [708 Valid, 1156 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 21:05:10,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3760 states. [2021-12-17 21:05:10,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3760 to 3525. [2021-12-17 21:05:10,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3525 states, 2763 states have (on average 1.2547955121245022) internal successors, (3467), 2805 states have internal predecessors, (3467), 381 states have call successors, (381), 308 states have call predecessors, (381), 379 states have return successors, (525), 418 states have call predecessors, (525), 378 states have call successors, (525) [2021-12-17 21:05:10,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3525 states to 3525 states and 4373 transitions. [2021-12-17 21:05:10,651 INFO L78 Accepts]: Start accepts. Automaton has 3525 states and 4373 transitions. Word has length 77 [2021-12-17 21:05:10,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:05:10,652 INFO L470 AbstractCegarLoop]: Abstraction has 3525 states and 4373 transitions. [2021-12-17 21:05:10,653 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) [2021-12-17 21:05:10,653 INFO L276 IsEmpty]: Start isEmpty. Operand 3525 states and 4373 transitions. [2021-12-17 21:05:10,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-17 21:05:10,656 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:05:10,657 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] [2021-12-17 21:05:10,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 21:05:10,657 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:05:10,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:05:10,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1884573217, now seen corresponding path program 1 times [2021-12-17 21:05:10,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:05:10,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54998889] [2021-12-17 21:05:10,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:05:10,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:05:10,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:10,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:05:10,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:10,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:05:10,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:10,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:05:10,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:10,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:05:10,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:10,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:05:10,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:10,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:05:10,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:10,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:05:10,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:10,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-17 21:05:10,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:10,770 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 21:05:10,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:05:10,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54998889] [2021-12-17 21:05:10,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54998889] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:05:10,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:05:10,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 21:05:10,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058829700] [2021-12-17 21:05:10,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:05:10,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 21:05:10,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:05:10,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 21:05:10,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:05:10,773 INFO L87 Difference]: Start difference. First operand 3525 states and 4373 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) [2021-12-17 21:05:11,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:05:11,906 INFO L93 Difference]: Finished difference Result 10397 states and 12790 transitions. [2021-12-17 21:05:11,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-17 21:05:11,907 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 [2021-12-17 21:05:11,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:05:11,940 INFO L225 Difference]: With dead ends: 10397 [2021-12-17 21:05:11,941 INFO L226 Difference]: Without dead ends: 5760 [2021-12-17 21:05:11,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-12-17 21:05:11,954 INFO L933 BasicCegarLoop]: 459 mSDtfsCounter, 1165 mSDsluCounter, 843 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 326 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1183 SdHoareTripleChecker+Valid, 1302 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 326 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 21:05:11,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1183 Valid, 1302 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [326 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 21:05:11,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5760 states. [2021-12-17 21:05:12,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5760 to 5440. [2021-12-17 21:05:12,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5440 states, 4221 states have (on average 1.2295664534470505) internal successors, (5190), 4306 states have internal predecessors, (5190), 585 states have call successors, (585), 482 states have call predecessors, (585), 632 states have return successors, (907), 658 states have call predecessors, (907), 582 states have call successors, (907) [2021-12-17 21:05:12,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5440 states to 5440 states and 6682 transitions. [2021-12-17 21:05:12,215 INFO L78 Accepts]: Start accepts. Automaton has 5440 states and 6682 transitions. Word has length 84 [2021-12-17 21:05:12,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:05:12,215 INFO L470 AbstractCegarLoop]: Abstraction has 5440 states and 6682 transitions. [2021-12-17 21:05:12,215 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) [2021-12-17 21:05:12,215 INFO L276 IsEmpty]: Start isEmpty. Operand 5440 states and 6682 transitions. [2021-12-17 21:05:12,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-17 21:05:12,220 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:05:12,220 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] [2021-12-17 21:05:12,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 21:05:12,220 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:05:12,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:05:12,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1300737020, now seen corresponding path program 1 times [2021-12-17 21:05:12,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:05:12,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050021683] [2021-12-17 21:05:12,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:05:12,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:05:12,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:12,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:05:12,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:12,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:05:12,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:12,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:05:12,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:12,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:05:12,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:12,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:05:12,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:12,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:05:12,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:12,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:05:12,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:12,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-17 21:05:12,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:12,302 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-17 21:05:12,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:05:12,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050021683] [2021-12-17 21:05:12,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050021683] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:05:12,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:05:12,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 21:05:12,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130602088] [2021-12-17 21:05:12,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:05:12,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 21:05:12,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:05:12,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 21:05:12,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-17 21:05:12,306 INFO L87 Difference]: Start difference. First operand 5440 states and 6682 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) [2021-12-17 21:05:13,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:05:13,512 INFO L93 Difference]: Finished difference Result 9443 states and 11522 transitions. [2021-12-17 21:05:13,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-17 21:05:13,513 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 [2021-12-17 21:05:13,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:05:13,541 INFO L225 Difference]: With dead ends: 9443 [2021-12-17 21:05:13,541 INFO L226 Difference]: Without dead ends: 4850 [2021-12-17 21:05:13,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2021-12-17 21:05:13,555 INFO L933 BasicCegarLoop]: 444 mSDtfsCounter, 1372 mSDsluCounter, 1309 mSDsCounter, 0 mSdLazyCounter, 1183 mSolverCounterSat, 320 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1414 SdHoareTripleChecker+Valid, 1753 SdHoareTripleChecker+Invalid, 1503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 320 IncrementalHoareTripleChecker+Valid, 1183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 21:05:13,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1414 Valid, 1753 Invalid, 1503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [320 Valid, 1183 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 21:05:13,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4850 states. [2021-12-17 21:05:13,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4850 to 4516. [2021-12-17 21:05:13,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4516 states, 3510 states have (on average 1.221937321937322) internal successors, (4289), 3577 states have internal predecessors, (4289), 486 states have call successors, (486), 397 states have call predecessors, (486), 518 states have return successors, (685), 548 states have call predecessors, (685), 483 states have call successors, (685) [2021-12-17 21:05:13,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4516 states to 4516 states and 5460 transitions. [2021-12-17 21:05:13,798 INFO L78 Accepts]: Start accepts. Automaton has 4516 states and 5460 transitions. Word has length 93 [2021-12-17 21:05:13,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:05:13,798 INFO L470 AbstractCegarLoop]: Abstraction has 4516 states and 5460 transitions. [2021-12-17 21:05:13,798 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) [2021-12-17 21:05:13,799 INFO L276 IsEmpty]: Start isEmpty. Operand 4516 states and 5460 transitions. [2021-12-17 21:05:13,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-17 21:05:13,802 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:05:13,802 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:05:13,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 21:05:13,803 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:05:13,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:05:13,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1368673816, now seen corresponding path program 1 times [2021-12-17 21:05:13,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:05:13,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879527606] [2021-12-17 21:05:13,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:05:13,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:05:13,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:13,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:05:13,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:13,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 21:05:13,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:13,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 21:05:13,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:13,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-17 21:05:13,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:13,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 21:05:13,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:13,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:05:13,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:05:13,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879527606] [2021-12-17 21:05:13,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879527606] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:05:13,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:05:13,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 21:05:13,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435037714] [2021-12-17 21:05:13,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:05:13,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 21:05:13,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:05:13,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 21:05:13,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 21:05:13,883 INFO L87 Difference]: Start difference. First operand 4516 states and 5460 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 4 states have internal predecessors, (80), 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) [2021-12-17 21:05:15,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:05:15,150 INFO L93 Difference]: Finished difference Result 4970 states and 6171 transitions. [2021-12-17 21:05:15,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 21:05:15,150 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 4 states have internal predecessors, (80), 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 91 [2021-12-17 21:05:15,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:05:15,167 INFO L225 Difference]: With dead ends: 4970 [2021-12-17 21:05:15,167 INFO L226 Difference]: Without dead ends: 4798 [2021-12-17 21:05:15,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:05:15,174 INFO L933 BasicCegarLoop]: 438 mSDtfsCounter, 866 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 887 SdHoareTripleChecker+Valid, 1115 SdHoareTripleChecker+Invalid, 1048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 21:05:15,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [887 Valid, 1115 Invalid, 1048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 922 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 21:05:15,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4798 states. [2021-12-17 21:05:15,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4798 to 4689. [2021-12-17 21:05:15,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4689 states, 3663 states have (on average 1.2358722358722358) internal successors, (4527), 3731 states have internal predecessors, (4527), 499 states have call successors, (499), 403 states have call predecessors, (499), 525 states have return successors, (701), 561 states have call predecessors, (701), 496 states have call successors, (701) [2021-12-17 21:05:15,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4689 states to 4689 states and 5727 transitions. [2021-12-17 21:05:15,466 INFO L78 Accepts]: Start accepts. Automaton has 4689 states and 5727 transitions. Word has length 91 [2021-12-17 21:05:15,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:05:15,467 INFO L470 AbstractCegarLoop]: Abstraction has 4689 states and 5727 transitions. [2021-12-17 21:05:15,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 4 states have internal predecessors, (80), 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) [2021-12-17 21:05:15,467 INFO L276 IsEmpty]: Start isEmpty. Operand 4689 states and 5727 transitions. [2021-12-17 21:05:15,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-17 21:05:15,471 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:05:15,471 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:05:15,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 21:05:15,472 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:05:15,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:05:15,473 INFO L85 PathProgramCache]: Analyzing trace with hash 871588836, now seen corresponding path program 1 times [2021-12-17 21:05:15,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:05:15,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758495135] [2021-12-17 21:05:15,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:05:15,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:05:15,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:15,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:05:15,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:15,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 21:05:15,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:15,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 21:05:15,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:15,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-17 21:05:15,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:15,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 21:05:15,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:15,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:05:15,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:05:15,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758495135] [2021-12-17 21:05:15,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758495135] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:05:15,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:05:15,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:05:15,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715065916] [2021-12-17 21:05:15,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:05:15,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:05:15,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:05:15,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:05:15,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:05:15,572 INFO L87 Difference]: Start difference. First operand 4689 states and 5727 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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) [2021-12-17 21:05:17,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:05:17,040 INFO L93 Difference]: Finished difference Result 5373 states and 6793 transitions. [2021-12-17 21:05:17,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 21:05:17,041 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 91 [2021-12-17 21:05:17,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:05:17,054 INFO L225 Difference]: With dead ends: 5373 [2021-12-17 21:05:17,054 INFO L226 Difference]: Without dead ends: 5028 [2021-12-17 21:05:17,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 21:05:17,058 INFO L933 BasicCegarLoop]: 575 mSDtfsCounter, 861 mSDsluCounter, 1189 mSDsCounter, 0 mSdLazyCounter, 1471 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 882 SdHoareTripleChecker+Valid, 1764 SdHoareTripleChecker+Invalid, 1568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:05:17,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [882 Valid, 1764 Invalid, 1568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1471 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 21:05:17,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5028 states. [2021-12-17 21:05:17,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5028 to 4851. [2021-12-17 21:05:17,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4851 states, 3805 states have (on average 1.2465177398160316) internal successors, (4743), 3874 states have internal predecessors, (4743), 512 states have call successors, (512), 409 states have call predecessors, (512), 532 states have return successors, (716), 575 states have call predecessors, (716), 509 states have call successors, (716) [2021-12-17 21:05:17,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4851 states to 4851 states and 5971 transitions. [2021-12-17 21:05:17,321 INFO L78 Accepts]: Start accepts. Automaton has 4851 states and 5971 transitions. Word has length 91 [2021-12-17 21:05:17,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:05:17,322 INFO L470 AbstractCegarLoop]: Abstraction has 4851 states and 5971 transitions. [2021-12-17 21:05:17,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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) [2021-12-17 21:05:17,322 INFO L276 IsEmpty]: Start isEmpty. Operand 4851 states and 5971 transitions. [2021-12-17 21:05:17,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-17 21:05:17,326 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:05:17,326 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:05:17,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 21:05:17,327 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:05:17,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:05:17,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1689274010, now seen corresponding path program 1 times [2021-12-17 21:05:17,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:05:17,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393310478] [2021-12-17 21:05:17,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:05:17,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:05:17,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:17,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:05:17,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:17,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 21:05:17,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:17,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 21:05:17,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:17,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-17 21:05:17,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:17,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 21:05:17,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:17,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:05:17,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:05:17,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393310478] [2021-12-17 21:05:17,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393310478] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:05:17,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:05:17,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:05:17,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294858656] [2021-12-17 21:05:17,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:05:17,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:05:17,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:05:17,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:05:17,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:05:17,410 INFO L87 Difference]: Start difference. First operand 4851 states and 5971 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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) [2021-12-17 21:05:18,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:05:18,884 INFO L93 Difference]: Finished difference Result 5966 states and 7705 transitions. [2021-12-17 21:05:18,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 21:05:18,887 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 91 [2021-12-17 21:05:18,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:05:18,904 INFO L225 Difference]: With dead ends: 5966 [2021-12-17 21:05:18,904 INFO L226 Difference]: Without dead ends: 5459 [2021-12-17 21:05:18,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 21:05:18,910 INFO L933 BasicCegarLoop]: 567 mSDtfsCounter, 858 mSDsluCounter, 1185 mSDsCounter, 0 mSdLazyCounter, 1477 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 879 SdHoareTripleChecker+Valid, 1752 SdHoareTripleChecker+Invalid, 1577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:05:18,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [879 Valid, 1752 Invalid, 1577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1477 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 21:05:18,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5459 states. [2021-12-17 21:05:19,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5459 to 5176. [2021-12-17 21:05:19,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5176 states, 4090 states have (on average 1.2655256723716382) internal successors, (5176), 4161 states have internal predecessors, (5176), 538 states have call successors, (538), 421 states have call predecessors, (538), 546 states have return successors, (750), 603 states have call predecessors, (750), 535 states have call successors, (750) [2021-12-17 21:05:19,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5176 states to 5176 states and 6464 transitions. [2021-12-17 21:05:19,262 INFO L78 Accepts]: Start accepts. Automaton has 5176 states and 6464 transitions. Word has length 91 [2021-12-17 21:05:19,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:05:19,262 INFO L470 AbstractCegarLoop]: Abstraction has 5176 states and 6464 transitions. [2021-12-17 21:05:19,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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) [2021-12-17 21:05:19,262 INFO L276 IsEmpty]: Start isEmpty. Operand 5176 states and 6464 transitions. [2021-12-17 21:05:19,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-17 21:05:19,267 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:05:19,267 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:05:19,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 21:05:19,268 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:05:19,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:05:19,268 INFO L85 PathProgramCache]: Analyzing trace with hash -802051164, now seen corresponding path program 1 times [2021-12-17 21:05:19,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:05:19,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441808376] [2021-12-17 21:05:19,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:05:19,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:05:19,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:19,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:05:19,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:19,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 21:05:19,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:19,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 21:05:19,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:19,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-17 21:05:19,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:19,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 21:05:19,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:19,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:05:19,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:05:19,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441808376] [2021-12-17 21:05:19,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441808376] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:05:19,371 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:05:19,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:05:19,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392218601] [2021-12-17 21:05:19,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:05:19,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:05:19,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:05:19,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:05:19,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:05:19,373 INFO L87 Difference]: Start difference. First operand 5176 states and 6464 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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) [2021-12-17 21:05:20,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:05:20,838 INFO L93 Difference]: Finished difference Result 7111 states and 9462 transitions. [2021-12-17 21:05:20,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 21:05:20,839 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 91 [2021-12-17 21:05:20,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:05:20,856 INFO L225 Difference]: With dead ends: 7111 [2021-12-17 21:05:20,857 INFO L226 Difference]: Without dead ends: 6279 [2021-12-17 21:05:20,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 21:05:20,862 INFO L933 BasicCegarLoop]: 563 mSDtfsCounter, 854 mSDsluCounter, 1185 mSDsCounter, 0 mSdLazyCounter, 1472 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 875 SdHoareTripleChecker+Valid, 1748 SdHoareTripleChecker+Invalid, 1572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:05:20,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [875 Valid, 1748 Invalid, 1572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1472 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 21:05:20,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6279 states. [2021-12-17 21:05:21,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6279 to 5827. [2021-12-17 21:05:21,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5827 states, 4661 states have (on average 1.296288350139455) internal successors, (6042), 4736 states have internal predecessors, (6042), 590 states have call successors, (590), 445 states have call predecessors, (590), 574 states have return successors, (824), 659 states have call predecessors, (824), 587 states have call successors, (824) [2021-12-17 21:05:21,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5827 states to 5827 states and 7456 transitions. [2021-12-17 21:05:21,193 INFO L78 Accepts]: Start accepts. Automaton has 5827 states and 7456 transitions. Word has length 91 [2021-12-17 21:05:21,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:05:21,194 INFO L470 AbstractCegarLoop]: Abstraction has 5827 states and 7456 transitions. [2021-12-17 21:05:21,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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) [2021-12-17 21:05:21,194 INFO L276 IsEmpty]: Start isEmpty. Operand 5827 states and 7456 transitions. [2021-12-17 21:05:21,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-17 21:05:21,198 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:05:21,199 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:05:21,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-17 21:05:21,199 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:05:21,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:05:21,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1581873574, now seen corresponding path program 1 times [2021-12-17 21:05:21,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:05:21,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864331298] [2021-12-17 21:05:21,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:05:21,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:05:21,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:21,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:05:21,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:21,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 21:05:21,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:21,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 21:05:21,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:21,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-17 21:05:21,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:21,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 21:05:21,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:21,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:05:21,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:05:21,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864331298] [2021-12-17 21:05:21,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864331298] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:05:21,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:05:21,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:05:21,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799882830] [2021-12-17 21:05:21,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:05:21,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:05:21,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:05:21,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:05:21,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:05:21,280 INFO L87 Difference]: Start difference. First operand 5827 states and 7456 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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) [2021-12-17 21:05:22,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:05:22,861 INFO L93 Difference]: Finished difference Result 9400 states and 12992 transitions. [2021-12-17 21:05:22,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 21:05:22,862 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 91 [2021-12-17 21:05:22,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:05:22,890 INFO L225 Difference]: With dead ends: 9400 [2021-12-17 21:05:22,890 INFO L226 Difference]: Without dead ends: 7917 [2021-12-17 21:05:22,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 21:05:22,900 INFO L933 BasicCegarLoop]: 557 mSDtfsCounter, 853 mSDsluCounter, 1185 mSDsCounter, 0 mSdLazyCounter, 1464 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 874 SdHoareTripleChecker+Valid, 1742 SdHoareTripleChecker+Invalid, 1567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-17 21:05:22,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [874 Valid, 1742 Invalid, 1567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1464 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-17 21:05:22,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7917 states. [2021-12-17 21:05:23,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7917 to 7134. [2021-12-17 21:05:23,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7134 states, 5808 states have (on average 1.3395316804407713) internal successors, (7780), 5891 states have internal predecessors, (7780), 694 states have call successors, (694), 493 states have call predecessors, (694), 630 states have return successors, (990), 771 states have call predecessors, (990), 691 states have call successors, (990) [2021-12-17 21:05:23,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7134 states to 7134 states and 9464 transitions. [2021-12-17 21:05:23,310 INFO L78 Accepts]: Start accepts. Automaton has 7134 states and 9464 transitions. Word has length 91 [2021-12-17 21:05:23,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:05:23,310 INFO L470 AbstractCegarLoop]: Abstraction has 7134 states and 9464 transitions. [2021-12-17 21:05:23,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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) [2021-12-17 21:05:23,311 INFO L276 IsEmpty]: Start isEmpty. Operand 7134 states and 9464 transitions. [2021-12-17 21:05:23,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-17 21:05:23,316 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:05:23,316 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:05:23,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-17 21:05:23,317 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:05:23,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:05:23,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1658774372, now seen corresponding path program 1 times [2021-12-17 21:05:23,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:05:23,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980874604] [2021-12-17 21:05:23,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:05:23,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:05:23,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:23,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:05:23,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:23,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 21:05:23,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:23,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 21:05:23,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:23,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-17 21:05:23,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:23,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 21:05:23,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:23,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:05:23,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:05:23,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980874604] [2021-12-17 21:05:23,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980874604] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:05:23,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:05:23,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:05:23,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753809271] [2021-12-17 21:05:23,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:05:23,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:05:23,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:05:23,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:05:23,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:05:23,399 INFO L87 Difference]: Start difference. First operand 7134 states and 9464 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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) [2021-12-17 21:05:24,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:05:24,985 INFO L93 Difference]: Finished difference Result 14810 states and 21348 transitions. [2021-12-17 21:05:24,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 21:05:24,985 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 91 [2021-12-17 21:05:24,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:05:25,028 INFO L225 Difference]: With dead ends: 14810 [2021-12-17 21:05:25,028 INFO L226 Difference]: Without dead ends: 12020 [2021-12-17 21:05:25,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-17 21:05:25,045 INFO L933 BasicCegarLoop]: 546 mSDtfsCounter, 982 mSDsluCounter, 1174 mSDsCounter, 0 mSdLazyCounter, 1436 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1008 SdHoareTripleChecker+Valid, 1720 SdHoareTripleChecker+Invalid, 1545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 21:05:25,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1008 Valid, 1720 Invalid, 1545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1436 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 21:05:25,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12020 states. [2021-12-17 21:05:25,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12020 to 9570. [2021-12-17 21:05:25,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9570 states, 7940 states have (on average 1.3838790931989924) internal successors, (10988), 8039 states have internal predecessors, (10988), 886 states have call successors, (886), 589 states have call predecessors, (886), 742 states have return successors, (1360), 979 states have call predecessors, (1360), 883 states have call successors, (1360) [2021-12-17 21:05:25,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9570 states to 9570 states and 13234 transitions. [2021-12-17 21:05:25,634 INFO L78 Accepts]: Start accepts. Automaton has 9570 states and 13234 transitions. Word has length 91 [2021-12-17 21:05:25,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:05:25,634 INFO L470 AbstractCegarLoop]: Abstraction has 9570 states and 13234 transitions. [2021-12-17 21:05:25,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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) [2021-12-17 21:05:25,635 INFO L276 IsEmpty]: Start isEmpty. Operand 9570 states and 13234 transitions. [2021-12-17 21:05:25,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-17 21:05:25,642 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:05:25,642 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:05:25,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-17 21:05:25,643 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:05:25,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:05:25,643 INFO L85 PathProgramCache]: Analyzing trace with hash -727735134, now seen corresponding path program 1 times [2021-12-17 21:05:25,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:05:25,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567555571] [2021-12-17 21:05:25,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:05:25,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:05:25,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:25,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:05:25,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:25,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 21:05:25,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:25,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 21:05:25,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:25,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-17 21:05:25,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:25,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 21:05:25,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:25,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:05:25,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:05:25,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567555571] [2021-12-17 21:05:25,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567555571] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:05:25,732 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:05:25,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:05:25,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154601950] [2021-12-17 21:05:25,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:05:25,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:05:25,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:05:25,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:05:25,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:05:25,735 INFO L87 Difference]: Start difference. First operand 9570 states and 13234 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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) [2021-12-17 21:05:27,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:05:27,712 INFO L93 Difference]: Finished difference Result 23776 states and 35320 transitions. [2021-12-17 21:05:27,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 21:05:27,712 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 91 [2021-12-17 21:05:27,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:05:27,787 INFO L225 Difference]: With dead ends: 23776 [2021-12-17 21:05:27,788 INFO L226 Difference]: Without dead ends: 18550 [2021-12-17 21:05:27,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-17 21:05:27,813 INFO L933 BasicCegarLoop]: 478 mSDtfsCounter, 917 mSDsluCounter, 872 mSDsCounter, 0 mSdLazyCounter, 1448 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 937 SdHoareTripleChecker+Valid, 1350 SdHoareTripleChecker+Invalid, 1576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:05:27,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [937 Valid, 1350 Invalid, 1576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1448 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 21:05:27,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18550 states. [2021-12-17 21:05:28,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18550 to 14583. [2021-12-17 21:05:28,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14583 states, 12361 states have (on average 1.4320847827845644) internal successors, (17702), 12492 states have internal predecessors, (17702), 1254 states have call successors, (1254), 781 states have call predecessors, (1254), 966 states have return successors, (2246), 1379 states have call predecessors, (2246), 1251 states have call successors, (2246) [2021-12-17 21:05:28,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14583 states to 14583 states and 21202 transitions. [2021-12-17 21:05:28,607 INFO L78 Accepts]: Start accepts. Automaton has 14583 states and 21202 transitions. Word has length 91 [2021-12-17 21:05:28,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:05:28,607 INFO L470 AbstractCegarLoop]: Abstraction has 14583 states and 21202 transitions. [2021-12-17 21:05:28,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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) [2021-12-17 21:05:28,608 INFO L276 IsEmpty]: Start isEmpty. Operand 14583 states and 21202 transitions. [2021-12-17 21:05:28,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-17 21:05:28,619 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:05:28,620 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:05:28,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-17 21:05:28,620 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:05:28,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:05:28,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1220361308, now seen corresponding path program 1 times [2021-12-17 21:05:28,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:05:28,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618881994] [2021-12-17 21:05:28,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:05:28,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:05:28,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:28,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:05:28,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:28,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 21:05:28,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:28,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 21:05:28,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:28,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-17 21:05:28,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:28,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 21:05:28,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:28,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:05:28,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:05:28,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618881994] [2021-12-17 21:05:28,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618881994] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:05:28,692 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:05:28,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:05:28,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896787003] [2021-12-17 21:05:28,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:05:28,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:05:28,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:05:28,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:05:28,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:05:28,694 INFO L87 Difference]: Start difference. First operand 14583 states and 21202 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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) [2021-12-17 21:05:31,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:05:31,376 INFO L93 Difference]: Finished difference Result 41563 states and 63798 transitions. [2021-12-17 21:05:31,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 21:05:31,379 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 91 [2021-12-17 21:05:31,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:05:31,511 INFO L225 Difference]: With dead ends: 41563 [2021-12-17 21:05:31,511 INFO L226 Difference]: Without dead ends: 31324 [2021-12-17 21:05:31,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-17 21:05:31,555 INFO L933 BasicCegarLoop]: 537 mSDtfsCounter, 903 mSDsluCounter, 1177 mSDsCounter, 0 mSdLazyCounter, 1421 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 929 SdHoareTripleChecker+Valid, 1714 SdHoareTripleChecker+Invalid, 1530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-17 21:05:31,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [929 Valid, 1714 Invalid, 1530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1421 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-17 21:05:31,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31324 states. [2021-12-17 21:05:32,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31324 to 24576. [2021-12-17 21:05:32,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24576 states, 21202 states have (on average 1.4696726723893971) internal successors, (31160), 21397 states have internal predecessors, (31160), 1958 states have call successors, (1958), 1165 states have call predecessors, (1958), 1414 states have return successors, (4472), 2147 states have call predecessors, (4472), 1955 states have call successors, (4472) [2021-12-17 21:05:32,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24576 states to 24576 states and 37590 transitions. [2021-12-17 21:05:32,997 INFO L78 Accepts]: Start accepts. Automaton has 24576 states and 37590 transitions. Word has length 91 [2021-12-17 21:05:32,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:05:32,997 INFO L470 AbstractCegarLoop]: Abstraction has 24576 states and 37590 transitions. [2021-12-17 21:05:33,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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) [2021-12-17 21:05:33,002 INFO L276 IsEmpty]: Start isEmpty. Operand 24576 states and 37590 transitions. [2021-12-17 21:05:33,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-17 21:05:33,024 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:05:33,024 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:05:33,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-17 21:05:33,024 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:05:33,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:05:33,025 INFO L85 PathProgramCache]: Analyzing trace with hash -266421150, now seen corresponding path program 1 times [2021-12-17 21:05:33,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:05:33,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844168737] [2021-12-17 21:05:33,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:05:33,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:05:33,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:33,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:05:33,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:33,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 21:05:33,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:33,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 21:05:33,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:33,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-17 21:05:33,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:33,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 21:05:33,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:33,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:05:33,102 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:05:33,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844168737] [2021-12-17 21:05:33,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844168737] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:05:33,102 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:05:33,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:05:33,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927684928] [2021-12-17 21:05:33,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:05:33,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:05:33,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:05:33,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:05:33,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:05:33,103 INFO L87 Difference]: Start difference. First operand 24576 states and 37590 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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) [2021-12-17 21:05:36,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:05:36,385 INFO L93 Difference]: Finished difference Result 75954 states and 120812 transitions. [2021-12-17 21:05:36,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 21:05:36,385 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 91 [2021-12-17 21:05:36,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:05:36,568 INFO L225 Difference]: With dead ends: 75954 [2021-12-17 21:05:36,569 INFO L226 Difference]: Without dead ends: 55722 [2021-12-17 21:05:36,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-17 21:05:36,629 INFO L933 BasicCegarLoop]: 533 mSDtfsCounter, 863 mSDsluCounter, 1177 mSDsCounter, 0 mSdLazyCounter, 1410 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 889 SdHoareTripleChecker+Valid, 1710 SdHoareTripleChecker+Invalid, 1517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 21:05:36,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [889 Valid, 1710 Invalid, 1517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1410 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 21:05:36,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55722 states. [2021-12-17 21:05:39,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55722 to 44497. [2021-12-17 21:05:39,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44497 states, 38883 states have (on average 1.495203559396137) internal successors, (58138), 39206 states have internal predecessors, (58138), 3302 states have call successors, (3302), 1933 states have call predecessors, (3302), 2310 states have return successors, (10318), 3619 states have call predecessors, (10318), 3299 states have call successors, (10318) [2021-12-17 21:05:39,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44497 states to 44497 states and 71758 transitions. [2021-12-17 21:05:39,550 INFO L78 Accepts]: Start accepts. Automaton has 44497 states and 71758 transitions. Word has length 91 [2021-12-17 21:05:39,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:05:39,551 INFO L470 AbstractCegarLoop]: Abstraction has 44497 states and 71758 transitions. [2021-12-17 21:05:39,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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) [2021-12-17 21:05:39,551 INFO L276 IsEmpty]: Start isEmpty. Operand 44497 states and 71758 transitions. [2021-12-17 21:05:39,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-17 21:05:39,583 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:05:39,583 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:05:39,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-17 21:05:39,584 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:05:39,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:05:39,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1482574876, now seen corresponding path program 1 times [2021-12-17 21:05:39,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:05:39,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482778195] [2021-12-17 21:05:39,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:05:39,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:05:39,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:39,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:05:39,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:39,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 21:05:39,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:39,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 21:05:39,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:39,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-17 21:05:39,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:39,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 21:05:39,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:39,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:05:39,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:05:39,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482778195] [2021-12-17 21:05:39,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482778195] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:05:39,666 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:05:39,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:05:39,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60504043] [2021-12-17 21:05:39,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:05:39,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:05:39,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:05:39,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:05:39,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:05:39,668 INFO L87 Difference]: Start difference. First operand 44497 states and 71758 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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) [2021-12-17 21:05:44,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:05:44,491 INFO L93 Difference]: Finished difference Result 113981 states and 181827 transitions. [2021-12-17 21:05:44,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 21:05:44,491 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 91 [2021-12-17 21:05:44,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:05:44,726 INFO L225 Difference]: With dead ends: 113981 [2021-12-17 21:05:44,727 INFO L226 Difference]: Without dead ends: 73829 [2021-12-17 21:05:44,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-12-17 21:05:44,826 INFO L933 BasicCegarLoop]: 402 mSDtfsCounter, 558 mSDsluCounter, 1082 mSDsCounter, 0 mSdLazyCounter, 1011 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 1484 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 21:05:44,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [558 Valid, 1484 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1011 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 21:05:44,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73829 states. [2021-12-17 21:05:47,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73829 to 45268. [2021-12-17 21:05:47,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45268 states, 39654 states have (on average 1.4855752257023251) internal successors, (58909), 39977 states have internal predecessors, (58909), 3302 states have call successors, (3302), 1933 states have call predecessors, (3302), 2310 states have return successors, (10318), 3619 states have call predecessors, (10318), 3299 states have call successors, (10318) [2021-12-17 21:05:47,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45268 states to 45268 states and 72529 transitions. [2021-12-17 21:05:47,659 INFO L78 Accepts]: Start accepts. Automaton has 45268 states and 72529 transitions. Word has length 91 [2021-12-17 21:05:47,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:05:47,659 INFO L470 AbstractCegarLoop]: Abstraction has 45268 states and 72529 transitions. [2021-12-17 21:05:47,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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) [2021-12-17 21:05:47,660 INFO L276 IsEmpty]: Start isEmpty. Operand 45268 states and 72529 transitions. [2021-12-17 21:05:47,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-17 21:05:47,690 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:05:47,690 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:05:47,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-17 21:05:47,691 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:05:47,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:05:47,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1048845790, now seen corresponding path program 1 times [2021-12-17 21:05:47,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:05:47,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086798267] [2021-12-17 21:05:47,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:05:47,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:05:47,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:47,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:05:47,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:47,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-17 21:05:47,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:47,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-17 21:05:47,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:47,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-17 21:05:47,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:47,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 21:05:47,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:05:47,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:05:47,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:05:47,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086798267] [2021-12-17 21:05:47,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086798267] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:05:47,798 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:05:47,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:05:47,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285340501] [2021-12-17 21:05:47,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:05:47,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:05:47,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:05:47,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:05:47,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:05:47,799 INFO L87 Difference]: Start difference. First operand 45268 states and 72529 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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) [2021-12-17 21:05:56,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:05:56,197 INFO L93 Difference]: Finished difference Result 185958 states and 304655 transitions. [2021-12-17 21:05:56,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-17 21:05:56,197 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 5 states have internal predecessors, (80), 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 91 [2021-12-17 21:05:56,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:05:56,816 INFO L225 Difference]: With dead ends: 185958 [2021-12-17 21:05:56,816 INFO L226 Difference]: Without dead ends: 145035 [2021-12-17 21:05:57,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-12-17 21:05:57,216 INFO L933 BasicCegarLoop]: 680 mSDtfsCounter, 2019 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 1467 mSolverCounterSat, 374 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2049 SdHoareTripleChecker+Valid, 1580 SdHoareTripleChecker+Invalid, 1841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 374 IncrementalHoareTripleChecker+Valid, 1467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-17 21:05:57,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2049 Valid, 1580 Invalid, 1841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [374 Valid, 1467 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-17 21:05:57,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145035 states.