./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.14.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.14.cil.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 a6e26dc8018dcf216dd711848cc7425da3593cca9604197466413681bb8c438e --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 13:13:52,938 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 13:13:52,957 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 13:13:53,005 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 13:13:53,005 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 13:13:53,008 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 13:13:53,009 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 13:13:53,011 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 13:13:53,012 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 13:13:53,017 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 13:13:53,017 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 13:13:53,018 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 13:13:53,019 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 13:13:53,020 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 13:13:53,021 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 13:13:53,022 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 13:13:53,025 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 13:13:53,026 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 13:13:53,027 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 13:13:53,029 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 13:13:53,032 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 13:13:53,033 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 13:13:53,034 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 13:13:53,035 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 13:13:53,036 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 13:13:53,039 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 13:13:53,039 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 13:13:53,039 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 13:13:53,040 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 13:13:53,041 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 13:13:53,041 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 13:13:53,041 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 13:13:53,043 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 13:13:53,043 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 13:13:53,044 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 13:13:53,044 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 13:13:53,045 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 13:13:53,045 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 13:13:53,045 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 13:13:53,046 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 13:13:53,046 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 13:13:53,047 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 13:13:53,072 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 13:13:53,072 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 13:13:53,073 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 13:13:53,073 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 13:13:53,074 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 13:13:53,074 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 13:13:53,074 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 13:13:53,074 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 13:13:53,075 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 13:13:53,075 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 13:13:53,075 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 13:13:53,076 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 13:13:53,076 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 13:13:53,076 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 13:13:53,076 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 13:13:53,076 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 13:13:53,076 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 13:13:53,076 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 13:13:53,077 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 13:13:53,077 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 13:13:53,077 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 13:13:53,077 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 13:13:53,077 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 13:13:53,077 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 13:13:53,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:13:53,078 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 13:13:53,078 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 13:13:53,078 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 13:13:53,078 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 13:13:53,078 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 13:13:53,078 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 13:13:53,078 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 13:13:53,079 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 13:13:53,079 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 13:13:53,079 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a6e26dc8018dcf216dd711848cc7425da3593cca9604197466413681bb8c438e [2021-12-22 13:13:53,269 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 13:13:53,286 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 13:13:53,289 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 13:13:53,290 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 13:13:53,291 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 13:13:53,292 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.14.cil.c [2021-12-22 13:13:53,355 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80d61eafd/c39d17fb267b45a3ae20b53dad03f3b9/FLAG6e26bc45d [2021-12-22 13:13:53,758 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 13:13:53,758 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.14.cil.c [2021-12-22 13:13:53,770 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80d61eafd/c39d17fb267b45a3ae20b53dad03f3b9/FLAG6e26bc45d [2021-12-22 13:13:53,783 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80d61eafd/c39d17fb267b45a3ae20b53dad03f3b9 [2021-12-22 13:13:53,785 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 13:13:53,786 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 13:13:53,787 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 13:13:53,787 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 13:13:53,790 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 13:13:53,791 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:13:53" (1/1) ... [2021-12-22 13:13:53,792 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55435415 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:13:53, skipping insertion in model container [2021-12-22 13:13:53,792 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:13:53" (1/1) ... [2021-12-22 13:13:53,796 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 13:13:53,830 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 13:13:53,977 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.14.cil.c[914,927] [2021-12-22 13:13:54,020 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.14.cil.c[7115,7128] [2021-12-22 13:13:54,122 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:13:54,144 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 13:13:54,152 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.14.cil.c[914,927] [2021-12-22 13:13:54,184 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.14.cil.c[7115,7128] [2021-12-22 13:13:54,236 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:13:54,254 INFO L208 MainTranslator]: Completed translation [2021-12-22 13:13:54,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:13:54 WrapperNode [2021-12-22 13:13:54,255 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 13:13:54,256 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 13:13:54,256 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 13:13:54,256 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 13:13:54,264 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:13:54" (1/1) ... [2021-12-22 13:13:54,285 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:13:54" (1/1) ... [2021-12-22 13:13:54,324 INFO L137 Inliner]: procedures = 77, calls = 94, calls flagged for inlining = 45, calls inlined = 45, statements flattened = 1043 [2021-12-22 13:13:54,337 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 13:13:54,352 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 13:13:54,352 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 13:13:54,352 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 13:13:54,358 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:13:54" (1/1) ... [2021-12-22 13:13:54,358 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:13:54" (1/1) ... [2021-12-22 13:13:54,378 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:13:54" (1/1) ... [2021-12-22 13:13:54,379 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:13:54" (1/1) ... [2021-12-22 13:13:54,395 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:13:54" (1/1) ... [2021-12-22 13:13:54,405 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:13:54" (1/1) ... [2021-12-22 13:13:54,426 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:13:54" (1/1) ... [2021-12-22 13:13:54,432 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 13:13:54,432 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 13:13:54,432 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 13:13:54,432 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 13:13:54,438 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:13:54" (1/1) ... [2021-12-22 13:13:54,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:13:54,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:13:54,463 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 13:13:54,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 13:13:54,492 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 13:13:54,492 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-22 13:13:54,492 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-22 13:13:54,493 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-12-22 13:13:54,494 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-12-22 13:13:54,494 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-22 13:13:54,494 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-22 13:13:54,494 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-22 13:13:54,494 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-22 13:13:54,494 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-12-22 13:13:54,494 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-12-22 13:13:54,495 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-22 13:13:54,495 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-22 13:13:54,495 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-22 13:13:54,495 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-22 13:13:54,495 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-12-22 13:13:54,495 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-12-22 13:13:54,495 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-12-22 13:13:54,495 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-12-22 13:13:54,495 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-12-22 13:13:54,496 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-12-22 13:13:54,496 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-22 13:13:54,496 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-22 13:13:54,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 13:13:54,496 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-22 13:13:54,496 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-22 13:13:54,496 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-12-22 13:13:54,496 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-12-22 13:13:54,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 13:13:54,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 13:13:54,497 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-22 13:13:54,497 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-22 13:13:54,497 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-22 13:13:54,497 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-22 13:13:54,641 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 13:13:54,642 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 13:13:55,226 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 13:13:55,241 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 13:13:55,242 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2021-12-22 13:13:55,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:13:55 BoogieIcfgContainer [2021-12-22 13:13:55,244 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 13:13:55,246 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 13:13:55,246 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 13:13:55,248 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 13:13:55,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:13:53" (1/3) ... [2021-12-22 13:13:55,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37f79541 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:13:55, skipping insertion in model container [2021-12-22 13:13:55,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:13:54" (2/3) ... [2021-12-22 13:13:55,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37f79541 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:13:55, skipping insertion in model container [2021-12-22 13:13:55,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:13:55" (3/3) ... [2021-12-22 13:13:55,251 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.14.cil.c [2021-12-22 13:13:55,258 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 13:13:55,258 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-22 13:13:55,303 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 13:13:55,309 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 13:13:55,309 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-22 13:13:55,334 INFO L276 IsEmpty]: Start isEmpty. Operand has 489 states, 429 states have (on average 1.6433566433566433) internal successors, (705), 437 states have internal predecessors, (705), 42 states have call successors, (42), 15 states have call predecessors, (42), 15 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2021-12-22 13:13:55,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 13:13:55,342 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:13:55,342 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] [2021-12-22 13:13:55,343 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:13:55,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:13:55,346 INFO L85 PathProgramCache]: Analyzing trace with hash 956122995, now seen corresponding path program 1 times [2021-12-22 13:13:55,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:13:55,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608229278] [2021-12-22 13:13:55,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:13:55,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:13:55,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:55,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:13:55,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:55,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:13:55,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:55,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:13:55,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:55,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:13:55,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:55,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:13:55,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:55,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:13:55,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:55,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:13:55,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:55,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:13:55,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:13:55,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608229278] [2021-12-22 13:13:55,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608229278] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:13:55,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:13:55,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 13:13:55,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981830218] [2021-12-22 13:13:55,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:13:55,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 13:13:55,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:13:55,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 13:13:55,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:13:55,701 INFO L87 Difference]: Start difference. First operand has 489 states, 429 states have (on average 1.6433566433566433) internal successors, (705), 437 states have internal predecessors, (705), 42 states have call successors, (42), 15 states have call predecessors, (42), 15 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) 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) [2021-12-22 13:13:56,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:13:56,715 INFO L93 Difference]: Finished difference Result 1084 states and 1736 transitions. [2021-12-22 13:13:56,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:13:56,717 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 [2021-12-22 13:13:56,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:13:56,728 INFO L225 Difference]: With dead ends: 1084 [2021-12-22 13:13:56,728 INFO L226 Difference]: Without dead ends: 613 [2021-12-22 13:13:56,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-12-22 13:13:56,735 INFO L933 BasicCegarLoop]: 751 mSDtfsCounter, 1209 mSDsluCounter, 1791 mSDsCounter, 0 mSdLazyCounter, 1057 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1214 SdHoareTripleChecker+Valid, 2542 SdHoareTripleChecker+Invalid, 1259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 1057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-22 13:13:56,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1214 Valid, 2542 Invalid, 1259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 1057 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-22 13:13:56,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-12-22 13:13:56,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 574. [2021-12-22 13:13:56,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 497 states have (on average 1.529175050301811) internal successors, (760), 504 states have internal predecessors, (760), 53 states have call successors, (53), 22 states have call predecessors, (53), 22 states have return successors, (54), 50 states have call predecessors, (54), 49 states have call successors, (54) [2021-12-22 13:13:56,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 867 transitions. [2021-12-22 13:13:56,794 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 867 transitions. Word has length 65 [2021-12-22 13:13:56,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:13:56,795 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 867 transitions. [2021-12-22 13:13:56,795 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) [2021-12-22 13:13:56,795 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 867 transitions. [2021-12-22 13:13:56,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 13:13:56,798 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:13:56,799 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] [2021-12-22 13:13:56,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 13:13:56,799 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:13:56,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:13:56,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1359908946, now seen corresponding path program 1 times [2021-12-22 13:13:56,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:13:56,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817199002] [2021-12-22 13:13:56,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:13:56,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:13:56,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:56,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:13:56,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:56,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:13:56,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:56,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:13:56,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:56,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:13:56,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:56,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:13:56,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:56,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:13:56,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:56,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:13:56,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:56,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:13:56,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:13:56,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817199002] [2021-12-22 13:13:56,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817199002] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:13:56,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:13:56,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 13:13:56,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871601491] [2021-12-22 13:13:56,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:13:56,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 13:13:56,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:13:56,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 13:13:56,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:13:56,890 INFO L87 Difference]: Start difference. First operand 574 states and 867 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) [2021-12-22 13:13:57,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:13:57,869 INFO L93 Difference]: Finished difference Result 921 states and 1344 transitions. [2021-12-22 13:13:57,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-22 13:13:57,870 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 [2021-12-22 13:13:57,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:13:57,874 INFO L225 Difference]: With dead ends: 921 [2021-12-22 13:13:57,874 INFO L226 Difference]: Without dead ends: 744 [2021-12-22 13:13:57,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-12-22 13:13:57,876 INFO L933 BasicCegarLoop]: 780 mSDtfsCounter, 1480 mSDsluCounter, 1992 mSDsCounter, 0 mSdLazyCounter, 1298 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1512 SdHoareTripleChecker+Valid, 2772 SdHoareTripleChecker+Invalid, 1444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-22 13:13:57,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1512 Valid, 2772 Invalid, 1444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1298 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-22 13:13:57,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2021-12-22 13:13:57,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 670. [2021-12-22 13:13:57,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 573 states have (on average 1.5078534031413613) internal successors, (864), 582 states have internal predecessors, (864), 64 states have call successors, (64), 29 states have call predecessors, (64), 31 states have return successors, (73), 62 states have call predecessors, (73), 60 states have call successors, (73) [2021-12-22 13:13:57,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 1001 transitions. [2021-12-22 13:13:57,905 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 1001 transitions. Word has length 65 [2021-12-22 13:13:57,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:13:57,906 INFO L470 AbstractCegarLoop]: Abstraction has 670 states and 1001 transitions. [2021-12-22 13:13:57,906 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) [2021-12-22 13:13:57,906 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 1001 transitions. [2021-12-22 13:13:57,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 13:13:57,909 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:13:57,909 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] [2021-12-22 13:13:57,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 13:13:57,910 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:13:57,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:13:57,910 INFO L85 PathProgramCache]: Analyzing trace with hash -668677164, now seen corresponding path program 1 times [2021-12-22 13:13:57,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:13:57,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734931589] [2021-12-22 13:13:57,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:13:57,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:13:57,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:57,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:13:57,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:57,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:13:57,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:57,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:13:57,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:57,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:13:57,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:57,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:13:58,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:58,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:13:58,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:58,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:13:58,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:58,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:13:58,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:13:58,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734931589] [2021-12-22 13:13:58,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734931589] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:13:58,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:13:58,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 13:13:58,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469132454] [2021-12-22 13:13:58,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:13:58,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:13:58,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:13:58,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:13:58,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:13:58,010 INFO L87 Difference]: Start difference. First operand 670 states and 1001 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) [2021-12-22 13:13:58,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:13:58,909 INFO L93 Difference]: Finished difference Result 971 states and 1415 transitions. [2021-12-22 13:13:58,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 13:13:58,910 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 [2021-12-22 13:13:58,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:13:58,913 INFO L225 Difference]: With dead ends: 971 [2021-12-22 13:13:58,913 INFO L226 Difference]: Without dead ends: 704 [2021-12-22 13:13:58,914 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 [2021-12-22 13:13:58,915 INFO L933 BasicCegarLoop]: 723 mSDtfsCounter, 971 mSDsluCounter, 2328 mSDsCounter, 0 mSdLazyCounter, 1460 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 972 SdHoareTripleChecker+Valid, 3051 SdHoareTripleChecker+Invalid, 1607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-22 13:13:58,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [972 Valid, 3051 Invalid, 1607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1460 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-22 13:13:58,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-12-22 13:13:58,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 675. [2021-12-22 13:13:58,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 577 states have (on average 1.5008665511265165) internal successors, (866), 586 states have internal predecessors, (866), 64 states have call successors, (64), 29 states have call predecessors, (64), 32 states have return successors, (74), 63 states have call predecessors, (74), 60 states have call successors, (74) [2021-12-22 13:13:58,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 1004 transitions. [2021-12-22 13:13:58,953 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 1004 transitions. Word has length 65 [2021-12-22 13:13:58,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:13:58,954 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 1004 transitions. [2021-12-22 13:13:58,954 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) [2021-12-22 13:13:58,954 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 1004 transitions. [2021-12-22 13:13:58,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 13:13:58,956 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:13:58,956 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] [2021-12-22 13:13:58,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 13:13:58,956 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:13:58,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:13:58,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1698036462, now seen corresponding path program 1 times [2021-12-22 13:13:58,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:13:58,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034622746] [2021-12-22 13:13:58,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:13:58,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:13:58,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:58,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:13:58,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:59,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:13:59,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:59,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:13:59,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:59,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:13:59,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:59,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:13:59,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:59,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:13:59,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:59,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:13:59,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:13:59,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:13:59,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:13:59,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034622746] [2021-12-22 13:13:59,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034622746] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:13:59,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:13:59,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-22 13:13:59,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287447508] [2021-12-22 13:13:59,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:13:59,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:13:59,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:13:59,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:13:59,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:13:59,042 INFO L87 Difference]: Start difference. First operand 675 states and 1004 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-22 13:14:00,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:00,631 INFO L93 Difference]: Finished difference Result 1997 states and 2800 transitions. [2021-12-22 13:14:00,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-22 13:14:00,632 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 65 [2021-12-22 13:14:00,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:00,641 INFO L225 Difference]: With dead ends: 1997 [2021-12-22 13:14:00,641 INFO L226 Difference]: Without dead ends: 1707 [2021-12-22 13:14:00,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-12-22 13:14:00,650 INFO L933 BasicCegarLoop]: 825 mSDtfsCounter, 4059 mSDsluCounter, 1814 mSDsCounter, 0 mSdLazyCounter, 1545 mSolverCounterSat, 719 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4073 SdHoareTripleChecker+Valid, 2639 SdHoareTripleChecker+Invalid, 2264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 719 IncrementalHoareTripleChecker+Valid, 1545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:00,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4073 Valid, 2639 Invalid, 2264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [719 Valid, 1545 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-22 13:14:00,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1707 states. [2021-12-22 13:14:00,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1707 to 1576. [2021-12-22 13:14:00,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1576 states, 1292 states have (on average 1.3970588235294117) internal successors, (1805), 1316 states have internal predecessors, (1805), 152 states have call successors, (152), 112 states have call predecessors, (152), 130 states have return successors, (188), 150 states have call predecessors, (188), 148 states have call successors, (188) [2021-12-22 13:14:00,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 2145 transitions. [2021-12-22 13:14:00,741 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 2145 transitions. Word has length 65 [2021-12-22 13:14:00,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:00,741 INFO L470 AbstractCegarLoop]: Abstraction has 1576 states and 2145 transitions. [2021-12-22 13:14:00,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-22 13:14:00,742 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 2145 transitions. [2021-12-22 13:14:00,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 13:14:00,742 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:00,742 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] [2021-12-22 13:14:00,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 13:14:00,743 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:00,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:00,743 INFO L85 PathProgramCache]: Analyzing trace with hash -2104827032, now seen corresponding path program 1 times [2021-12-22 13:14:00,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:00,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361780037] [2021-12-22 13:14:00,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:00,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:00,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:00,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:00,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:00,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:14:00,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:00,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:14:00,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:00,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:14:00,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:00,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:14:00,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:00,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:14:00,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:00,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:14:00,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:00,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:14:00,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:00,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361780037] [2021-12-22 13:14:00,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361780037] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:00,835 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:00,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 13:14:00,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378930295] [2021-12-22 13:14:00,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:00,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:14:00,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:00,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:14:00,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:14:00,837 INFO L87 Difference]: Start difference. First operand 1576 states and 2145 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) [2021-12-22 13:14:01,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:01,705 INFO L93 Difference]: Finished difference Result 2867 states and 3818 transitions. [2021-12-22 13:14:01,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 13:14:01,706 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 [2021-12-22 13:14:01,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:01,711 INFO L225 Difference]: With dead ends: 2867 [2021-12-22 13:14:01,711 INFO L226 Difference]: Without dead ends: 1682 [2021-12-22 13:14:01,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-12-22 13:14:01,713 INFO L933 BasicCegarLoop]: 718 mSDtfsCounter, 652 mSDsluCounter, 2646 mSDsCounter, 0 mSdLazyCounter, 1505 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 654 SdHoareTripleChecker+Valid, 3364 SdHoareTripleChecker+Invalid, 1607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:01,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [654 Valid, 3364 Invalid, 1607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1505 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-22 13:14:01,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1682 states. [2021-12-22 13:14:01,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1682 to 1606. [2021-12-22 13:14:01,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1606 states, 1316 states have (on average 1.3837386018237081) internal successors, (1821), 1340 states have internal predecessors, (1821), 152 states have call successors, (152), 112 states have call predecessors, (152), 136 states have return successors, (194), 156 states have call predecessors, (194), 148 states have call successors, (194) [2021-12-22 13:14:01,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 2167 transitions. [2021-12-22 13:14:01,760 INFO L78 Accepts]: Start accepts. Automaton has 1606 states and 2167 transitions. Word has length 65 [2021-12-22 13:14:01,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:01,761 INFO L470 AbstractCegarLoop]: Abstraction has 1606 states and 2167 transitions. [2021-12-22 13:14:01,761 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) [2021-12-22 13:14:01,761 INFO L276 IsEmpty]: Start isEmpty. Operand 1606 states and 2167 transitions. [2021-12-22 13:14:01,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 13:14:01,762 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:01,762 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] [2021-12-22 13:14:01,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 13:14:01,762 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:01,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:01,762 INFO L85 PathProgramCache]: Analyzing trace with hash -718623638, now seen corresponding path program 1 times [2021-12-22 13:14:01,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:01,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536306992] [2021-12-22 13:14:01,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:01,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:01,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:01,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:01,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:01,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:14:01,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:01,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:14:01,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:01,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:14:01,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:01,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:14:01,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:01,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:14:01,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:01,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:14:01,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:01,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:14:01,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:01,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536306992] [2021-12-22 13:14:01,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536306992] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:01,844 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:01,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 13:14:01,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700155892] [2021-12-22 13:14:01,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:01,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 13:14:01,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:01,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 13:14:01,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:14:01,846 INFO L87 Difference]: Start difference. First operand 1606 states and 2167 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) [2021-12-22 13:14:02,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:02,742 INFO L93 Difference]: Finished difference Result 2861 states and 3714 transitions. [2021-12-22 13:14:02,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-22 13:14:02,742 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 [2021-12-22 13:14:02,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:02,748 INFO L225 Difference]: With dead ends: 2861 [2021-12-22 13:14:02,748 INFO L226 Difference]: Without dead ends: 1869 [2021-12-22 13:14:02,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-12-22 13:14:02,751 INFO L933 BasicCegarLoop]: 728 mSDtfsCounter, 1439 mSDsluCounter, 1767 mSDsCounter, 0 mSdLazyCounter, 1257 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1468 SdHoareTripleChecker+Valid, 2495 SdHoareTripleChecker+Invalid, 1406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:02,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1468 Valid, 2495 Invalid, 1406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 1257 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-22 13:14:02,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1869 states. [2021-12-22 13:14:02,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1869 to 1548. [2021-12-22 13:14:02,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1548 states, 1274 states have (on average 1.3814756671899528) internal successors, (1760), 1293 states have internal predecessors, (1760), 146 states have call successors, (146), 107 states have call predecessors, (146), 126 states have return successors, (179), 149 states have call predecessors, (179), 142 states have call successors, (179) [2021-12-22 13:14:02,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1548 states to 1548 states and 2085 transitions. [2021-12-22 13:14:02,797 INFO L78 Accepts]: Start accepts. Automaton has 1548 states and 2085 transitions. Word has length 65 [2021-12-22 13:14:02,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:02,797 INFO L470 AbstractCegarLoop]: Abstraction has 1548 states and 2085 transitions. [2021-12-22 13:14:02,797 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) [2021-12-22 13:14:02,798 INFO L276 IsEmpty]: Start isEmpty. Operand 1548 states and 2085 transitions. [2021-12-22 13:14:02,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-22 13:14:02,798 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:02,798 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] [2021-12-22 13:14:02,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 13:14:02,799 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:02,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:02,799 INFO L85 PathProgramCache]: Analyzing trace with hash -852637144, now seen corresponding path program 1 times [2021-12-22 13:14:02,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:02,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472317819] [2021-12-22 13:14:02,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:02,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:02,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:02,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:02,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:02,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:14:02,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:02,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:14:02,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:02,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:14:02,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:02,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:14:02,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:02,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:14:02,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:02,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:14:02,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:02,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:14:02,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:02,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472317819] [2021-12-22 13:14:02,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472317819] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:02,859 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:02,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:14:02,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047076548] [2021-12-22 13:14:02,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:02,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:14:02,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:02,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:14:02,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:14:02,860 INFO L87 Difference]: Start difference. First operand 1548 states and 2085 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) [2021-12-22 13:14:03,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:03,322 INFO L93 Difference]: Finished difference Result 3887 states and 5046 transitions. [2021-12-22 13:14:03,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-22 13:14:03,323 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 [2021-12-22 13:14:03,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:03,331 INFO L225 Difference]: With dead ends: 3887 [2021-12-22 13:14:03,331 INFO L226 Difference]: Without dead ends: 2731 [2021-12-22 13:14:03,334 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 [2021-12-22 13:14:03,335 INFO L933 BasicCegarLoop]: 700 mSDtfsCounter, 1410 mSDsluCounter, 1379 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1443 SdHoareTripleChecker+Valid, 2079 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:03,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1443 Valid, 2079 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 13:14:03,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2731 states. [2021-12-22 13:14:03,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2731 to 2611. [2021-12-22 13:14:03,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2611 states, 2094 states have (on average 1.3142311365807067) internal successors, (2752), 2130 states have internal predecessors, (2752), 265 states have call successors, (265), 206 states have call predecessors, (265), 250 states have return successors, (370), 277 states have call predecessors, (370), 261 states have call successors, (370) [2021-12-22 13:14:03,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2611 states to 2611 states and 3387 transitions. [2021-12-22 13:14:03,438 INFO L78 Accepts]: Start accepts. Automaton has 2611 states and 3387 transitions. Word has length 65 [2021-12-22 13:14:03,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:03,438 INFO L470 AbstractCegarLoop]: Abstraction has 2611 states and 3387 transitions. [2021-12-22 13:14:03,438 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) [2021-12-22 13:14:03,439 INFO L276 IsEmpty]: Start isEmpty. Operand 2611 states and 3387 transitions. [2021-12-22 13:14:03,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-22 13:14:03,439 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:03,439 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] [2021-12-22 13:14:03,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 13:14:03,440 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:03,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:03,440 INFO L85 PathProgramCache]: Analyzing trace with hash 20568174, now seen corresponding path program 1 times [2021-12-22 13:14:03,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:03,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322108059] [2021-12-22 13:14:03,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:03,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:03,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:03,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:03,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:03,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:14:03,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:03,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:14:03,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:03,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:14:03,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:03,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:14:03,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:03,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:14:03,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:03,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:14:03,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:03,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:14:03,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:03,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322108059] [2021-12-22 13:14:03,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322108059] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:03,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:03,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:14:03,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9041655] [2021-12-22 13:14:03,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:03,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:14:03,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:03,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:14:03,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:14:03,501 INFO L87 Difference]: Start difference. First operand 2611 states and 3387 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) [2021-12-22 13:14:04,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:04,168 INFO L93 Difference]: Finished difference Result 5927 states and 7532 transitions. [2021-12-22 13:14:04,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:14:04,169 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 [2021-12-22 13:14:04,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:04,180 INFO L225 Difference]: With dead ends: 5927 [2021-12-22 13:14:04,180 INFO L226 Difference]: Without dead ends: 3713 [2021-12-22 13:14:04,183 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 [2021-12-22 13:14:04,184 INFO L933 BasicCegarLoop]: 729 mSDtfsCounter, 828 mSDsluCounter, 1374 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 837 SdHoareTripleChecker+Valid, 2103 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:04,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [837 Valid, 2103 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 13:14:04,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3713 states. [2021-12-22 13:14:04,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3713 to 3445. [2021-12-22 13:14:04,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3445 states, 2742 states have (on average 1.2935813274981764) internal successors, (3547), 2783 states have internal predecessors, (3547), 357 states have call successors, (357), 286 states have call predecessors, (357), 344 states have return successors, (484), 378 states have call predecessors, (484), 353 states have call successors, (484) [2021-12-22 13:14:04,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3445 states to 3445 states and 4388 transitions. [2021-12-22 13:14:04,288 INFO L78 Accepts]: Start accepts. Automaton has 3445 states and 4388 transitions. Word has length 66 [2021-12-22 13:14:04,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:04,288 INFO L470 AbstractCegarLoop]: Abstraction has 3445 states and 4388 transitions. [2021-12-22 13:14:04,288 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) [2021-12-22 13:14:04,288 INFO L276 IsEmpty]: Start isEmpty. Operand 3445 states and 4388 transitions. [2021-12-22 13:14:04,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-22 13:14:04,289 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:04,289 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] [2021-12-22 13:14:04,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 13:14:04,290 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:04,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:04,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1226736109, now seen corresponding path program 1 times [2021-12-22 13:14:04,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:04,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532095509] [2021-12-22 13:14:04,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:04,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:04,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:04,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:04,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:04,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:14:04,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:04,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:14:04,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:04,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:14:04,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:04,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:14:04,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:04,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:14:04,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:04,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:14:04,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:04,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:14:04,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:04,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532095509] [2021-12-22 13:14:04,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532095509] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:04,344 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:04,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:14:04,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34705482] [2021-12-22 13:14:04,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:04,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:14:04,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:04,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:14:04,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:14:04,346 INFO L87 Difference]: Start difference. First operand 3445 states and 4388 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) [2021-12-22 13:14:04,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:04,774 INFO L93 Difference]: Finished difference Result 7317 states and 9162 transitions. [2021-12-22 13:14:04,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:14:04,775 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 [2021-12-22 13:14:04,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:04,788 INFO L225 Difference]: With dead ends: 7317 [2021-12-22 13:14:04,789 INFO L226 Difference]: Without dead ends: 4267 [2021-12-22 13:14:04,795 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 [2021-12-22 13:14:04,796 INFO L933 BasicCegarLoop]: 746 mSDtfsCounter, 1381 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1415 SdHoareTripleChecker+Valid, 1822 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:04,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1415 Valid, 1822 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 13:14:04,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4267 states. [2021-12-22 13:14:04,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4267 to 3999. [2021-12-22 13:14:04,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3999 states, 3182 states have (on average 1.2844123192960402) internal successors, (4087), 3227 states have internal predecessors, (4087), 413 states have call successors, (413), 336 states have call predecessors, (413), 402 states have return successors, (557), 438 states have call predecessors, (557), 409 states have call successors, (557) [2021-12-22 13:14:04,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3999 states to 3999 states and 5057 transitions. [2021-12-22 13:14:04,955 INFO L78 Accepts]: Start accepts. Automaton has 3999 states and 5057 transitions. Word has length 72 [2021-12-22 13:14:04,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:04,956 INFO L470 AbstractCegarLoop]: Abstraction has 3999 states and 5057 transitions. [2021-12-22 13:14:04,956 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) [2021-12-22 13:14:04,956 INFO L276 IsEmpty]: Start isEmpty. Operand 3999 states and 5057 transitions. [2021-12-22 13:14:04,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-22 13:14:04,958 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:04,958 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] [2021-12-22 13:14:04,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 13:14:04,958 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:04,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:04,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1142832314, now seen corresponding path program 1 times [2021-12-22 13:14:04,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:04,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824035058] [2021-12-22 13:14:04,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:04,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:04,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:05,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:05,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:05,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:14:05,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:05,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:14:05,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:05,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:14:05,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:05,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:14:05,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:05,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:14:05,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:05,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:14:05,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:05,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:14:05,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:05,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824035058] [2021-12-22 13:14:05,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824035058] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:05,035 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:05,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:14:05,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83623363] [2021-12-22 13:14:05,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:05,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:14:05,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:05,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:14:05,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:14:05,036 INFO L87 Difference]: Start difference. First operand 3999 states and 5057 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) [2021-12-22 13:14:05,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:05,535 INFO L93 Difference]: Finished difference Result 5085 states and 6352 transitions. [2021-12-22 13:14:05,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 13:14:05,535 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 [2021-12-22 13:14:05,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:05,551 INFO L225 Difference]: With dead ends: 5085 [2021-12-22 13:14:05,552 INFO L226 Difference]: Without dead ends: 5082 [2021-12-22 13:14:05,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-12-22 13:14:05,554 INFO L933 BasicCegarLoop]: 741 mSDtfsCounter, 2428 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 346 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2438 SdHoareTripleChecker+Valid, 1451 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:05,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2438 Valid, 1451 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [346 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 13:14:05,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5082 states. [2021-12-22 13:14:05,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5082 to 4461. [2021-12-22 13:14:05,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4461 states, 3537 states have (on average 1.2731128074639526) internal successors, (4503), 3585 states have internal predecessors, (4503), 463 states have call successors, (463), 380 states have call predecessors, (463), 459 states have return successors, (634), 498 states have call predecessors, (634), 460 states have call successors, (634) [2021-12-22 13:14:05,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4461 states to 4461 states and 5600 transitions. [2021-12-22 13:14:05,712 INFO L78 Accepts]: Start accepts. Automaton has 4461 states and 5600 transitions. Word has length 73 [2021-12-22 13:14:05,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:05,712 INFO L470 AbstractCegarLoop]: Abstraction has 4461 states and 5600 transitions. [2021-12-22 13:14:05,713 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) [2021-12-22 13:14:05,713 INFO L276 IsEmpty]: Start isEmpty. Operand 4461 states and 5600 transitions. [2021-12-22 13:14:05,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-22 13:14:05,714 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:05,714 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] [2021-12-22 13:14:05,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 13:14:05,714 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:05,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:05,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1069513385, now seen corresponding path program 1 times [2021-12-22 13:14:05,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:05,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313971524] [2021-12-22 13:14:05,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:05,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:05,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:05,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:05,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:05,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:14:05,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:05,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:14:05,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:05,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:14:05,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:05,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:14:05,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:05,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:14:05,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:05,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:14:05,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:05,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:14:05,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:05,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313971524] [2021-12-22 13:14:05,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313971524] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:14:05,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693892417] [2021-12-22 13:14:05,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:05,839 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:14:05,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:14:05,840 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) [2021-12-22 13:14:05,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 13:14:05,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:05,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-22 13:14:05,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:14:06,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:14:06,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:14:06,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:14:06,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693892417] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:14:06,465 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:14:06,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 10 [2021-12-22 13:14:06,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980210251] [2021-12-22 13:14:06,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:14:06,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-22 13:14:06,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:06,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-22 13:14:06,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:14:06,467 INFO L87 Difference]: Start difference. First operand 4461 states and 5600 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) [2021-12-22 13:14:07,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:07,929 INFO L93 Difference]: Finished difference Result 8779 states and 10809 transitions. [2021-12-22 13:14:07,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-22 13:14:07,930 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 [2021-12-22 13:14:07,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:07,956 INFO L225 Difference]: With dead ends: 8779 [2021-12-22 13:14:07,957 INFO L226 Difference]: Without dead ends: 8776 [2021-12-22 13:14:07,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 173 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=593, Unknown=0, NotChecked=0, Total=756 [2021-12-22 13:14:07,961 INFO L933 BasicCegarLoop]: 893 mSDtfsCounter, 2377 mSDsluCounter, 1648 mSDsCounter, 0 mSdLazyCounter, 1573 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2441 SdHoareTripleChecker+Valid, 2541 SdHoareTripleChecker+Invalid, 1888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 1573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:07,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2441 Valid, 2541 Invalid, 1888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 1573 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-22 13:14:07,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8776 states. [2021-12-22 13:14:08,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8776 to 7878. [2021-12-22 13:14:08,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7878 states, 6212 states have (on average 1.2533805537669027) internal successors, (7786), 6295 states have internal predecessors, (7786), 822 states have call successors, (822), 694 states have call predecessors, (822), 842 states have return successors, (1135), 891 states have call predecessors, (1135), 819 states have call successors, (1135) [2021-12-22 13:14:08,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7878 states to 7878 states and 9743 transitions. [2021-12-22 13:14:08,247 INFO L78 Accepts]: Start accepts. Automaton has 7878 states and 9743 transitions. Word has length 74 [2021-12-22 13:14:08,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:08,248 INFO L470 AbstractCegarLoop]: Abstraction has 7878 states and 9743 transitions. [2021-12-22 13:14:08,248 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) [2021-12-22 13:14:08,248 INFO L276 IsEmpty]: Start isEmpty. Operand 7878 states and 9743 transitions. [2021-12-22 13:14:08,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-22 13:14:08,249 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:08,249 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] [2021-12-22 13:14:08,287 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-22 13:14:08,462 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 [2021-12-22 13:14:08,463 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:08,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:08,463 INFO L85 PathProgramCache]: Analyzing trace with hash 850950662, now seen corresponding path program 2 times [2021-12-22 13:14:08,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:08,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489252133] [2021-12-22 13:14:08,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:08,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:08,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:08,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:08,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:08,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:14:08,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:08,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:14:08,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:08,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:14:08,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:08,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:14:08,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:08,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:14:08,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:08,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:14:08,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:08,526 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:14:08,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:08,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489252133] [2021-12-22 13:14:08,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489252133] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:08,527 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:08,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:14:08,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713579083] [2021-12-22 13:14:08,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:08,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:14:08,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:08,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:14:08,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:14:08,528 INFO L87 Difference]: Start difference. First operand 7878 states and 9743 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) [2021-12-22 13:14:09,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:09,087 INFO L93 Difference]: Finished difference Result 10472 states and 12952 transitions. [2021-12-22 13:14:09,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:14:09,088 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 [2021-12-22 13:14:09,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:09,102 INFO L225 Difference]: With dead ends: 10472 [2021-12-22 13:14:09,105 INFO L226 Difference]: Without dead ends: 4298 [2021-12-22 13:14:09,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:14:09,116 INFO L933 BasicCegarLoop]: 772 mSDtfsCounter, 1318 mSDsluCounter, 1112 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1354 SdHoareTripleChecker+Valid, 1884 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:09,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1354 Valid, 1884 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-22 13:14:09,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4298 states. [2021-12-22 13:14:09,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4298 to 3290. [2021-12-22 13:14:09,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3290 states, 2630 states have (on average 1.2688212927756655) internal successors, (3337), 2659 states have internal predecessors, (3337), 341 states have call successors, (341), 276 states have call predecessors, (341), 317 states have return successors, (434), 357 states have call predecessors, (434), 338 states have call successors, (434) [2021-12-22 13:14:09,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3290 states to 3290 states and 4112 transitions. [2021-12-22 13:14:09,284 INFO L78 Accepts]: Start accepts. Automaton has 3290 states and 4112 transitions. Word has length 77 [2021-12-22 13:14:09,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:09,284 INFO L470 AbstractCegarLoop]: Abstraction has 3290 states and 4112 transitions. [2021-12-22 13:14:09,284 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) [2021-12-22 13:14:09,284 INFO L276 IsEmpty]: Start isEmpty. Operand 3290 states and 4112 transitions. [2021-12-22 13:14:09,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-22 13:14:09,286 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:09,286 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] [2021-12-22 13:14:09,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 13:14:09,287 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:09,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:09,287 INFO L85 PathProgramCache]: Analyzing trace with hash -416080695, now seen corresponding path program 1 times [2021-12-22 13:14:09,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:09,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334535290] [2021-12-22 13:14:09,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:09,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:09,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:09,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:09,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:09,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:14:09,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:09,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:14:09,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:09,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:14:09,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:09,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:14:09,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:09,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:14:09,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:09,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:14:09,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:09,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-22 13:14:09,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:09,357 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-22 13:14:09,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:09,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334535290] [2021-12-22 13:14:09,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334535290] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:09,357 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:09,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-22 13:14:09,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485913799] [2021-12-22 13:14:09,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:09,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-22 13:14:09,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:09,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-22 13:14:09,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:14:09,358 INFO L87 Difference]: Start difference. First operand 3290 states and 4112 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) [2021-12-22 13:14:10,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:10,406 INFO L93 Difference]: Finished difference Result 9074 states and 11109 transitions. [2021-12-22 13:14:10,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-22 13:14:10,407 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 [2021-12-22 13:14:10,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:10,421 INFO L225 Difference]: With dead ends: 9074 [2021-12-22 13:14:10,422 INFO L226 Difference]: Without dead ends: 5376 [2021-12-22 13:14:10,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-12-22 13:14:10,430 INFO L933 BasicCegarLoop]: 771 mSDtfsCounter, 1894 mSDsluCounter, 1442 mSDsCounter, 0 mSdLazyCounter, 1043 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1906 SdHoareTripleChecker+Valid, 2213 SdHoareTripleChecker+Invalid, 1406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 1043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:10,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1906 Valid, 2213 Invalid, 1406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 1043 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-22 13:14:10,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5376 states. [2021-12-22 13:14:10,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5376 to 5116. [2021-12-22 13:14:10,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5116 states, 4021 states have (on average 1.2302909723949267) internal successors, (4947), 4087 states have internal predecessors, (4947), 541 states have call successors, (541), 448 states have call predecessors, (541), 552 states have return successors, (784), 583 states have call predecessors, (784), 538 states have call successors, (784) [2021-12-22 13:14:10,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5116 states to 5116 states and 6272 transitions. [2021-12-22 13:14:10,646 INFO L78 Accepts]: Start accepts. Automaton has 5116 states and 6272 transitions. Word has length 84 [2021-12-22 13:14:10,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:10,646 INFO L470 AbstractCegarLoop]: Abstraction has 5116 states and 6272 transitions. [2021-12-22 13:14:10,646 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) [2021-12-22 13:14:10,646 INFO L276 IsEmpty]: Start isEmpty. Operand 5116 states and 6272 transitions. [2021-12-22 13:14:10,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-22 13:14:10,649 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:10,650 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] [2021-12-22 13:14:10,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 13:14:10,650 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:10,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:10,650 INFO L85 PathProgramCache]: Analyzing trace with hash 322850660, now seen corresponding path program 1 times [2021-12-22 13:14:10,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:10,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636748131] [2021-12-22 13:14:10,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:10,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:10,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:10,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:10,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:10,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:14:10,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:10,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:14:10,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:10,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:14:10,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:10,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:14:10,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:10,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:14:10,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:10,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:14:10,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:10,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-22 13:14:10,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:10,719 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-22 13:14:10,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:10,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636748131] [2021-12-22 13:14:10,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636748131] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:10,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:10,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-22 13:14:10,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826391595] [2021-12-22 13:14:10,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:10,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 13:14:10,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:10,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 13:14:10,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:14:10,721 INFO L87 Difference]: Start difference. First operand 5116 states and 6272 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) [2021-12-22 13:14:11,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:11,734 INFO L93 Difference]: Finished difference Result 8476 states and 10290 transitions. [2021-12-22 13:14:11,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-22 13:14:11,734 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 [2021-12-22 13:14:11,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:11,745 INFO L225 Difference]: With dead ends: 8476 [2021-12-22 13:14:11,746 INFO L226 Difference]: Without dead ends: 4277 [2021-12-22 13:14:11,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2021-12-22 13:14:11,754 INFO L933 BasicCegarLoop]: 754 mSDtfsCounter, 1953 mSDsluCounter, 1815 mSDsCounter, 0 mSdLazyCounter, 1388 mSolverCounterSat, 322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1992 SdHoareTripleChecker+Valid, 2569 SdHoareTripleChecker+Invalid, 1710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 322 IncrementalHoareTripleChecker+Valid, 1388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:11,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1992 Valid, 2569 Invalid, 1710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [322 Valid, 1388 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-22 13:14:11,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4277 states. [2021-12-22 13:14:11,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4277 to 3856. [2021-12-22 13:14:11,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3856 states, 3027 states have (on average 1.2226627023455567) internal successors, (3701), 3081 states have internal predecessors, (3701), 406 states have call successors, (406), 330 states have call predecessors, (406), 421 states have return successors, (553), 447 states have call predecessors, (553), 403 states have call successors, (553) [2021-12-22 13:14:11,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3856 states to 3856 states and 4660 transitions. [2021-12-22 13:14:11,931 INFO L78 Accepts]: Start accepts. Automaton has 3856 states and 4660 transitions. Word has length 93 [2021-12-22 13:14:11,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:11,932 INFO L470 AbstractCegarLoop]: Abstraction has 3856 states and 4660 transitions. [2021-12-22 13:14:11,932 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) [2021-12-22 13:14:11,932 INFO L276 IsEmpty]: Start isEmpty. Operand 3856 states and 4660 transitions. [2021-12-22 13:14:11,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-22 13:14:11,934 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:11,935 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:14:11,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 13:14:11,935 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:11,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:11,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1648604991, now seen corresponding path program 1 times [2021-12-22 13:14:11,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:11,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434022459] [2021-12-22 13:14:11,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:11,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:11,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:11,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:11,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:11,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:14:11,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:11,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:14:11,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:11,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:14:11,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:11,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:14:11,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:11,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:14:11,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:11,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:14:11,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:11,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-22 13:14:12,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:12,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-22 13:14:12,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:12,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-22 13:14:12,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:12,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-22 13:14:12,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:12,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:14:12,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:12,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:14:12,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:12,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-22 13:14:12,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:12,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-22 13:14:12,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:12,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-22 13:14:12,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:12,031 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-22 13:14:12,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:12,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434022459] [2021-12-22 13:14:12,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434022459] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:14:12,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312145806] [2021-12-22 13:14:12,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:12,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:14:12,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:14:12,048 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:14:12,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 13:14:12,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:12,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-22 13:14:12,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:14:12,336 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-22 13:14:12,336 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 13:14:12,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312145806] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:12,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 13:14:12,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 12 [2021-12-22 13:14:12,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590068401] [2021-12-22 13:14:12,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:12,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:14:12,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:12,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:14:12,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-12-22 13:14:12,342 INFO L87 Difference]: Start difference. First operand 3856 states and 4660 transitions. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-22 13:14:12,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:12,468 INFO L93 Difference]: Finished difference Result 5731 states and 6899 transitions. [2021-12-22 13:14:12,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:14:12,468 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 145 [2021-12-22 13:14:12,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:12,474 INFO L225 Difference]: With dead ends: 5731 [2021-12-22 13:14:12,474 INFO L226 Difference]: Without dead ends: 2272 [2021-12-22 13:14:12,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-22 13:14:12,481 INFO L933 BasicCegarLoop]: 732 mSDtfsCounter, 34 mSDsluCounter, 2891 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 3623 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:12,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 3623 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:14:12,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2272 states. [2021-12-22 13:14:12,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2272 to 2150. [2021-12-22 13:14:12,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2150 states, 1767 states have (on average 1.2512733446519524) internal successors, (2211), 1784 states have internal predecessors, (2211), 195 states have call successors, (195), 144 states have call predecessors, (195), 186 states have return successors, (260), 222 states have call predecessors, (260), 192 states have call successors, (260) [2021-12-22 13:14:12,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2150 states to 2150 states and 2666 transitions. [2021-12-22 13:14:12,557 INFO L78 Accepts]: Start accepts. Automaton has 2150 states and 2666 transitions. Word has length 145 [2021-12-22 13:14:12,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:12,558 INFO L470 AbstractCegarLoop]: Abstraction has 2150 states and 2666 transitions. [2021-12-22 13:14:12,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-22 13:14:12,558 INFO L276 IsEmpty]: Start isEmpty. Operand 2150 states and 2666 transitions. [2021-12-22 13:14:12,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-22 13:14:12,561 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:12,561 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:14:12,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 13:14:12,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-22 13:14:12,778 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:12,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:12,778 INFO L85 PathProgramCache]: Analyzing trace with hash 2137728743, now seen corresponding path program 1 times [2021-12-22 13:14:12,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:12,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089910969] [2021-12-22 13:14:12,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:12,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:12,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:12,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:12,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:12,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:14:12,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:12,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:14:12,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:12,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:14:12,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:12,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:14:12,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:12,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:14:12,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:12,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:14:12,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:12,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-22 13:14:12,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:12,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-22 13:14:12,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:12,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-22 13:14:12,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:12,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-22 13:14:12,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:12,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:14:12,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:12,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:14:12,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:12,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-22 13:14:12,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:12,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-22 13:14:12,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:12,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-22 13:14:12,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:12,853 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-22 13:14:12,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:12,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089910969] [2021-12-22 13:14:12,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089910969] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:12,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:12,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:14:12,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125306511] [2021-12-22 13:14:12,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:12,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:14:12,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:12,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:14:12,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:14:12,855 INFO L87 Difference]: Start difference. First operand 2150 states and 2666 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-22 13:14:13,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:13,350 INFO L93 Difference]: Finished difference Result 2198 states and 2716 transitions. [2021-12-22 13:14:13,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:14:13,350 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 147 [2021-12-22 13:14:13,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:13,354 INFO L225 Difference]: With dead ends: 2198 [2021-12-22 13:14:13,354 INFO L226 Difference]: Without dead ends: 1824 [2021-12-22 13:14:13,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:14:13,355 INFO L933 BasicCegarLoop]: 712 mSDtfsCounter, 1068 mSDsluCounter, 984 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1080 SdHoareTripleChecker+Valid, 1696 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:13,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1080 Valid, 1696 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 13:14:13,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1824 states. [2021-12-22 13:14:13,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1824 to 1779. [2021-12-22 13:14:13,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1779 states, 1480 states have (on average 1.2736486486486487) internal successors, (1885), 1494 states have internal predecessors, (1885), 154 states have call successors, (154), 109 states have call predecessors, (154), 143 states have return successors, (205), 176 states have call predecessors, (205), 151 states have call successors, (205) [2021-12-22 13:14:13,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1779 states to 1779 states and 2244 transitions. [2021-12-22 13:14:13,415 INFO L78 Accepts]: Start accepts. Automaton has 1779 states and 2244 transitions. Word has length 147 [2021-12-22 13:14:13,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:13,415 INFO L470 AbstractCegarLoop]: Abstraction has 1779 states and 2244 transitions. [2021-12-22 13:14:13,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-22 13:14:13,415 INFO L276 IsEmpty]: Start isEmpty. Operand 1779 states and 2244 transitions. [2021-12-22 13:14:13,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-22 13:14:13,417 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:13,417 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:14:13,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-22 13:14:13,418 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:13,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:13,418 INFO L85 PathProgramCache]: Analyzing trace with hash -2127164153, now seen corresponding path program 1 times [2021-12-22 13:14:13,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:13,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737059216] [2021-12-22 13:14:13,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:13,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:13,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:13,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:13,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:13,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:14:13,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:13,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:14:13,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:13,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:14:13,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:13,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:14:13,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:13,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:14:13,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:13,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:14:13,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:13,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-22 13:14:13,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:13,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-22 13:14:13,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:13,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-22 13:14:13,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:13,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-22 13:14:13,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:13,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:14:13,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:13,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:14:13,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:13,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-22 13:14:13,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:13,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-22 13:14:13,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:13,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-22 13:14:13,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:13,488 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-22 13:14:13,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:13,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737059216] [2021-12-22 13:14:13,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737059216] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:13,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:13,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:14:13,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768290353] [2021-12-22 13:14:13,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:13,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:14:13,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:13,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:14:13,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:14:13,491 INFO L87 Difference]: Start difference. First operand 1779 states and 2244 transitions. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-22 13:14:14,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:14,120 INFO L93 Difference]: Finished difference Result 3045 states and 3743 transitions. [2021-12-22 13:14:14,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-22 13:14:14,120 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 159 [2021-12-22 13:14:14,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:14,124 INFO L225 Difference]: With dead ends: 3045 [2021-12-22 13:14:14,125 INFO L226 Difference]: Without dead ends: 1752 [2021-12-22 13:14:14,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:14:14,129 INFO L933 BasicCegarLoop]: 744 mSDtfsCounter, 681 mSDsluCounter, 1806 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 2550 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:14,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [682 Valid, 2550 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-22 13:14:14,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1752 states. [2021-12-22 13:14:14,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1752 to 1668. [2021-12-22 13:14:14,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1668 states, 1393 states have (on average 1.2835606604450827) internal successors, (1788), 1407 states have internal predecessors, (1788), 142 states have call successors, (142), 99 states have call predecessors, (142), 131 states have return successors, (187), 162 states have call predecessors, (187), 139 states have call successors, (187) [2021-12-22 13:14:14,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1668 states to 1668 states and 2117 transitions. [2021-12-22 13:14:14,192 INFO L78 Accepts]: Start accepts. Automaton has 1668 states and 2117 transitions. Word has length 159 [2021-12-22 13:14:14,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:14,192 INFO L470 AbstractCegarLoop]: Abstraction has 1668 states and 2117 transitions. [2021-12-22 13:14:14,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-22 13:14:14,192 INFO L276 IsEmpty]: Start isEmpty. Operand 1668 states and 2117 transitions. [2021-12-22 13:14:14,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-22 13:14:14,195 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:14,195 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:14:14,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-22 13:14:14,195 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:14,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:14,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1961116033, now seen corresponding path program 1 times [2021-12-22 13:14:14,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:14,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980472992] [2021-12-22 13:14:14,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:14,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:14,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:14,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:14,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:14,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-22 13:14:14,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:14,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-22 13:14:14,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:14,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:14:14,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:14,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:14:14,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:14,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-22 13:14:14,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:14,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 13:14:14,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:14,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-22 13:14:14,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:14,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-22 13:14:14,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:14,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-22 13:14:14,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:14,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-22 13:14:14,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:14,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-22 13:14:14,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:14,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-22 13:14:14,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:14,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-22 13:14:14,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:14,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-22 13:14:14,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:14,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-22 13:14:14,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:14,377 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-22 13:14:14,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:14,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980472992] [2021-12-22 13:14:14,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980472992] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:14:14,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668350295] [2021-12-22 13:14:14,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:14,378 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:14:14,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:14:14,379 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 13:14:14,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 13:14:14,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:14,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-22 13:14:14,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:14:14,756 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 61 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-22 13:14:14,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:14:15,194 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-12-22 13:14:15,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668350295] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:14:15,194 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:14:15,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2021-12-22 13:14:15,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41888724] [2021-12-22 13:14:15,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:14:15,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 13:14:15,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:15,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 13:14:15,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-12-22 13:14:15,195 INFO L87 Difference]: Start difference. First operand 1668 states and 2117 transitions. Second operand has 14 states, 14 states have (on average 17.571428571428573) internal successors, (246), 12 states have internal predecessors, (246), 6 states have call successors, (38), 8 states have call predecessors, (38), 10 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) [2021-12-22 13:14:16,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:16,303 INFO L93 Difference]: Finished difference Result 3404 states and 4256 transitions. [2021-12-22 13:14:16,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-22 13:14:16,303 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 17.571428571428573) internal successors, (246), 12 states have internal predecessors, (246), 6 states have call successors, (38), 8 states have call predecessors, (38), 10 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) Word has length 162 [2021-12-22 13:14:16,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:16,309 INFO L225 Difference]: With dead ends: 3404 [2021-12-22 13:14:16,309 INFO L226 Difference]: Without dead ends: 2059 [2021-12-22 13:14:16,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 354 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=232, Invalid=638, Unknown=0, NotChecked=0, Total=870 [2021-12-22 13:14:16,311 INFO L933 BasicCegarLoop]: 679 mSDtfsCounter, 2456 mSDsluCounter, 1374 mSDsCounter, 0 mSdLazyCounter, 1513 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2487 SdHoareTripleChecker+Valid, 2053 SdHoareTripleChecker+Invalid, 1903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 1513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:16,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2487 Valid, 2053 Invalid, 1903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 1513 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-22 13:14:16,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2059 states. [2021-12-22 13:14:16,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2059 to 1946. [2021-12-22 13:14:16,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1946 states, 1596 states have (on average 1.2474937343358397) internal successors, (1991), 1611 states have internal predecessors, (1991), 182 states have call successors, (182), 137 states have call predecessors, (182), 166 states have return successors, (256), 198 states have call predecessors, (256), 179 states have call successors, (256) [2021-12-22 13:14:16,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1946 states to 1946 states and 2429 transitions. [2021-12-22 13:14:16,397 INFO L78 Accepts]: Start accepts. Automaton has 1946 states and 2429 transitions. Word has length 162 [2021-12-22 13:14:16,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:16,398 INFO L470 AbstractCegarLoop]: Abstraction has 1946 states and 2429 transitions. [2021-12-22 13:14:16,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 17.571428571428573) internal successors, (246), 12 states have internal predecessors, (246), 6 states have call successors, (38), 8 states have call predecessors, (38), 10 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) [2021-12-22 13:14:16,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1946 states and 2429 transitions. [2021-12-22 13:14:16,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-22 13:14:16,400 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:16,400 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:14:16,433 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-22 13:14:16,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-22 13:14:16,636 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:16,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:16,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1484709716, now seen corresponding path program 1 times [2021-12-22 13:14:16,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:16,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036760915] [2021-12-22 13:14:16,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:16,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:16,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:16,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:16,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:16,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-22 13:14:16,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:16,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:14:16,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:16,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-22 13:14:16,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:16,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-22 13:14:16,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:16,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:14:16,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:16,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036760915] [2021-12-22 13:14:16,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036760915] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:16,773 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:16,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 13:14:16,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279963142] [2021-12-22 13:14:16,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:16,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:14:16,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:16,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:14:16,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:14:16,774 INFO L87 Difference]: Start difference. First operand 1946 states and 2429 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:14:18,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:18,067 INFO L93 Difference]: Finished difference Result 2461 states and 3263 transitions. [2021-12-22 13:14:18,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:14:18,067 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-22 13:14:18,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:18,072 INFO L225 Difference]: With dead ends: 2461 [2021-12-22 13:14:18,072 INFO L226 Difference]: Without dead ends: 2088 [2021-12-22 13:14:18,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:14:18,074 INFO L933 BasicCegarLoop]: 790 mSDtfsCounter, 1139 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1163 SdHoareTripleChecker+Valid, 1388 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:18,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1163 Valid, 1388 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-22 13:14:18,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2088 states. [2021-12-22 13:14:18,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2088 to 1946. [2021-12-22 13:14:18,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1946 states, 1596 states have (on average 1.2468671679197996) internal successors, (1990), 1611 states have internal predecessors, (1990), 182 states have call successors, (182), 137 states have call predecessors, (182), 166 states have return successors, (256), 198 states have call predecessors, (256), 179 states have call successors, (256) [2021-12-22 13:14:18,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1946 states to 1946 states and 2428 transitions. [2021-12-22 13:14:18,187 INFO L78 Accepts]: Start accepts. Automaton has 1946 states and 2428 transitions. Word has length 179 [2021-12-22 13:14:18,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:18,187 INFO L470 AbstractCegarLoop]: Abstraction has 1946 states and 2428 transitions. [2021-12-22 13:14:18,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:14:18,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1946 states and 2428 transitions. [2021-12-22 13:14:18,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-22 13:14:18,189 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:18,189 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:14:18,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-22 13:14:18,190 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:18,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:18,190 INFO L85 PathProgramCache]: Analyzing trace with hash -794878226, now seen corresponding path program 1 times [2021-12-22 13:14:18,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:18,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452565532] [2021-12-22 13:14:18,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:18,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:18,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:18,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:18,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:18,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-22 13:14:18,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:18,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:14:18,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:18,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-22 13:14:18,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:18,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-22 13:14:18,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:18,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:14:18,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:18,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452565532] [2021-12-22 13:14:18,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452565532] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:18,294 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:18,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 13:14:18,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472907855] [2021-12-22 13:14:18,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:18,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:14:18,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:18,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:14:18,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:14:18,296 INFO L87 Difference]: Start difference. First operand 1946 states and 2428 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:14:19,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:19,481 INFO L93 Difference]: Finished difference Result 2453 states and 3246 transitions. [2021-12-22 13:14:19,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:14:19,481 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-22 13:14:19,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:19,485 INFO L225 Difference]: With dead ends: 2453 [2021-12-22 13:14:19,485 INFO L226 Difference]: Without dead ends: 2088 [2021-12-22 13:14:19,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-22 13:14:19,486 INFO L933 BasicCegarLoop]: 789 mSDtfsCounter, 1130 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1154 SdHoareTripleChecker+Valid, 1386 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:19,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1154 Valid, 1386 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-22 13:14:19,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2088 states. [2021-12-22 13:14:19,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2088 to 1946. [2021-12-22 13:14:19,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1946 states, 1596 states have (on average 1.2462406015037595) internal successors, (1989), 1611 states have internal predecessors, (1989), 182 states have call successors, (182), 137 states have call predecessors, (182), 166 states have return successors, (256), 198 states have call predecessors, (256), 179 states have call successors, (256) [2021-12-22 13:14:19,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1946 states to 1946 states and 2427 transitions. [2021-12-22 13:14:19,597 INFO L78 Accepts]: Start accepts. Automaton has 1946 states and 2427 transitions. Word has length 179 [2021-12-22 13:14:19,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:19,597 INFO L470 AbstractCegarLoop]: Abstraction has 1946 states and 2427 transitions. [2021-12-22 13:14:19,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-22 13:14:19,597 INFO L276 IsEmpty]: Start isEmpty. Operand 1946 states and 2427 transitions. [2021-12-22 13:14:19,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-22 13:14:19,599 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:19,599 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:14:19,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-22 13:14:19,599 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:19,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:19,600 INFO L85 PathProgramCache]: Analyzing trace with hash -8880336, now seen corresponding path program 1 times [2021-12-22 13:14:19,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:19,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089167278] [2021-12-22 13:14:19,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:19,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:19,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:19,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:19,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:19,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-22 13:14:19,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:19,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:14:19,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:19,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-22 13:14:19,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:19,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-22 13:14:19,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:19,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:14:19,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:19,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089167278] [2021-12-22 13:14:19,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089167278] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:19,697 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:19,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 13:14:19,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341233126] [2021-12-22 13:14:19,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:19,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 13:14:19,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:19,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 13:14:19,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 13:14:19,698 INFO L87 Difference]: Start difference. First operand 1946 states and 2427 transitions. Second operand has 6 states, 6 states have (on average 28.0) internal successors, (168), 4 states have internal predecessors, (168), 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) [2021-12-22 13:14:22,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:22,191 INFO L93 Difference]: Finished difference Result 2972 states and 4090 transitions. [2021-12-22 13:14:22,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-22 13:14:22,192 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.0) internal successors, (168), 4 states have internal predecessors, (168), 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 179 [2021-12-22 13:14:22,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:22,197 INFO L225 Difference]: With dead ends: 2972 [2021-12-22 13:14:22,198 INFO L226 Difference]: Without dead ends: 2610 [2021-12-22 13:14:22,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:14:22,200 INFO L933 BasicCegarLoop]: 827 mSDtfsCounter, 1785 mSDsluCounter, 1182 mSDsCounter, 0 mSdLazyCounter, 2056 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1814 SdHoareTripleChecker+Valid, 2009 SdHoareTripleChecker+Invalid, 2220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 2056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:22,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1814 Valid, 2009 Invalid, 2220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 2056 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-22 13:14:22,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2610 states. [2021-12-22 13:14:22,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2610 to 2325. [2021-12-22 13:14:22,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2325 states, 1947 states have (on average 1.310220852593734) internal successors, (2551), 1963 states have internal predecessors, (2551), 203 states have call successors, (203), 143 states have call predecessors, (203), 173 states have return successors, (280), 219 states have call predecessors, (280), 200 states have call successors, (280) [2021-12-22 13:14:22,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2325 states to 2325 states and 3034 transitions. [2021-12-22 13:14:22,334 INFO L78 Accepts]: Start accepts. Automaton has 2325 states and 3034 transitions. Word has length 179 [2021-12-22 13:14:22,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:22,334 INFO L470 AbstractCegarLoop]: Abstraction has 2325 states and 3034 transitions. [2021-12-22 13:14:22,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.0) internal successors, (168), 4 states have internal predecessors, (168), 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) [2021-12-22 13:14:22,334 INFO L276 IsEmpty]: Start isEmpty. Operand 2325 states and 3034 transitions. [2021-12-22 13:14:22,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-22 13:14:22,337 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:22,337 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:14:22,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-22 13:14:22,338 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:22,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:22,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1394620116, now seen corresponding path program 1 times [2021-12-22 13:14:22,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:22,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097455063] [2021-12-22 13:14:22,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:22,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:22,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:22,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:22,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:22,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-22 13:14:22,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:22,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:14:22,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:22,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-22 13:14:22,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:22,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-22 13:14:22,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:22,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:14:22,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:22,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097455063] [2021-12-22 13:14:22,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097455063] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:22,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:22,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:14:22,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169686456] [2021-12-22 13:14:22,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:22,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:14:22,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:22,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:14:22,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:14:22,449 INFO L87 Difference]: Start difference. First operand 2325 states and 3034 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-22 13:14:25,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:25,137 INFO L93 Difference]: Finished difference Result 3893 states and 5582 transitions. [2021-12-22 13:14:25,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:14:25,144 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2021-12-22 13:14:25,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:25,160 INFO L225 Difference]: With dead ends: 3893 [2021-12-22 13:14:25,160 INFO L226 Difference]: Without dead ends: 3152 [2021-12-22 13:14:25,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-22 13:14:25,166 INFO L933 BasicCegarLoop]: 1132 mSDtfsCounter, 1817 mSDsluCounter, 2191 mSDsCounter, 0 mSdLazyCounter, 3245 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1846 SdHoareTripleChecker+Valid, 3323 SdHoareTripleChecker+Invalid, 3369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 3245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:25,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1846 Valid, 3323 Invalid, 3369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 3245 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-22 13:14:25,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3152 states. [2021-12-22 13:14:25,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3152 to 2678. [2021-12-22 13:14:25,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2678 states, 2272 states have (on average 1.3472711267605635) internal successors, (3061), 2289 states have internal predecessors, (3061), 224 states have call successors, (224), 149 states have call predecessors, (224), 180 states have return successors, (303), 241 states have call predecessors, (303), 221 states have call successors, (303) [2021-12-22 13:14:25,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2678 states to 2678 states and 3588 transitions. [2021-12-22 13:14:25,322 INFO L78 Accepts]: Start accepts. Automaton has 2678 states and 3588 transitions. Word has length 179 [2021-12-22 13:14:25,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:25,322 INFO L470 AbstractCegarLoop]: Abstraction has 2678 states and 3588 transitions. [2021-12-22 13:14:25,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-22 13:14:25,323 INFO L276 IsEmpty]: Start isEmpty. Operand 2678 states and 3588 transitions. [2021-12-22 13:14:25,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-22 13:14:25,324 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:25,325 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:14:25,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-22 13:14:25,325 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:25,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:25,325 INFO L85 PathProgramCache]: Analyzing trace with hash -2005889174, now seen corresponding path program 1 times [2021-12-22 13:14:25,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:25,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053272658] [2021-12-22 13:14:25,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:25,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:25,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:25,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:25,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:25,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-22 13:14:25,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:25,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:14:25,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:25,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-22 13:14:25,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:25,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-22 13:14:25,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:25,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:14:25,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:25,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053272658] [2021-12-22 13:14:25,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053272658] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:25,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:25,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:14:25,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528322901] [2021-12-22 13:14:25,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:25,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:14:25,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:25,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:14:25,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:14:25,448 INFO L87 Difference]: Start difference. First operand 2678 states and 3588 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-22 13:14:26,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:26,987 INFO L93 Difference]: Finished difference Result 4262 states and 6174 transitions. [2021-12-22 13:14:26,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:14:26,987 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2021-12-22 13:14:26,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:26,997 INFO L225 Difference]: With dead ends: 4262 [2021-12-22 13:14:26,998 INFO L226 Difference]: Without dead ends: 3168 [2021-12-22 13:14:27,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:14:27,002 INFO L933 BasicCegarLoop]: 766 mSDtfsCounter, 1564 mSDsluCounter, 907 mSDsCounter, 0 mSdLazyCounter, 1436 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1594 SdHoareTripleChecker+Valid, 1673 SdHoareTripleChecker+Invalid, 1603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 1436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:27,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1594 Valid, 1673 Invalid, 1603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 1436 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-22 13:14:27,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3168 states. [2021-12-22 13:14:27,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3168 to 2678. [2021-12-22 13:14:27,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2678 states, 2272 states have (on average 1.345950704225352) internal successors, (3058), 2289 states have internal predecessors, (3058), 224 states have call successors, (224), 149 states have call predecessors, (224), 180 states have return successors, (303), 241 states have call predecessors, (303), 221 states have call successors, (303) [2021-12-22 13:14:27,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2678 states to 2678 states and 3585 transitions. [2021-12-22 13:14:27,165 INFO L78 Accepts]: Start accepts. Automaton has 2678 states and 3585 transitions. Word has length 179 [2021-12-22 13:14:27,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:27,165 INFO L470 AbstractCegarLoop]: Abstraction has 2678 states and 3585 transitions. [2021-12-22 13:14:27,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-22 13:14:27,165 INFO L276 IsEmpty]: Start isEmpty. Operand 2678 states and 3585 transitions. [2021-12-22 13:14:27,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-22 13:14:27,168 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:27,168 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:14:27,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-22 13:14:27,168 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:27,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:27,169 INFO L85 PathProgramCache]: Analyzing trace with hash 883886444, now seen corresponding path program 1 times [2021-12-22 13:14:27,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:27,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584255924] [2021-12-22 13:14:27,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:27,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:27,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:27,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:27,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:27,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-22 13:14:27,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:27,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:14:27,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:27,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-22 13:14:27,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:27,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-22 13:14:27,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:27,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:14:27,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:27,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584255924] [2021-12-22 13:14:27,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584255924] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:27,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:27,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:14:27,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686401860] [2021-12-22 13:14:27,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:27,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:14:27,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:27,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:14:27,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:14:27,312 INFO L87 Difference]: Start difference. First operand 2678 states and 3585 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-22 13:14:29,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:29,131 INFO L93 Difference]: Finished difference Result 4258 states and 6157 transitions. [2021-12-22 13:14:29,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:14:29,132 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2021-12-22 13:14:29,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:29,139 INFO L225 Difference]: With dead ends: 4258 [2021-12-22 13:14:29,139 INFO L226 Difference]: Without dead ends: 3164 [2021-12-22 13:14:29,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:14:29,142 INFO L933 BasicCegarLoop]: 762 mSDtfsCounter, 1343 mSDsluCounter, 1157 mSDsCounter, 0 mSdLazyCounter, 1605 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1373 SdHoareTripleChecker+Valid, 1919 SdHoareTripleChecker+Invalid, 1729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:29,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1373 Valid, 1919 Invalid, 1729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1605 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-22 13:14:29,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3164 states. [2021-12-22 13:14:29,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3164 to 2678. [2021-12-22 13:14:29,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2678 states, 2272 states have (on average 1.3446302816901408) internal successors, (3055), 2289 states have internal predecessors, (3055), 224 states have call successors, (224), 149 states have call predecessors, (224), 180 states have return successors, (303), 241 states have call predecessors, (303), 221 states have call successors, (303) [2021-12-22 13:14:29,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2678 states to 2678 states and 3582 transitions. [2021-12-22 13:14:29,302 INFO L78 Accepts]: Start accepts. Automaton has 2678 states and 3582 transitions. Word has length 179 [2021-12-22 13:14:29,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:29,302 INFO L470 AbstractCegarLoop]: Abstraction has 2678 states and 3582 transitions. [2021-12-22 13:14:29,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-22 13:14:29,303 INFO L276 IsEmpty]: Start isEmpty. Operand 2678 states and 3582 transitions. [2021-12-22 13:14:29,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-22 13:14:29,305 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:29,305 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:14:29,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-22 13:14:29,305 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:29,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:29,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1516746966, now seen corresponding path program 1 times [2021-12-22 13:14:29,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:29,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724119168] [2021-12-22 13:14:29,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:29,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:29,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:29,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:29,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:29,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-22 13:14:29,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:29,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:14:29,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:29,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-22 13:14:29,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:29,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-22 13:14:29,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:29,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:14:29,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:29,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724119168] [2021-12-22 13:14:29,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724119168] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:29,416 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:29,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:14:29,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451910527] [2021-12-22 13:14:29,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:29,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:14:29,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:29,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:14:29,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:14:29,417 INFO L87 Difference]: Start difference. First operand 2678 states and 3582 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-22 13:14:32,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:32,038 INFO L93 Difference]: Finished difference Result 5241 states and 7712 transitions. [2021-12-22 13:14:32,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:14:32,038 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2021-12-22 13:14:32,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:32,050 INFO L225 Difference]: With dead ends: 5241 [2021-12-22 13:14:32,050 INFO L226 Difference]: Without dead ends: 4147 [2021-12-22 13:14:32,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-22 13:14:32,055 INFO L933 BasicCegarLoop]: 1113 mSDtfsCounter, 1798 mSDsluCounter, 2187 mSDsCounter, 0 mSdLazyCounter, 3198 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1827 SdHoareTripleChecker+Valid, 3300 SdHoareTripleChecker+Invalid, 3323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 3198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:32,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1827 Valid, 3300 Invalid, 3323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 3198 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-22 13:14:32,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4147 states. [2021-12-22 13:14:32,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4147 to 3393. [2021-12-22 13:14:32,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3393 states, 2931 states have (on average 1.39338109860116) internal successors, (4084), 2950 states have internal predecessors, (4084), 266 states have call successors, (266), 161 states have call predecessors, (266), 194 states have return successors, (353), 285 states have call predecessors, (353), 263 states have call successors, (353) [2021-12-22 13:14:32,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3393 states to 3393 states and 4703 transitions. [2021-12-22 13:14:32,336 INFO L78 Accepts]: Start accepts. Automaton has 3393 states and 4703 transitions. Word has length 179 [2021-12-22 13:14:32,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:32,336 INFO L470 AbstractCegarLoop]: Abstraction has 3393 states and 4703 transitions. [2021-12-22 13:14:32,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-22 13:14:32,336 INFO L276 IsEmpty]: Start isEmpty. Operand 3393 states and 4703 transitions. [2021-12-22 13:14:32,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-22 13:14:32,339 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:32,339 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:14:32,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-22 13:14:32,340 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:32,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:32,340 INFO L85 PathProgramCache]: Analyzing trace with hash -70166100, now seen corresponding path program 1 times [2021-12-22 13:14:32,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:32,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388224660] [2021-12-22 13:14:32,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:32,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:32,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:32,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:32,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:32,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-22 13:14:32,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:32,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:14:32,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:32,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-22 13:14:32,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:32,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-22 13:14:32,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:32,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:14:32,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:32,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388224660] [2021-12-22 13:14:32,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388224660] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:32,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:32,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:14:32,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710904118] [2021-12-22 13:14:32,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:32,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:14:32,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:32,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:14:32,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:14:32,449 INFO L87 Difference]: Start difference. First operand 3393 states and 4703 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-22 13:14:33,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:33,875 INFO L93 Difference]: Finished difference Result 5942 states and 8820 transitions. [2021-12-22 13:14:33,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:14:33,875 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2021-12-22 13:14:33,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:33,884 INFO L225 Difference]: With dead ends: 5942 [2021-12-22 13:14:33,884 INFO L226 Difference]: Without dead ends: 4133 [2021-12-22 13:14:33,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:14:33,888 INFO L933 BasicCegarLoop]: 755 mSDtfsCounter, 1342 mSDsluCounter, 1157 mSDsCounter, 0 mSdLazyCounter, 1586 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1372 SdHoareTripleChecker+Valid, 1912 SdHoareTripleChecker+Invalid, 1710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:33,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1372 Valid, 1912 Invalid, 1710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1586 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-22 13:14:33,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4133 states. [2021-12-22 13:14:34,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4133 to 3393. [2021-12-22 13:14:34,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3393 states, 2931 states have (on average 1.3916751961787786) internal successors, (4079), 2950 states have internal predecessors, (4079), 266 states have call successors, (266), 161 states have call predecessors, (266), 194 states have return successors, (353), 285 states have call predecessors, (353), 263 states have call successors, (353) [2021-12-22 13:14:34,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3393 states to 3393 states and 4698 transitions. [2021-12-22 13:14:34,150 INFO L78 Accepts]: Start accepts. Automaton has 3393 states and 4698 transitions. Word has length 179 [2021-12-22 13:14:34,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:34,150 INFO L470 AbstractCegarLoop]: Abstraction has 3393 states and 4698 transitions. [2021-12-22 13:14:34,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-22 13:14:34,150 INFO L276 IsEmpty]: Start isEmpty. Operand 3393 states and 4698 transitions. [2021-12-22 13:14:34,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-22 13:14:34,153 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:34,154 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:14:34,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-22 13:14:34,154 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:34,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:34,154 INFO L85 PathProgramCache]: Analyzing trace with hash -993333526, now seen corresponding path program 1 times [2021-12-22 13:14:34,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:34,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592701280] [2021-12-22 13:14:34,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:34,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:34,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:34,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:34,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:34,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-22 13:14:34,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:34,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:14:34,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:34,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-22 13:14:34,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:34,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-22 13:14:34,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:34,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:14:34,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:34,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592701280] [2021-12-22 13:14:34,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592701280] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:34,259 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:34,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:14:34,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87630707] [2021-12-22 13:14:34,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:34,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:14:34,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:34,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:14:34,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:14:34,261 INFO L87 Difference]: Start difference. First operand 3393 states and 4698 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-22 13:14:37,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:37,622 INFO L93 Difference]: Finished difference Result 7852 states and 11825 transitions. [2021-12-22 13:14:37,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:14:37,623 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2021-12-22 13:14:37,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:37,640 INFO L225 Difference]: With dead ends: 7852 [2021-12-22 13:14:37,640 INFO L226 Difference]: Without dead ends: 6043 [2021-12-22 13:14:37,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-22 13:14:37,645 INFO L933 BasicCegarLoop]: 1102 mSDtfsCounter, 1790 mSDsluCounter, 2187 mSDsCounter, 0 mSdLazyCounter, 3171 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1819 SdHoareTripleChecker+Valid, 3289 SdHoareTripleChecker+Invalid, 3296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 3171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:37,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1819 Valid, 3289 Invalid, 3296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 3171 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-22 13:14:37,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6043 states. [2021-12-22 13:14:37,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6043 to 4827. [2021-12-22 13:14:37,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4827 states, 4253 states have (on average 1.4425111685868799) internal successors, (6135), 4276 states have internal predecessors, (6135), 350 states have call successors, (350), 185 states have call predecessors, (350), 222 states have return successors, (459), 373 states have call predecessors, (459), 347 states have call successors, (459) [2021-12-22 13:14:37,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4827 states to 4827 states and 6944 transitions. [2021-12-22 13:14:37,997 INFO L78 Accepts]: Start accepts. Automaton has 4827 states and 6944 transitions. Word has length 179 [2021-12-22 13:14:37,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:37,997 INFO L470 AbstractCegarLoop]: Abstraction has 4827 states and 6944 transitions. [2021-12-22 13:14:37,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-22 13:14:37,997 INFO L276 IsEmpty]: Start isEmpty. Operand 4827 states and 6944 transitions. [2021-12-22 13:14:38,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-22 13:14:38,000 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:38,000 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:14:38,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-22 13:14:38,000 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:38,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:38,000 INFO L85 PathProgramCache]: Analyzing trace with hash -607471124, now seen corresponding path program 1 times [2021-12-22 13:14:38,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:38,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791549346] [2021-12-22 13:14:38,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:38,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:38,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:38,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:38,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:38,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-22 13:14:38,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:38,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:14:38,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:38,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-22 13:14:38,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:38,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-22 13:14:38,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:38,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:14:38,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:38,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791549346] [2021-12-22 13:14:38,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791549346] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:38,116 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:38,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:14:38,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139873376] [2021-12-22 13:14:38,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:38,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:14:38,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:38,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:14:38,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:14:38,119 INFO L87 Difference]: Start difference. First operand 4827 states and 6944 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-22 13:14:39,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:39,833 INFO L93 Difference]: Finished difference Result 9306 states and 14139 transitions. [2021-12-22 13:14:39,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:14:39,834 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2021-12-22 13:14:39,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:39,847 INFO L225 Difference]: With dead ends: 9306 [2021-12-22 13:14:39,848 INFO L226 Difference]: Without dead ends: 6063 [2021-12-22 13:14:39,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:14:39,855 INFO L933 BasicCegarLoop]: 746 mSDtfsCounter, 1563 mSDsluCounter, 907 mSDsCounter, 0 mSdLazyCounter, 1393 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1593 SdHoareTripleChecker+Valid, 1653 SdHoareTripleChecker+Invalid, 1563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 1393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:39,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1593 Valid, 1653 Invalid, 1563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 1393 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-22 13:14:39,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6063 states. [2021-12-22 13:14:40,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6063 to 4827. [2021-12-22 13:14:40,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4827 states, 4253 states have (on average 1.4403950152833294) internal successors, (6126), 4276 states have internal predecessors, (6126), 350 states have call successors, (350), 185 states have call predecessors, (350), 222 states have return successors, (459), 373 states have call predecessors, (459), 347 states have call successors, (459) [2021-12-22 13:14:40,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4827 states to 4827 states and 6935 transitions. [2021-12-22 13:14:40,264 INFO L78 Accepts]: Start accepts. Automaton has 4827 states and 6935 transitions. Word has length 179 [2021-12-22 13:14:40,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:40,264 INFO L470 AbstractCegarLoop]: Abstraction has 4827 states and 6935 transitions. [2021-12-22 13:14:40,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-22 13:14:40,265 INFO L276 IsEmpty]: Start isEmpty. Operand 4827 states and 6935 transitions. [2021-12-22 13:14:40,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-22 13:14:40,268 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:40,268 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:14:40,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-22 13:14:40,268 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:40,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:40,268 INFO L85 PathProgramCache]: Analyzing trace with hash -872118614, now seen corresponding path program 1 times [2021-12-22 13:14:40,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:40,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321414018] [2021-12-22 13:14:40,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:40,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:40,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:40,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:40,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:40,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-22 13:14:40,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:40,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:14:40,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:40,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-22 13:14:40,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:40,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-22 13:14:40,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:40,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:14:40,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:40,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321414018] [2021-12-22 13:14:40,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321414018] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:40,389 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:40,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:14:40,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013456299] [2021-12-22 13:14:40,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:40,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:14:40,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:40,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:14:40,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:14:40,391 INFO L87 Difference]: Start difference. First operand 4827 states and 6935 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-22 13:14:42,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:42,499 INFO L93 Difference]: Finished difference Result 9286 states and 14072 transitions. [2021-12-22 13:14:42,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:14:42,500 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2021-12-22 13:14:42,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:42,513 INFO L225 Difference]: With dead ends: 9286 [2021-12-22 13:14:42,514 INFO L226 Difference]: Without dead ends: 6043 [2021-12-22 13:14:42,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:14:42,522 INFO L933 BasicCegarLoop]: 740 mSDtfsCounter, 1340 mSDsluCounter, 1157 mSDsCounter, 0 mSdLazyCounter, 1546 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1370 SdHoareTripleChecker+Valid, 1897 SdHoareTripleChecker+Invalid, 1673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:42,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1370 Valid, 1897 Invalid, 1673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1546 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-22 13:14:42,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6043 states. [2021-12-22 13:14:42,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6043 to 4827. [2021-12-22 13:14:42,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4827 states, 4253 states have (on average 1.438278861979779) internal successors, (6117), 4276 states have internal predecessors, (6117), 350 states have call successors, (350), 185 states have call predecessors, (350), 222 states have return successors, (459), 373 states have call predecessors, (459), 347 states have call successors, (459) [2021-12-22 13:14:42,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4827 states to 4827 states and 6926 transitions. [2021-12-22 13:14:42,939 INFO L78 Accepts]: Start accepts. Automaton has 4827 states and 6926 transitions. Word has length 179 [2021-12-22 13:14:42,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:42,939 INFO L470 AbstractCegarLoop]: Abstraction has 4827 states and 6926 transitions. [2021-12-22 13:14:42,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-22 13:14:42,940 INFO L276 IsEmpty]: Start isEmpty. Operand 4827 states and 6926 transitions. [2021-12-22 13:14:42,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-22 13:14:42,942 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:42,942 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:14:42,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-22 13:14:42,943 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:42,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:42,943 INFO L85 PathProgramCache]: Analyzing trace with hash 2099669736, now seen corresponding path program 1 times [2021-12-22 13:14:42,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:42,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047626613] [2021-12-22 13:14:42,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:42,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:42,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:42,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:42,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:43,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-22 13:14:43,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:43,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:14:43,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:43,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-22 13:14:43,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:43,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-22 13:14:43,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:43,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:14:43,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:43,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047626613] [2021-12-22 13:14:43,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047626613] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:43,056 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:43,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:14:43,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714945301] [2021-12-22 13:14:43,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:43,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:14:43,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:43,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:14:43,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:14:43,058 INFO L87 Difference]: Start difference. First operand 4827 states and 6926 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-22 13:14:44,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:44,973 INFO L93 Difference]: Finished difference Result 9276 states and 14025 transitions. [2021-12-22 13:14:44,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:14:44,973 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2021-12-22 13:14:44,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:44,986 INFO L225 Difference]: With dead ends: 9276 [2021-12-22 13:14:44,987 INFO L226 Difference]: Without dead ends: 6033 [2021-12-22 13:14:44,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:14:44,994 INFO L933 BasicCegarLoop]: 736 mSDtfsCounter, 1557 mSDsluCounter, 907 mSDsCounter, 0 mSdLazyCounter, 1369 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1587 SdHoareTripleChecker+Valid, 1643 SdHoareTripleChecker+Invalid, 1539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 1369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:44,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1587 Valid, 1643 Invalid, 1539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 1369 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-22 13:14:44,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6033 states. [2021-12-22 13:14:45,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6033 to 4827. [2021-12-22 13:14:45,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4827 states, 4253 states have (on average 1.4361627086762285) internal successors, (6108), 4276 states have internal predecessors, (6108), 350 states have call successors, (350), 185 states have call predecessors, (350), 222 states have return successors, (459), 373 states have call predecessors, (459), 347 states have call successors, (459) [2021-12-22 13:14:45,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4827 states to 4827 states and 6917 transitions. [2021-12-22 13:14:45,425 INFO L78 Accepts]: Start accepts. Automaton has 4827 states and 6917 transitions. Word has length 179 [2021-12-22 13:14:45,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:45,425 INFO L470 AbstractCegarLoop]: Abstraction has 4827 states and 6917 transitions. [2021-12-22 13:14:45,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-22 13:14:45,425 INFO L276 IsEmpty]: Start isEmpty. Operand 4827 states and 6917 transitions. [2021-12-22 13:14:45,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-22 13:14:45,428 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:45,428 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:14:45,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-22 13:14:45,429 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:45,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:45,429 INFO L85 PathProgramCache]: Analyzing trace with hash -298318102, now seen corresponding path program 1 times [2021-12-22 13:14:45,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:45,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476935089] [2021-12-22 13:14:45,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:45,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:45,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:45,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:45,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:45,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-22 13:14:45,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:45,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:14:45,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:45,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-22 13:14:45,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:45,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-22 13:14:45,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:45,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:14:45,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:45,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476935089] [2021-12-22 13:14:45,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476935089] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:45,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:45,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:14:45,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275158161] [2021-12-22 13:14:45,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:45,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:14:45,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:45,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:14:45,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:14:45,624 INFO L87 Difference]: Start difference. First operand 4827 states and 6917 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-22 13:14:49,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:49,676 INFO L93 Difference]: Finished difference Result 13044 states and 19901 transitions. [2021-12-22 13:14:49,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 13:14:49,677 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2021-12-22 13:14:49,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:49,695 INFO L225 Difference]: With dead ends: 13044 [2021-12-22 13:14:49,696 INFO L226 Difference]: Without dead ends: 9801 [2021-12-22 13:14:49,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-22 13:14:49,707 INFO L933 BasicCegarLoop]: 1073 mSDtfsCounter, 1767 mSDsluCounter, 2187 mSDsCounter, 0 mSdLazyCounter, 3093 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1796 SdHoareTripleChecker+Valid, 3260 SdHoareTripleChecker+Invalid, 3221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 3093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:49,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1796 Valid, 3260 Invalid, 3221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 3093 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-22 13:14:49,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9801 states. [2021-12-22 13:14:50,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9801 to 7736. [2021-12-22 13:14:50,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7736 states, 6938 states have (on average 1.4773710002882676) internal successors, (10250), 6969 states have internal predecessors, (10250), 518 states have call successors, (518), 233 states have call predecessors, (518), 278 states have return successors, (689), 549 states have call predecessors, (689), 515 states have call successors, (689) [2021-12-22 13:14:50,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7736 states to 7736 states and 11457 transitions. [2021-12-22 13:14:50,409 INFO L78 Accepts]: Start accepts. Automaton has 7736 states and 11457 transitions. Word has length 179 [2021-12-22 13:14:50,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:50,410 INFO L470 AbstractCegarLoop]: Abstraction has 7736 states and 11457 transitions. [2021-12-22 13:14:50,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-22 13:14:50,410 INFO L276 IsEmpty]: Start isEmpty. Operand 7736 states and 11457 transitions. [2021-12-22 13:14:50,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-22 13:14:50,414 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:50,414 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:14:50,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-22 13:14:50,414 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:50,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:50,415 INFO L85 PathProgramCache]: Analyzing trace with hash 39969448, now seen corresponding path program 1 times [2021-12-22 13:14:50,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:50,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135271504] [2021-12-22 13:14:50,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:50,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:50,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:50,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:50,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:50,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-22 13:14:50,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:50,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:14:50,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:50,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-22 13:14:50,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:50,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-22 13:14:50,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:50,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:14:50,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:50,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135271504] [2021-12-22 13:14:50,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135271504] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:50,516 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:50,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:14:50,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645041242] [2021-12-22 13:14:50,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:50,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:14:50,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:50,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:14:50,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:14:50,518 INFO L87 Difference]: Start difference. First operand 7736 states and 11457 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-22 13:14:53,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:14:53,231 INFO L93 Difference]: Finished difference Result 16010 states and 24628 transitions. [2021-12-22 13:14:53,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:14:53,232 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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 179 [2021-12-22 13:14:53,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:14:53,257 INFO L225 Difference]: With dead ends: 16010 [2021-12-22 13:14:53,257 INFO L226 Difference]: Without dead ends: 9858 [2021-12-22 13:14:53,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:14:53,271 INFO L933 BasicCegarLoop]: 729 mSDtfsCounter, 1335 mSDsluCounter, 1155 mSDsCounter, 0 mSdLazyCounter, 1517 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1365 SdHoareTripleChecker+Valid, 1884 SdHoareTripleChecker+Invalid, 1646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-22 13:14:53,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1365 Valid, 1884 Invalid, 1646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1517 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-22 13:14:53,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9858 states. [2021-12-22 13:14:53,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9858 to 7736. [2021-12-22 13:14:53,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7736 states, 6938 states have (on average 1.4749207264341309) internal successors, (10233), 6969 states have internal predecessors, (10233), 518 states have call successors, (518), 233 states have call predecessors, (518), 278 states have return successors, (689), 549 states have call predecessors, (689), 515 states have call successors, (689) [2021-12-22 13:14:53,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7736 states to 7736 states and 11440 transitions. [2021-12-22 13:14:53,997 INFO L78 Accepts]: Start accepts. Automaton has 7736 states and 11440 transitions. Word has length 179 [2021-12-22 13:14:53,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:14:53,997 INFO L470 AbstractCegarLoop]: Abstraction has 7736 states and 11440 transitions. [2021-12-22 13:14:53,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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) [2021-12-22 13:14:53,997 INFO L276 IsEmpty]: Start isEmpty. Operand 7736 states and 11440 transitions. [2021-12-22 13:14:54,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-22 13:14:54,001 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:14:54,001 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:14:54,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-12-22 13:14:54,001 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:14:54,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:14:54,002 INFO L85 PathProgramCache]: Analyzing trace with hash 466523946, now seen corresponding path program 1 times [2021-12-22 13:14:54,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:14:54,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145389605] [2021-12-22 13:14:54,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:14:54,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:14:54,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:54,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-22 13:14:54,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:54,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-22 13:14:54,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:54,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-22 13:14:54,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:54,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-22 13:14:54,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:54,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-22 13:14:54,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:14:54,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:14:54,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:14:54,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145389605] [2021-12-22 13:14:54,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145389605] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:14:54,118 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:14:54,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:14:54,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069873465] [2021-12-22 13:14:54,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:14:54,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:14:54,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:14:54,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:14:54,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:14:54,120 INFO L87 Difference]: Start difference. First operand 7736 states and 11440 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 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)