./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-1.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 5fa3500dbb7b48d33bda6025d194df10b5d868e3a16ab8452fef68790ebc5c6f --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 21:09:13,190 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 21:09:13,192 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 21:09:13,251 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 21:09:13,255 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 21:09:13,256 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 21:09:13,257 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 21:09:13,260 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 21:09:13,262 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 21:09:13,262 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 21:09:13,263 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 21:09:13,265 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 21:09:13,265 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 21:09:13,270 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 21:09:13,272 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 21:09:13,273 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 21:09:13,274 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 21:09:13,275 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 21:09:13,276 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 21:09:13,280 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 21:09:13,282 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 21:09:13,283 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 21:09:13,284 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 21:09:13,285 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 21:09:13,289 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 21:09:13,291 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 21:09:13,291 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 21:09:13,292 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 21:09:13,293 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 21:09:13,294 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 21:09:13,294 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 21:09:13,294 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 21:09:13,295 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 21:09:13,296 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 21:09:13,297 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 21:09:13,298 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 21:09:13,298 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 21:09:13,298 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 21:09:13,299 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 21:09:13,299 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 21:09:13,300 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 21:09:13,300 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 21:09:13,319 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 21:09:13,319 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 21:09:13,320 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 21:09:13,320 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 21:09:13,321 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 21:09:13,321 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 21:09:13,322 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 21:09:13,322 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 21:09:13,322 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 21:09:13,322 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 21:09:13,323 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 21:09:13,323 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 21:09:13,323 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 21:09:13,323 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 21:09:13,323 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 21:09:13,324 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 21:09:13,324 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 21:09:13,324 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 21:09:13,324 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 21:09:13,324 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 21:09:13,324 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 21:09:13,325 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 21:09:13,325 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 21:09:13,325 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 21:09:13,325 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 21:09:13,325 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 21:09:13,325 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 21:09:13,326 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 21:09:13,327 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 21:09:13,327 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 21:09:13,327 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 21:09:13,327 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 21:09:13,327 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 21:09:13,328 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 21:09:13,328 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5fa3500dbb7b48d33bda6025d194df10b5d868e3a16ab8452fef68790ebc5c6f [2021-12-17 21:09:13,565 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 21:09:13,596 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 21:09:13,598 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 21:09:13,599 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 21:09:13,600 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 21:09:13,601 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-1.c [2021-12-17 21:09:13,657 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b32f6454e/8934a72f1494475197cea520174511d3/FLAG7dbc4d65a [2021-12-17 21:09:14,064 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 21:09:14,068 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_3.cil+token_ring.10.cil-1.c [2021-12-17 21:09:14,088 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b32f6454e/8934a72f1494475197cea520174511d3/FLAG7dbc4d65a [2021-12-17 21:09:14,439 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b32f6454e/8934a72f1494475197cea520174511d3 [2021-12-17 21:09:14,441 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 21:09:14,442 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 21:09:14,443 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 21:09:14,443 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 21:09:14,445 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 21:09:14,445 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:09:14" (1/1) ... [2021-12-17 21:09:14,446 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46e3c262 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:09:14, skipping insertion in model container [2021-12-17 21:09:14,446 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:09:14" (1/1) ... [2021-12-17 21:09:14,450 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 21:09:14,476 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 21:09:14,589 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_3.cil+token_ring.10.cil-1.c[911,924] [2021-12-17 21:09:14,623 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_3.cil+token_ring.10.cil-1.c[8416,8429] [2021-12-17 21:09:14,685 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 21:09:14,696 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 21:09:14,706 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_3.cil+token_ring.10.cil-1.c[911,924] [2021-12-17 21:09:14,719 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_3.cil+token_ring.10.cil-1.c[8416,8429] [2021-12-17 21:09:14,772 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 21:09:14,795 INFO L208 MainTranslator]: Completed translation [2021-12-17 21:09:14,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:09:14 WrapperNode [2021-12-17 21:09:14,796 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 21:09:14,797 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 21:09:14,797 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 21:09:14,797 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 21:09:14,802 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:09:14" (1/1) ... [2021-12-17 21:09:14,822 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:09:14" (1/1) ... [2021-12-17 21:09:14,876 INFO L137 Inliner]: procedures = 75, calls = 92, calls flagged for inlining = 43, calls inlined = 43, statements flattened = 967 [2021-12-17 21:09:14,876 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 21:09:14,877 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 21:09:14,877 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 21:09:14,877 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 21:09:14,887 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:09:14" (1/1) ... [2021-12-17 21:09:14,887 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:09:14" (1/1) ... [2021-12-17 21:09:14,891 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:09:14" (1/1) ... [2021-12-17 21:09:14,891 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:09:14" (1/1) ... [2021-12-17 21:09:14,907 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:09:14" (1/1) ... [2021-12-17 21:09:14,932 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:09:14" (1/1) ... [2021-12-17 21:09:14,934 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:09:14" (1/1) ... [2021-12-17 21:09:14,938 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 21:09:14,939 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 21:09:14,939 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 21:09:14,939 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 21:09:14,956 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:09:14" (1/1) ... [2021-12-17 21:09:14,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 21:09:14,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:09:14,982 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 21:09:15,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 21:09:15,016 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 21:09:15,017 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-17 21:09:15,017 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-17 21:09:15,017 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-12-17 21:09:15,018 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-12-17 21:09:15,018 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-17 21:09:15,018 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-17 21:09:15,019 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-17 21:09:15,019 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-17 21:09:15,019 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-12-17 21:09:15,019 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-12-17 21:09:15,019 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-17 21:09:15,019 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-17 21:09:15,019 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-17 21:09:15,019 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-17 21:09:15,020 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-12-17 21:09:15,020 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-12-17 21:09:15,020 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-12-17 21:09:15,020 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-12-17 21:09:15,020 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-12-17 21:09:15,020 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-12-17 21:09:15,020 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-17 21:09:15,020 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-17 21:09:15,021 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 21:09:15,021 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-17 21:09:15,021 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-17 21:09:15,021 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-12-17 21:09:15,021 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-12-17 21:09:15,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 21:09:15,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 21:09:15,021 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-17 21:09:15,021 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-17 21:09:15,022 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-17 21:09:15,022 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-17 21:09:15,160 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 21:09:15,162 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 21:09:15,658 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##56: assume !(1 == ~q_free~0); [2021-12-17 21:09:15,658 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##55: assume 1 == ~q_free~0;~c_dr_st~0 := 2;~c_dr_pc~0 := 2;~a_t~0 := do_read_c_~a~0#1; [2021-12-17 21:09:15,717 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 21:09:15,729 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 21:09:15,729 INFO L301 CfgBuilder]: Removed 17 assume(true) statements. [2021-12-17 21:09:15,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:09:15 BoogieIcfgContainer [2021-12-17 21:09:15,731 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 21:09:15,732 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 21:09:15,732 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 21:09:15,734 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 21:09:15,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 09:09:14" (1/3) ... [2021-12-17 21:09:15,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2557817f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:09:15, skipping insertion in model container [2021-12-17 21:09:15,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:09:14" (2/3) ... [2021-12-17 21:09:15,736 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2557817f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:09:15, skipping insertion in model container [2021-12-17 21:09:15,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:09:15" (3/3) ... [2021-12-17 21:09:15,737 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_3.cil+token_ring.10.cil-1.c [2021-12-17 21:09:15,740 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 21:09:15,740 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-17 21:09:15,771 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 21:09:15,776 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 21:09:15,776 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-17 21:09:15,793 INFO L276 IsEmpty]: Start isEmpty. Operand has 457 states, 397 states have (on average 1.6347607052896724) internal successors, (649), 405 states have internal predecessors, (649), 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) [2021-12-17 21:09:15,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 21:09:15,800 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:09:15,800 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:09:15,800 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:09:15,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:09:15,804 INFO L85 PathProgramCache]: Analyzing trace with hash -2009342201, now seen corresponding path program 1 times [2021-12-17 21:09:15,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:09:15,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544302166] [2021-12-17 21:09:15,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:09:15,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:09:15,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:16,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:09:16,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:16,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:09:16,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:16,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:09:16,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:16,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:09:16,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:16,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:09:16,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:16,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:09:16,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:16,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:09:16,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:16,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:09:16,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:09:16,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544302166] [2021-12-17 21:09:16,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544302166] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:09:16,099 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:09:16,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 21:09:16,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505543800] [2021-12-17 21:09:16,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:09:16,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 21:09:16,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:09:16,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 21:09:16,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:09:16,132 INFO L87 Difference]: Start difference. First operand has 457 states, 397 states have (on average 1.6347607052896724) internal successors, (649), 405 states have internal predecessors, (649), 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) [2021-12-17 21:09:17,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:09:17,173 INFO L93 Difference]: Finished difference Result 1038 states and 1657 transitions. [2021-12-17 21:09:17,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 21:09:17,175 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-17 21:09:17,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:09:17,193 INFO L225 Difference]: With dead ends: 1038 [2021-12-17 21:09:17,193 INFO L226 Difference]: Without dead ends: 597 [2021-12-17 21:09:17,200 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 [2021-12-17 21:09:17,204 INFO L933 BasicCegarLoop]: 697 mSDtfsCounter, 1154 mSDsluCounter, 1368 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1161 SdHoareTripleChecker+Valid, 2065 SdHoareTripleChecker+Invalid, 1154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 21:09:17,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1161 Valid, 2065 Invalid, 1154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 21:09:17,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2021-12-17 21:09:17,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 558. [2021-12-17 21:09:17,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 479 states have (on average 1.524008350730689) internal successors, (730), 486 states have internal predecessors, (730), 55 states have call successors, (55), 22 states have call predecessors, (55), 22 states have return successors, (56), 52 states have call predecessors, (56), 51 states have call successors, (56) [2021-12-17 21:09:17,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 841 transitions. [2021-12-17 21:09:17,278 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 841 transitions. Word has length 65 [2021-12-17 21:09:17,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:09:17,278 INFO L470 AbstractCegarLoop]: Abstraction has 558 states and 841 transitions. [2021-12-17 21:09:17,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-17 21:09:17,278 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 841 transitions. [2021-12-17 21:09:17,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 21:09:17,281 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:09:17,281 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:09:17,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 21:09:17,282 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:09:17,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:09:17,282 INFO L85 PathProgramCache]: Analyzing trace with hash -330453561, now seen corresponding path program 1 times [2021-12-17 21:09:17,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:09:17,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695748760] [2021-12-17 21:09:17,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:09:17,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:09:17,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:17,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:09:17,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:17,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:09:17,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:17,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:09:17,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:17,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:09:17,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:17,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:09:17,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:17,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:09:17,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:17,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:09:17,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:17,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:09:17,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:09:17,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695748760] [2021-12-17 21:09:17,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695748760] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:09:17,445 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:09:17,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 21:09:17,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815143861] [2021-12-17 21:09:17,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:09:17,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 21:09:17,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:09:17,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 21:09:17,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:09:17,447 INFO L87 Difference]: Start difference. First operand 558 states and 841 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-17 21:09:18,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:09:18,539 INFO L93 Difference]: Finished difference Result 955 states and 1407 transitions. [2021-12-17 21:09:18,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-17 21:09:18,543 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-17 21:09:18,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:09:18,547 INFO L225 Difference]: With dead ends: 955 [2021-12-17 21:09:18,547 INFO L226 Difference]: Without dead ends: 746 [2021-12-17 21:09:18,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-12-17 21:09:18,549 INFO L933 BasicCegarLoop]: 762 mSDtfsCounter, 1326 mSDsluCounter, 1986 mSDsCounter, 0 mSdLazyCounter, 1351 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1357 SdHoareTripleChecker+Valid, 2748 SdHoareTripleChecker+Invalid, 1488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 1351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 21:09:18,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1357 Valid, 2748 Invalid, 1488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 1351 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 21:09:18,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2021-12-17 21:09:18,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 670. [2021-12-17 21:09:18,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 569 states have (on average 1.5043936731107206) internal successors, (856), 578 states have internal predecessors, (856), 68 states have call successors, (68), 29 states have call predecessors, (68), 31 states have return successors, (77), 66 states have call predecessors, (77), 64 states have call successors, (77) [2021-12-17 21:09:18,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 1001 transitions. [2021-12-17 21:09:18,584 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 1001 transitions. Word has length 65 [2021-12-17 21:09:18,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:09:18,584 INFO L470 AbstractCegarLoop]: Abstraction has 670 states and 1001 transitions. [2021-12-17 21:09:18,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-17 21:09:18,585 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 1001 transitions. [2021-12-17 21:09:18,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-17 21:09:18,587 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:09:18,588 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:09:18,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 21:09:18,588 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:09:18,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:09:18,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1935927625, now seen corresponding path program 1 times [2021-12-17 21:09:18,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:09:18,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866567268] [2021-12-17 21:09:18,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:09:18,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:09:18,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:18,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:09:18,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:18,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:09:18,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:18,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:09:18,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:18,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:09:18,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:18,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:09:18,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:18,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-17 21:09:18,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:18,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-17 21:09:18,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:18,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:09:18,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:09:18,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866567268] [2021-12-17 21:09:18,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866567268] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:09:18,717 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:09:18,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-17 21:09:18,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559985800] [2021-12-17 21:09:18,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:09:18,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 21:09:18,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:09:18,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 21:09:18,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-17 21:09:18,719 INFO L87 Difference]: Start difference. First operand 670 states and 1001 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-17 21:09:20,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:09:20,323 INFO L93 Difference]: Finished difference Result 2216 states and 3199 transitions. [2021-12-17 21:09:20,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-17 21:09:20,335 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), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) Word has length 65 [2021-12-17 21:09:20,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:09:20,343 INFO L225 Difference]: With dead ends: 2216 [2021-12-17 21:09:20,343 INFO L226 Difference]: Without dead ends: 1883 [2021-12-17 21:09:20,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-12-17 21:09:20,346 INFO L933 BasicCegarLoop]: 812 mSDtfsCounter, 3975 mSDsluCounter, 1858 mSDsCounter, 0 mSdLazyCounter, 1680 mSolverCounterSat, 753 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3993 SdHoareTripleChecker+Valid, 2670 SdHoareTripleChecker+Invalid, 2433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 753 IncrementalHoareTripleChecker+Valid, 1680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:09:20,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3993 Valid, 2670 Invalid, 2433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [753 Valid, 1680 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-17 21:09:20,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1883 states. [2021-12-17 21:09:20,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1883 to 1723. [2021-12-17 21:09:20,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1723 states, 1417 states have (on average 1.4114326040931546) internal successors, (2000), 1441 states have internal predecessors, (2000), 178 states have call successors, (178), 112 states have call predecessors, (178), 126 states have return successors, (210), 172 states have call predecessors, (210), 174 states have call successors, (210) [2021-12-17 21:09:20,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1723 states to 1723 states and 2388 transitions. [2021-12-17 21:09:20,434 INFO L78 Accepts]: Start accepts. Automaton has 1723 states and 2388 transitions. Word has length 65 [2021-12-17 21:09:20,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:09:20,434 INFO L470 AbstractCegarLoop]: Abstraction has 1723 states and 2388 transitions. [2021-12-17 21:09:20,435 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), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-17 21:09:20,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1723 states and 2388 transitions. [2021-12-17 21:09:20,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-17 21:09:20,436 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:09:20,437 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:09:20,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 21:09:20,437 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:09:20,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:09:20,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1448069129, now seen corresponding path program 1 times [2021-12-17 21:09:20,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:09:20,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825504557] [2021-12-17 21:09:20,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:09:20,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:09:20,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:20,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:09:20,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:20,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:09:20,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:20,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:09:20,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:20,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:09:20,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:20,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 21:09:20,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:20,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 21:09:20,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:20,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-17 21:09:20,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:20,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:09:20,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:09:20,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825504557] [2021-12-17 21:09:20,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825504557] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:09:20,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:09:20,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 21:09:20,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534060392] [2021-12-17 21:09:20,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:09:20,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 21:09:20,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:09:20,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 21:09:20,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-17 21:09:20,561 INFO L87 Difference]: Start difference. First operand 1723 states and 2388 transitions. Second operand has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 21:09:21,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:09:21,355 INFO L93 Difference]: Finished difference Result 3251 states and 4467 transitions. [2021-12-17 21:09:21,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 21:09:21,355 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 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 66 [2021-12-17 21:09:21,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:09:21,362 INFO L225 Difference]: With dead ends: 3251 [2021-12-17 21:09:21,362 INFO L226 Difference]: Without dead ends: 1871 [2021-12-17 21:09:21,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 21:09:21,366 INFO L933 BasicCegarLoop]: 670 mSDtfsCounter, 875 mSDsluCounter, 2207 mSDsCounter, 0 mSdLazyCounter, 1328 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 876 SdHoareTripleChecker+Valid, 2877 SdHoareTripleChecker+Invalid, 1476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 1328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 21:09:21,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [876 Valid, 2877 Invalid, 1476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 1328 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 21:09:21,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1871 states. [2021-12-17 21:09:21,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1871 to 1763. [2021-12-17 21:09:21,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1763 states, 1449 states have (on average 1.3982056590752243) internal successors, (2026), 1473 states have internal predecessors, (2026), 178 states have call successors, (178), 112 states have call predecessors, (178), 134 states have return successors, (218), 180 states have call predecessors, (218), 174 states have call successors, (218) [2021-12-17 21:09:21,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 2422 transitions. [2021-12-17 21:09:21,432 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 2422 transitions. Word has length 66 [2021-12-17 21:09:21,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:09:21,433 INFO L470 AbstractCegarLoop]: Abstraction has 1763 states and 2422 transitions. [2021-12-17 21:09:21,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.666666666666667) internal successors, (51), 5 states have internal predecessors, (51), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 21:09:21,433 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 2422 transitions. [2021-12-17 21:09:21,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-17 21:09:21,434 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:09:21,434 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:09:21,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 21:09:21,434 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:09:21,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:09:21,434 INFO L85 PathProgramCache]: Analyzing trace with hash 418709831, now seen corresponding path program 1 times [2021-12-17 21:09:21,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:09:21,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045770935] [2021-12-17 21:09:21,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:09:21,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:09:21,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:21,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:09:21,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:21,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:09:21,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:21,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:09:21,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:21,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:09:21,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:21,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 21:09:21,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:21,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-17 21:09:21,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:21,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-17 21:09:21,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:21,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:09:21,518 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:09:21,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045770935] [2021-12-17 21:09:21,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045770935] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:09:21,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:09:21,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-17 21:09:21,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777663674] [2021-12-17 21:09:21,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:09:21,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 21:09:21,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:09:21,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 21:09:21,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-17 21:09:21,519 INFO L87 Difference]: Start difference. First operand 1763 states and 2422 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 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) [2021-12-17 21:09:23,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:09:23,050 INFO L93 Difference]: Finished difference Result 5335 states and 7296 transitions. [2021-12-17 21:09:23,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-17 21:09:23,051 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 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 66 [2021-12-17 21:09:23,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:09:23,059 INFO L225 Difference]: With dead ends: 5335 [2021-12-17 21:09:23,059 INFO L226 Difference]: Without dead ends: 2154 [2021-12-17 21:09:23,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-12-17 21:09:23,069 INFO L933 BasicCegarLoop]: 809 mSDtfsCounter, 3628 mSDsluCounter, 2290 mSDsCounter, 0 mSdLazyCounter, 1748 mSolverCounterSat, 679 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3646 SdHoareTripleChecker+Valid, 3099 SdHoareTripleChecker+Invalid, 2427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 679 IncrementalHoareTripleChecker+Valid, 1748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-17 21:09:23,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3646 Valid, 3099 Invalid, 2427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [679 Valid, 1748 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-17 21:09:23,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2154 states. [2021-12-17 21:09:23,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2154 to 1974. [2021-12-17 21:09:23,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1974 states, 1588 states have (on average 1.3551637279596978) internal successors, (2152), 1614 states have internal predecessors, (2152), 218 states have call successors, (218), 140 states have call predecessors, (218), 166 states have return successors, (264), 222 states have call predecessors, (264), 214 states have call successors, (264) [2021-12-17 21:09:23,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1974 states to 1974 states and 2634 transitions. [2021-12-17 21:09:23,126 INFO L78 Accepts]: Start accepts. Automaton has 1974 states and 2634 transitions. Word has length 66 [2021-12-17 21:09:23,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:09:23,126 INFO L470 AbstractCegarLoop]: Abstraction has 1974 states and 2634 transitions. [2021-12-17 21:09:23,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 7 states have internal predecessors, (51), 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) [2021-12-17 21:09:23,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1974 states and 2634 transitions. [2021-12-17 21:09:23,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-17 21:09:23,129 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:09:23,129 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:09:23,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 21:09:23,130 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:09:23,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:09:23,130 INFO L85 PathProgramCache]: Analyzing trace with hash -440043302, now seen corresponding path program 1 times [2021-12-17 21:09:23,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:09:23,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219765499] [2021-12-17 21:09:23,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:09:23,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:09:23,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:23,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:09:23,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:23,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:09:23,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:23,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:09:23,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:23,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:09:23,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:23,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 21:09:23,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:23,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-17 21:09:23,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:23,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-17 21:09:23,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:23,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 21:09:23,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:23,244 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 21:09:23,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:09:23,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219765499] [2021-12-17 21:09:23,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219765499] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:09:23,253 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:09:23,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 21:09:23,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130708566] [2021-12-17 21:09:23,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:09:23,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 21:09:23,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:09:23,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 21:09:23,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-17 21:09:23,254 INFO L87 Difference]: Start difference. First operand 1974 states and 2634 transitions. Second operand has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 21:09:24,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:09:24,031 INFO L93 Difference]: Finished difference Result 3799 states and 5036 transitions. [2021-12-17 21:09:24,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 21:09:24,031 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 5 states have internal predecessors, (62), 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 91 [2021-12-17 21:09:24,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:09:24,040 INFO L225 Difference]: With dead ends: 3799 [2021-12-17 21:09:24,040 INFO L226 Difference]: Without dead ends: 2168 [2021-12-17 21:09:24,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-12-17 21:09:24,048 INFO L933 BasicCegarLoop]: 659 mSDtfsCounter, 869 mSDsluCounter, 2167 mSDsCounter, 0 mSdLazyCounter, 1312 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 871 SdHoareTripleChecker+Valid, 2826 SdHoareTripleChecker+Invalid, 1463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 1312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-17 21:09:24,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [871 Valid, 2826 Invalid, 1463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 1312 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-17 21:09:24,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2168 states. [2021-12-17 21:09:24,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2168 to 2034. [2021-12-17 21:09:24,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2034 states, 1636 states have (on average 1.341075794621027) internal successors, (2194), 1662 states have internal predecessors, (2194), 218 states have call successors, (218), 140 states have call predecessors, (218), 178 states have return successors, (276), 234 states have call predecessors, (276), 214 states have call successors, (276) [2021-12-17 21:09:24,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2034 states to 2034 states and 2688 transitions. [2021-12-17 21:09:24,144 INFO L78 Accepts]: Start accepts. Automaton has 2034 states and 2688 transitions. Word has length 91 [2021-12-17 21:09:24,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:09:24,146 INFO L470 AbstractCegarLoop]: Abstraction has 2034 states and 2688 transitions. [2021-12-17 21:09:24,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 5 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 21:09:24,147 INFO L276 IsEmpty]: Start isEmpty. Operand 2034 states and 2688 transitions. [2021-12-17 21:09:24,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-17 21:09:24,148 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:09:24,148 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:09:24,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 21:09:24,150 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:09:24,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:09:24,150 INFO L85 PathProgramCache]: Analyzing trace with hash 3857372, now seen corresponding path program 1 times [2021-12-17 21:09:24,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:09:24,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041391639] [2021-12-17 21:09:24,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:09:24,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:09:24,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:24,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:09:24,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:24,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:09:24,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:24,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:09:24,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:24,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:09:24,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:24,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 21:09:24,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:24,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-17 21:09:24,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:24,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-17 21:09:24,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:24,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 21:09:24,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:24,262 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 21:09:24,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:09:24,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041391639] [2021-12-17 21:09:24,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041391639] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:09:24,263 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:09:24,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-17 21:09:24,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569655048] [2021-12-17 21:09:24,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:09:24,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 21:09:24,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:09:24,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 21:09:24,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-17 21:09:24,264 INFO L87 Difference]: Start difference. First operand 2034 states and 2688 transitions. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-17 21:09:25,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:09:25,099 INFO L93 Difference]: Finished difference Result 3561 states and 4652 transitions. [2021-12-17 21:09:25,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-17 21:09:25,099 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 6 states have internal predecessors, (62), 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 91 [2021-12-17 21:09:25,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:09:25,108 INFO L225 Difference]: With dead ends: 3561 [2021-12-17 21:09:25,108 INFO L226 Difference]: Without dead ends: 2108 [2021-12-17 21:09:25,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-12-17 21:09:25,113 INFO L933 BasicCegarLoop]: 693 mSDtfsCounter, 1635 mSDsluCounter, 1393 mSDsCounter, 0 mSdLazyCounter, 1184 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1664 SdHoareTripleChecker+Valid, 2086 SdHoareTripleChecker+Invalid, 1398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 1184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-17 21:09:25,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1664 Valid, 2086 Invalid, 1398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 1184 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-17 21:09:25,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2021-12-17 21:09:25,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 1813. [2021-12-17 21:09:25,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1468 states have (on average 1.3460490463215258) internal successors, (1976), 1489 states have internal predecessors, (1976), 190 states have call successors, (190), 121 states have call predecessors, (190), 153 states have return successors, (236), 204 states have call predecessors, (236), 186 states have call successors, (236) [2021-12-17 21:09:25,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 2402 transitions. [2021-12-17 21:09:25,170 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 2402 transitions. Word has length 91 [2021-12-17 21:09:25,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:09:25,170 INFO L470 AbstractCegarLoop]: Abstraction has 1813 states and 2402 transitions. [2021-12-17 21:09:25,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 6 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-17 21:09:25,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 2402 transitions. [2021-12-17 21:09:25,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-17 21:09:25,172 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:09:25,172 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:09:25,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 21:09:25,173 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:09:25,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:09:25,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1943019418, now seen corresponding path program 1 times [2021-12-17 21:09:25,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:09:25,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153126960] [2021-12-17 21:09:25,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:09:25,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:09:25,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:25,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:09:25,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:25,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:09:25,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:25,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:09:25,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:25,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:09:25,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:25,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 21:09:25,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:25,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-17 21:09:25,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:25,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-17 21:09:25,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:25,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 21:09:25,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:25,249 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 21:09:25,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:09:25,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153126960] [2021-12-17 21:09:25,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153126960] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:09:25,251 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:09:25,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:09:25,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454155508] [2021-12-17 21:09:25,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:09:25,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:09:25,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:09:25,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:09:25,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:09:25,254 INFO L87 Difference]: Start difference. First operand 1813 states and 2402 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-17 21:09:25,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:09:25,628 INFO L93 Difference]: Finished difference Result 4965 states and 6514 transitions. [2021-12-17 21:09:25,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 21:09:25,628 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 91 [2021-12-17 21:09:25,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:09:25,641 INFO L225 Difference]: With dead ends: 4965 [2021-12-17 21:09:25,642 INFO L226 Difference]: Without dead ends: 3496 [2021-12-17 21:09:25,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-12-17 21:09:25,645 INFO L933 BasicCegarLoop]: 694 mSDtfsCounter, 1867 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1899 SdHoareTripleChecker+Valid, 1423 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 245 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 21:09:25,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1899 Valid, 1423 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [245 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 21:09:25,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3496 states. [2021-12-17 21:09:25,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3496 to 3282. [2021-12-17 21:09:25,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3282 states, 2617 states have (on average 1.3007260221627819) internal successors, (3404), 2667 states have internal predecessors, (3404), 351 states have call successors, (351), 234 states have call predecessors, (351), 312 states have return successors, (519), 383 states have call predecessors, (519), 347 states have call successors, (519) [2021-12-17 21:09:25,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3282 states to 3282 states and 4274 transitions. [2021-12-17 21:09:25,751 INFO L78 Accepts]: Start accepts. Automaton has 3282 states and 4274 transitions. Word has length 91 [2021-12-17 21:09:25,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:09:25,751 INFO L470 AbstractCegarLoop]: Abstraction has 3282 states and 4274 transitions. [2021-12-17 21:09:25,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 4 states have internal predecessors, (70), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-17 21:09:25,752 INFO L276 IsEmpty]: Start isEmpty. Operand 3282 states and 4274 transitions. [2021-12-17 21:09:25,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-17 21:09:25,754 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:09:25,755 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:09:25,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 21:09:25,755 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:09:25,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:09:25,756 INFO L85 PathProgramCache]: Analyzing trace with hash 885181340, now seen corresponding path program 1 times [2021-12-17 21:09:25,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:09:25,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826535854] [2021-12-17 21:09:25,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:09:25,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:09:25,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:25,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:09:25,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:25,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:09:25,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:25,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:09:25,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:25,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:09:25,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:25,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 21:09:25,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:25,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-17 21:09:25,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:25,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-17 21:09:25,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:25,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-12-17 21:09:25,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:25,823 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-17 21:09:25,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:09:25,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826535854] [2021-12-17 21:09:25,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826535854] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:09:25,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:09:25,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 21:09:25,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621705567] [2021-12-17 21:09:25,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:09:25,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 21:09:25,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:09:25,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 21:09:25,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 21:09:25,826 INFO L87 Difference]: Start difference. First operand 3282 states and 4274 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-17 21:09:26,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:09:26,251 INFO L93 Difference]: Finished difference Result 4866 states and 6258 transitions. [2021-12-17 21:09:26,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 21:09:26,251 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), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 91 [2021-12-17 21:09:26,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:09:26,258 INFO L225 Difference]: With dead ends: 4866 [2021-12-17 21:09:26,259 INFO L226 Difference]: Without dead ends: 1928 [2021-12-17 21:09:26,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:09:26,264 INFO L933 BasicCegarLoop]: 659 mSDtfsCounter, 698 mSDsluCounter, 1199 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 1858 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 21:09:26,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [712 Valid, 1858 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 21:09:26,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2021-12-17 21:09:26,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1813. [2021-12-17 21:09:26,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1468 states have (on average 1.3208446866485013) internal successors, (1939), 1489 states have internal predecessors, (1939), 190 states have call successors, (190), 121 states have call predecessors, (190), 153 states have return successors, (236), 204 states have call predecessors, (236), 186 states have call successors, (236) [2021-12-17 21:09:26,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 2365 transitions. [2021-12-17 21:09:26,318 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 2365 transitions. Word has length 91 [2021-12-17 21:09:26,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:09:26,318 INFO L470 AbstractCegarLoop]: Abstraction has 1813 states and 2365 transitions. [2021-12-17 21:09:26,318 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), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-17 21:09:26,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 2365 transitions. [2021-12-17 21:09:26,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-17 21:09:26,320 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:09:26,320 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-17 21:09:26,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 21:09:26,320 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:09:26,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:09:26,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1161498813, now seen corresponding path program 1 times [2021-12-17 21:09:26,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:09:26,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228424472] [2021-12-17 21:09:26,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:09:26,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:09:26,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:26,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:09:26,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:26,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:09:26,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:26,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:09:26,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:26,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:09:26,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:26,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 21:09:26,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:26,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-17 21:09:26,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:26,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-17 21:09:26,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:26,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-17 21:09:26,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:26,409 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 21:09:26,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:09:26,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228424472] [2021-12-17 21:09:26,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228424472] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:09:26,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:09:26,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-17 21:09:26,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797317561] [2021-12-17 21:09:26,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:09:26,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 21:09:26,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:09:26,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 21:09:26,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-17 21:09:26,412 INFO L87 Difference]: Start difference. First operand 1813 states and 2365 transitions. Second operand has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-17 21:09:27,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:09:27,589 INFO L93 Difference]: Finished difference Result 4231 states and 5448 transitions. [2021-12-17 21:09:27,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-12-17 21:09:27,590 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 92 [2021-12-17 21:09:27,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:09:27,599 INFO L225 Difference]: With dead ends: 4231 [2021-12-17 21:09:27,599 INFO L226 Difference]: Without dead ends: 2611 [2021-12-17 21:09:27,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=720, Unknown=0, NotChecked=0, Total=930 [2021-12-17 21:09:27,604 INFO L933 BasicCegarLoop]: 729 mSDtfsCounter, 2341 mSDsluCounter, 1733 mSDsCounter, 0 mSdLazyCounter, 1403 mSolverCounterSat, 483 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2382 SdHoareTripleChecker+Valid, 2462 SdHoareTripleChecker+Invalid, 1886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 483 IncrementalHoareTripleChecker+Valid, 1403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 21:09:27,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2382 Valid, 2462 Invalid, 1886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [483 Valid, 1403 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 21:09:27,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2611 states. [2021-12-17 21:09:27,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2611 to 2434. [2021-12-17 21:09:27,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2434 states, 1935 states have (on average 1.2821705426356589) internal successors, (2481), 1964 states have internal predecessors, (2481), 267 states have call successors, (267), 169 states have call predecessors, (267), 230 states have return successors, (367), 302 states have call predecessors, (367), 263 states have call successors, (367) [2021-12-17 21:09:27,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2434 states to 2434 states and 3115 transitions. [2021-12-17 21:09:27,706 INFO L78 Accepts]: Start accepts. Automaton has 2434 states and 3115 transitions. Word has length 92 [2021-12-17 21:09:27,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:09:27,707 INFO L470 AbstractCegarLoop]: Abstraction has 2434 states and 3115 transitions. [2021-12-17 21:09:27,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-17 21:09:27,707 INFO L276 IsEmpty]: Start isEmpty. Operand 2434 states and 3115 transitions. [2021-12-17 21:09:27,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-12-17 21:09:27,708 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:09:27,709 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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, 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] [2021-12-17 21:09:27,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 21:09:27,709 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:09:27,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:09:27,710 INFO L85 PathProgramCache]: Analyzing trace with hash 173734590, now seen corresponding path program 1 times [2021-12-17 21:09:27,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:09:27,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520577486] [2021-12-17 21:09:27,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:09:27,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:09:27,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:27,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:09:27,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:27,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-17 21:09:27,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:27,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-17 21:09:27,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:27,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:09:27,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:27,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-17 21:09:27,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:27,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-17 21:09:27,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:27,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-17 21:09:27,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:27,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-12-17 21:09:27,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:27,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-17 21:09:27,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:27,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-12-17 21:09:27,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:27,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-17 21:09:27,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:27,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-17 21:09:27,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:27,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-17 21:09:27,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:27,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-17 21:09:27,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:27,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-17 21:09:27,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:27,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-17 21:09:27,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:27,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2021-12-17 21:09:27,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:27,828 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 23 proven. 9 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-12-17 21:09:27,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:09:27,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520577486] [2021-12-17 21:09:27,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520577486] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 21:09:27,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340414619] [2021-12-17 21:09:27,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:09:27,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 21:09:27,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 21:09:27,842 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 21:09:27,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 21:09:27,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:28,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 612 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 21:09:28,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 21:09:28,253 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-17 21:09:28,253 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 21:09:28,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340414619] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:09:28,253 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 21:09:28,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 11 [2021-12-17 21:09:28,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340986678] [2021-12-17 21:09:28,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:09:28,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 21:09:28,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:09:28,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 21:09:28,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:09:28,255 INFO L87 Difference]: Start difference. First operand 2434 states and 3115 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-17 21:09:28,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:09:28,375 INFO L93 Difference]: Finished difference Result 6360 states and 7944 transitions. [2021-12-17 21:09:28,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 21:09:28,376 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) Word has length 163 [2021-12-17 21:09:28,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:09:28,391 INFO L225 Difference]: With dead ends: 6360 [2021-12-17 21:09:28,391 INFO L226 Difference]: Without dead ends: 4346 [2021-12-17 21:09:28,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-12-17 21:09:28,396 INFO L933 BasicCegarLoop]: 682 mSDtfsCounter, 61 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 1331 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:09:28,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 1331 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 21:09:28,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4346 states. [2021-12-17 21:09:28,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4346 to 4304. [2021-12-17 21:09:28,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4304 states, 3392 states have (on average 1.2485259433962264) internal successors, (4235), 3444 states have internal predecessors, (4235), 474 states have call successors, (474), 330 states have call predecessors, (474), 436 states have return successors, (635), 531 states have call predecessors, (635), 470 states have call successors, (635) [2021-12-17 21:09:28,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4304 states to 4304 states and 5344 transitions. [2021-12-17 21:09:28,547 INFO L78 Accepts]: Start accepts. Automaton has 4304 states and 5344 transitions. Word has length 163 [2021-12-17 21:09:28,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:09:28,547 INFO L470 AbstractCegarLoop]: Abstraction has 4304 states and 5344 transitions. [2021-12-17 21:09:28,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 2 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 2 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-17 21:09:28,547 INFO L276 IsEmpty]: Start isEmpty. Operand 4304 states and 5344 transitions. [2021-12-17 21:09:28,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-17 21:09:28,549 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:09:28,549 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] [2021-12-17 21:09:28,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 21:09:28,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-17 21:09:28,764 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:09:28,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:09:28,764 INFO L85 PathProgramCache]: Analyzing trace with hash 2058139820, now seen corresponding path program 1 times [2021-12-17 21:09:28,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:09:28,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050985896] [2021-12-17 21:09:28,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:09:28,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:09:28,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:28,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:09:28,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:28,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 21:09:28,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:28,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 21:09:28,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:28,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-17 21:09:28,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:28,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-17 21:09:28,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:28,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:09:28,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:09:28,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050985896] [2021-12-17 21:09:28,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050985896] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:09:28,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:09:28,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 21:09:28,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28258743] [2021-12-17 21:09:28,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:09:28,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 21:09:28,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:09:28,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 21:09:28,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 21:09:28,885 INFO L87 Difference]: Start difference. First operand 4304 states and 5344 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 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) [2021-12-17 21:09:30,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:09:30,217 INFO L93 Difference]: Finished difference Result 4751 states and 6066 transitions. [2021-12-17 21:09:30,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:09:30,218 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 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 157 [2021-12-17 21:09:30,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:09:30,237 INFO L225 Difference]: With dead ends: 4751 [2021-12-17 21:09:30,237 INFO L226 Difference]: Without dead ends: 4424 [2021-12-17 21:09:30,240 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 [2021-12-17 21:09:30,241 INFO L933 BasicCegarLoop]: 719 mSDtfsCounter, 1003 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1025 SdHoareTripleChecker+Valid, 1300 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 21:09:30,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1025 Valid, 1300 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 21:09:30,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4424 states. [2021-12-17 21:09:30,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4424 to 4304. [2021-12-17 21:09:30,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4304 states, 3392 states have (on average 1.2482311320754718) internal successors, (4234), 3444 states have internal predecessors, (4234), 474 states have call successors, (474), 330 states have call predecessors, (474), 436 states have return successors, (635), 531 states have call predecessors, (635), 470 states have call successors, (635) [2021-12-17 21:09:30,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4304 states to 4304 states and 5343 transitions. [2021-12-17 21:09:30,446 INFO L78 Accepts]: Start accepts. Automaton has 4304 states and 5343 transitions. Word has length 157 [2021-12-17 21:09:30,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:09:30,446 INFO L470 AbstractCegarLoop]: Abstraction has 4304 states and 5343 transitions. [2021-12-17 21:09:30,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 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) [2021-12-17 21:09:30,447 INFO L276 IsEmpty]: Start isEmpty. Operand 4304 states and 5343 transitions. [2021-12-17 21:09:30,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-17 21:09:30,460 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:09:30,460 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] [2021-12-17 21:09:30,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 21:09:30,461 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:09:30,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:09:30,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1972179986, now seen corresponding path program 1 times [2021-12-17 21:09:30,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:09:30,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109288167] [2021-12-17 21:09:30,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:09:30,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:09:30,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:30,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:09:30,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:30,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 21:09:30,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:30,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 21:09:30,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:30,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-17 21:09:30,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:30,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-17 21:09:30,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:30,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:09:30,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:09:30,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109288167] [2021-12-17 21:09:30,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109288167] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:09:30,565 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:09:30,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 21:09:30,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065087152] [2021-12-17 21:09:30,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:09:30,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 21:09:30,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:09:30,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 21:09:30,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 21:09:30,567 INFO L87 Difference]: Start difference. First operand 4304 states and 5343 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 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) [2021-12-17 21:09:31,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:09:31,711 INFO L93 Difference]: Finished difference Result 4743 states and 6049 transitions. [2021-12-17 21:09:31,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:09:31,711 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 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 157 [2021-12-17 21:09:31,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:09:31,722 INFO L225 Difference]: With dead ends: 4743 [2021-12-17 21:09:31,723 INFO L226 Difference]: Without dead ends: 4424 [2021-12-17 21:09:31,724 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 [2021-12-17 21:09:31,725 INFO L933 BasicCegarLoop]: 718 mSDtfsCounter, 994 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1016 SdHoareTripleChecker+Valid, 1298 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-17 21:09:31,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1016 Valid, 1298 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-17 21:09:31,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4424 states. [2021-12-17 21:09:31,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4424 to 4304. [2021-12-17 21:09:31,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4304 states, 3392 states have (on average 1.247936320754717) internal successors, (4233), 3444 states have internal predecessors, (4233), 474 states have call successors, (474), 330 states have call predecessors, (474), 436 states have return successors, (635), 531 states have call predecessors, (635), 470 states have call successors, (635) [2021-12-17 21:09:31,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4304 states to 4304 states and 5342 transitions. [2021-12-17 21:09:31,952 INFO L78 Accepts]: Start accepts. Automaton has 4304 states and 5342 transitions. Word has length 157 [2021-12-17 21:09:31,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:09:31,952 INFO L470 AbstractCegarLoop]: Abstraction has 4304 states and 5342 transitions. [2021-12-17 21:09:31,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 3 states have internal predecessors, (146), 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) [2021-12-17 21:09:31,953 INFO L276 IsEmpty]: Start isEmpty. Operand 4304 states and 5342 transitions. [2021-12-17 21:09:31,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-17 21:09:31,954 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:09:31,955 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] [2021-12-17 21:09:31,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 21:09:31,955 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:09:31,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:09:31,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1912176944, now seen corresponding path program 1 times [2021-12-17 21:09:31,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:09:31,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681433879] [2021-12-17 21:09:31,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:09:31,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:09:31,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:31,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:09:31,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:32,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 21:09:32,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:32,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 21:09:32,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:32,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-17 21:09:32,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:32,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-17 21:09:32,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:32,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:09:32,047 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:09:32,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681433879] [2021-12-17 21:09:32,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681433879] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:09:32,048 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:09:32,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 21:09:32,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659003039] [2021-12-17 21:09:32,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:09:32,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 21:09:32,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:09:32,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 21:09:32,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 21:09:32,050 INFO L87 Difference]: Start difference. First operand 4304 states and 5342 transitions. Second operand has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:09:34,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:09:34,095 INFO L93 Difference]: Finished difference Result 5190 states and 6773 transitions. [2021-12-17 21:09:34,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 21:09:34,096 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 4 states have internal predecessors, (146), 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 157 [2021-12-17 21:09:34,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:09:34,118 INFO L225 Difference]: With dead ends: 5190 [2021-12-17 21:09:34,118 INFO L226 Difference]: Without dead ends: 4874 [2021-12-17 21:09:34,121 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 [2021-12-17 21:09:34,121 INFO L933 BasicCegarLoop]: 748 mSDtfsCounter, 1579 mSDsluCounter, 1090 mSDsCounter, 0 mSdLazyCounter, 1788 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1608 SdHoareTripleChecker+Valid, 1838 SdHoareTripleChecker+Invalid, 1947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 1788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-17 21:09:34,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1608 Valid, 1838 Invalid, 1947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 1788 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-17 21:09:34,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4874 states. [2021-12-17 21:09:34,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4874 to 4633. [2021-12-17 21:09:34,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4633 states, 3695 states have (on average 1.2765899864682002) internal successors, (4717), 3748 states have internal predecessors, (4717), 493 states have call successors, (493), 336 states have call predecessors, (493), 443 states have return successors, (657), 550 states have call predecessors, (657), 489 states have call successors, (657) [2021-12-17 21:09:34,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4633 states to 4633 states and 5867 transitions. [2021-12-17 21:09:34,339 INFO L78 Accepts]: Start accepts. Automaton has 4633 states and 5867 transitions. Word has length 157 [2021-12-17 21:09:34,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:09:34,339 INFO L470 AbstractCegarLoop]: Abstraction has 4633 states and 5867 transitions. [2021-12-17 21:09:34,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:09:34,340 INFO L276 IsEmpty]: Start isEmpty. Operand 4633 states and 5867 transitions. [2021-12-17 21:09:34,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-17 21:09:34,342 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:09:34,342 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 21:09:34,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 21:09:34,342 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:09:34,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:09:34,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1716755156, now seen corresponding path program 1 times [2021-12-17 21:09:34,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:09:34,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651858733] [2021-12-17 21:09:34,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:09:34,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:09:34,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:34,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:09:34,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:34,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 21:09:34,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:34,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 21:09:34,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:34,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-17 21:09:34,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:34,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-17 21:09:34,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:34,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:09:34,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:09:34,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651858733] [2021-12-17 21:09:34,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651858733] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:09:34,454 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:09:34,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:09:34,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756797859] [2021-12-17 21:09:34,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:09:34,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:09:34,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:09:34,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:09:34,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:09:34,457 INFO L87 Difference]: Start difference. First operand 4633 states and 5867 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:09:36,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:09:36,175 INFO L93 Difference]: Finished difference Result 5535 states and 7332 transitions. [2021-12-17 21:09:36,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:09:36,175 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2021-12-17 21:09:36,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:09:36,184 INFO L225 Difference]: With dead ends: 5535 [2021-12-17 21:09:36,184 INFO L226 Difference]: Without dead ends: 4890 [2021-12-17 21:09:36,189 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 [2021-12-17 21:09:36,190 INFO L933 BasicCegarLoop]: 656 mSDtfsCounter, 1284 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 1353 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1314 SdHoareTripleChecker+Valid, 1732 SdHoareTripleChecker+Invalid, 1474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-17 21:09:36,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1314 Valid, 1732 Invalid, 1474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1353 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-17 21:09:36,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4890 states. [2021-12-17 21:09:36,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4890 to 4633. [2021-12-17 21:09:36,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4633 states, 3695 states have (on average 1.2760487144790258) internal successors, (4715), 3748 states have internal predecessors, (4715), 493 states have call successors, (493), 336 states have call predecessors, (493), 443 states have return successors, (657), 550 states have call predecessors, (657), 489 states have call successors, (657) [2021-12-17 21:09:36,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4633 states to 4633 states and 5865 transitions. [2021-12-17 21:09:36,379 INFO L78 Accepts]: Start accepts. Automaton has 4633 states and 5865 transitions. Word has length 157 [2021-12-17 21:09:36,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:09:36,379 INFO L470 AbstractCegarLoop]: Abstraction has 4633 states and 5865 transitions. [2021-12-17 21:09:36,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:09:36,380 INFO L276 IsEmpty]: Start isEmpty. Operand 4633 states and 5865 transitions. [2021-12-17 21:09:36,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-17 21:09:36,381 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:09:36,382 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] [2021-12-17 21:09:36,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 21:09:36,382 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:09:36,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:09:36,382 INFO L85 PathProgramCache]: Analyzing trace with hash -317801554, now seen corresponding path program 1 times [2021-12-17 21:09:36,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:09:36,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579990448] [2021-12-17 21:09:36,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:09:36,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:09:36,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:36,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:09:36,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:36,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 21:09:36,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:36,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 21:09:36,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:36,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-17 21:09:36,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:36,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-17 21:09:36,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:36,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:09:36,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:09:36,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579990448] [2021-12-17 21:09:36,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579990448] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:09:36,483 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:09:36,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:09:36,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852478207] [2021-12-17 21:09:36,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:09:36,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:09:36,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:09:36,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:09:36,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:09:36,484 INFO L87 Difference]: Start difference. First operand 4633 states and 5865 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:09:37,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:09:37,820 INFO L93 Difference]: Finished difference Result 5533 states and 7323 transitions. [2021-12-17 21:09:37,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:09:37,820 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2021-12-17 21:09:37,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:09:37,830 INFO L225 Difference]: With dead ends: 5533 [2021-12-17 21:09:37,830 INFO L226 Difference]: Without dead ends: 4888 [2021-12-17 21:09:37,832 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 [2021-12-17 21:09:37,832 INFO L933 BasicCegarLoop]: 693 mSDtfsCounter, 1404 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 1262 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1434 SdHoareTripleChecker+Valid, 1535 SdHoareTripleChecker+Invalid, 1426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 1262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:09:37,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1434 Valid, 1535 Invalid, 1426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 1262 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 21:09:37,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4888 states. [2021-12-17 21:09:38,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4888 to 4633. [2021-12-17 21:09:38,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4633 states, 3695 states have (on average 1.2755074424898512) internal successors, (4713), 3748 states have internal predecessors, (4713), 493 states have call successors, (493), 336 states have call predecessors, (493), 443 states have return successors, (657), 550 states have call predecessors, (657), 489 states have call successors, (657) [2021-12-17 21:09:38,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4633 states to 4633 states and 5863 transitions. [2021-12-17 21:09:38,015 INFO L78 Accepts]: Start accepts. Automaton has 4633 states and 5863 transitions. Word has length 157 [2021-12-17 21:09:38,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:09:38,015 INFO L470 AbstractCegarLoop]: Abstraction has 4633 states and 5863 transitions. [2021-12-17 21:09:38,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:09:38,015 INFO L276 IsEmpty]: Start isEmpty. Operand 4633 states and 5863 transitions. [2021-12-17 21:09:38,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-17 21:09:38,018 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:09:38,018 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] [2021-12-17 21:09:38,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-17 21:09:38,018 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:09:38,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:09:38,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1935242004, now seen corresponding path program 1 times [2021-12-17 21:09:38,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:09:38,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698484052] [2021-12-17 21:09:38,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:09:38,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:09:38,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:38,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:09:38,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:38,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 21:09:38,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:38,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 21:09:38,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:38,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-17 21:09:38,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:38,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-17 21:09:38,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:38,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:09:38,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:09:38,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698484052] [2021-12-17 21:09:38,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698484052] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:09:38,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:09:38,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:09:38,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456980108] [2021-12-17 21:09:38,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:09:38,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:09:38,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:09:38,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:09:38,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:09:38,116 INFO L87 Difference]: Start difference. First operand 4633 states and 5863 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:09:40,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:09:40,739 INFO L93 Difference]: Finished difference Result 5974 states and 8019 transitions. [2021-12-17 21:09:40,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 21:09:40,740 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2021-12-17 21:09:40,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:09:40,762 INFO L225 Difference]: With dead ends: 5974 [2021-12-17 21:09:40,762 INFO L226 Difference]: Without dead ends: 5329 [2021-12-17 21:09:40,766 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 [2021-12-17 21:09:40,767 INFO L933 BasicCegarLoop]: 1005 mSDtfsCounter, 1580 mSDsluCounter, 1997 mSDsCounter, 0 mSdLazyCounter, 2798 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1609 SdHoareTripleChecker+Valid, 3002 SdHoareTripleChecker+Invalid, 2916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 2798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:09:40,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1609 Valid, 3002 Invalid, 2916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 2798 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-17 21:09:40,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5329 states. [2021-12-17 21:09:40,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5329 to 4939. [2021-12-17 21:09:40,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4939 states, 3975 states have (on average 1.2953459119496855) internal successors, (5149), 4029 states have internal predecessors, (5149), 512 states have call successors, (512), 342 states have call predecessors, (512), 450 states have return successors, (678), 570 states have call predecessors, (678), 508 states have call successors, (678) [2021-12-17 21:09:41,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4939 states to 4939 states and 6339 transitions. [2021-12-17 21:09:41,004 INFO L78 Accepts]: Start accepts. Automaton has 4939 states and 6339 transitions. Word has length 157 [2021-12-17 21:09:41,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:09:41,004 INFO L470 AbstractCegarLoop]: Abstraction has 4939 states and 6339 transitions. [2021-12-17 21:09:41,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:09:41,004 INFO L276 IsEmpty]: Start isEmpty. Operand 4939 states and 6339 transitions. [2021-12-17 21:09:41,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-17 21:09:41,006 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:09:41,006 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] [2021-12-17 21:09:41,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-17 21:09:41,007 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:09:41,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:09:41,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1571775506, now seen corresponding path program 1 times [2021-12-17 21:09:41,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:09:41,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596327404] [2021-12-17 21:09:41,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:09:41,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:09:41,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:41,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:09:41,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:41,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 21:09:41,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:41,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 21:09:41,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:41,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-17 21:09:41,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:41,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-17 21:09:41,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:41,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:09:41,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:09:41,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596327404] [2021-12-17 21:09:41,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596327404] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:09:41,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:09:41,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:09:41,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563472769] [2021-12-17 21:09:41,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:09:41,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:09:41,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:09:41,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:09:41,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:09:41,122 INFO L87 Difference]: Start difference. First operand 4939 states and 6339 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:09:42,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:09:42,606 INFO L93 Difference]: Finished difference Result 6293 states and 8529 transitions. [2021-12-17 21:09:42,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:09:42,607 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2021-12-17 21:09:42,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:09:42,616 INFO L225 Difference]: With dead ends: 6293 [2021-12-17 21:09:42,616 INFO L226 Difference]: Without dead ends: 5342 [2021-12-17 21:09:42,619 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 [2021-12-17 21:09:42,619 INFO L933 BasicCegarLoop]: 684 mSDtfsCounter, 1203 mSDsluCounter, 1077 mSDsCounter, 0 mSdLazyCounter, 1402 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1233 SdHoareTripleChecker+Valid, 1761 SdHoareTripleChecker+Invalid, 1527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-17 21:09:42,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1233 Valid, 1761 Invalid, 1527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1402 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-17 21:09:42,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5342 states. [2021-12-17 21:09:42,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5342 to 4939. [2021-12-17 21:09:42,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4939 states, 3975 states have (on average 1.2945911949685533) internal successors, (5146), 4029 states have internal predecessors, (5146), 512 states have call successors, (512), 342 states have call predecessors, (512), 450 states have return successors, (678), 570 states have call predecessors, (678), 508 states have call successors, (678) [2021-12-17 21:09:42,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4939 states to 4939 states and 6336 transitions. [2021-12-17 21:09:42,848 INFO L78 Accepts]: Start accepts. Automaton has 4939 states and 6336 transitions. Word has length 157 [2021-12-17 21:09:42,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:09:42,848 INFO L470 AbstractCegarLoop]: Abstraction has 4939 states and 6336 transitions. [2021-12-17 21:09:42,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:09:42,848 INFO L276 IsEmpty]: Start isEmpty. Operand 4939 states and 6336 transitions. [2021-12-17 21:09:42,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-17 21:09:42,850 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:09:42,850 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] [2021-12-17 21:09:42,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-17 21:09:42,850 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:09:42,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:09:42,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1282956116, now seen corresponding path program 1 times [2021-12-17 21:09:42,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:09:42,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770833747] [2021-12-17 21:09:42,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:09:42,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:09:42,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:42,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:09:42,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:42,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 21:09:42,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:42,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 21:09:42,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:42,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-17 21:09:42,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:42,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-17 21:09:42,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:42,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:09:42,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:09:42,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770833747] [2021-12-17 21:09:42,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770833747] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:09:42,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:09:42,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:09:42,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707043176] [2021-12-17 21:09:42,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:09:42,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:09:42,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:09:42,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:09:42,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:09:42,955 INFO L87 Difference]: Start difference. First operand 4939 states and 6336 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:09:44,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:09:44,426 INFO L93 Difference]: Finished difference Result 6288 states and 8511 transitions. [2021-12-17 21:09:44,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:09:44,427 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2021-12-17 21:09:44,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:09:44,438 INFO L225 Difference]: With dead ends: 6288 [2021-12-17 21:09:44,438 INFO L226 Difference]: Without dead ends: 5337 [2021-12-17 21:09:44,443 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 [2021-12-17 21:09:44,443 INFO L933 BasicCegarLoop]: 678 mSDtfsCounter, 1203 mSDsluCounter, 1077 mSDsCounter, 0 mSdLazyCounter, 1387 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1233 SdHoareTripleChecker+Valid, 1755 SdHoareTripleChecker+Invalid, 1515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-17 21:09:44,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1233 Valid, 1755 Invalid, 1515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1387 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-17 21:09:44,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5337 states. [2021-12-17 21:09:44,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5337 to 4939. [2021-12-17 21:09:44,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4939 states, 3975 states have (on average 1.2938364779874214) internal successors, (5143), 4029 states have internal predecessors, (5143), 512 states have call successors, (512), 342 states have call predecessors, (512), 450 states have return successors, (678), 570 states have call predecessors, (678), 508 states have call successors, (678) [2021-12-17 21:09:44,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4939 states to 4939 states and 6333 transitions. [2021-12-17 21:09:44,723 INFO L78 Accepts]: Start accepts. Automaton has 4939 states and 6333 transitions. Word has length 157 [2021-12-17 21:09:44,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:09:44,723 INFO L470 AbstractCegarLoop]: Abstraction has 4939 states and 6333 transitions. [2021-12-17 21:09:44,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:09:44,723 INFO L276 IsEmpty]: Start isEmpty. Operand 4939 states and 6333 transitions. [2021-12-17 21:09:44,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-17 21:09:44,725 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:09:44,725 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] [2021-12-17 21:09:44,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-17 21:09:44,725 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:09:44,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:09:44,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1827828690, now seen corresponding path program 1 times [2021-12-17 21:09:44,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:09:44,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132548711] [2021-12-17 21:09:44,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:09:44,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:09:44,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:44,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:09:44,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:44,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 21:09:44,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:44,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 21:09:44,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:44,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-17 21:09:44,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:44,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-17 21:09:44,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:44,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:09:44,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:09:44,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132548711] [2021-12-17 21:09:44,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132548711] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:09:44,819 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:09:44,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:09:44,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076610622] [2021-12-17 21:09:44,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:09:44,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:09:44,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:09:44,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:09:44,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:09:44,820 INFO L87 Difference]: Start difference. First operand 4939 states and 6333 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:09:47,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:09:47,285 INFO L93 Difference]: Finished difference Result 7121 states and 9813 transitions. [2021-12-17 21:09:47,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 21:09:47,286 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2021-12-17 21:09:47,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:09:47,311 INFO L225 Difference]: With dead ends: 7121 [2021-12-17 21:09:47,312 INFO L226 Difference]: Without dead ends: 6170 [2021-12-17 21:09:47,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-17 21:09:47,320 INFO L933 BasicCegarLoop]: 979 mSDtfsCounter, 1563 mSDsluCounter, 1993 mSDsCounter, 0 mSdLazyCounter, 2742 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1592 SdHoareTripleChecker+Valid, 2972 SdHoareTripleChecker+Invalid, 2867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 2742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-17 21:09:47,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1592 Valid, 2972 Invalid, 2867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 2742 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-17 21:09:47,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6170 states. [2021-12-17 21:09:47,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6170 to 5560. [2021-12-17 21:09:47,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5560 states, 4544 states have (on average 1.326144366197183) internal successors, (6026), 4600 states have internal predecessors, (6026), 550 states have call successors, (550), 354 states have call predecessors, (550), 464 states have return successors, (724), 610 states have call predecessors, (724), 546 states have call successors, (724) [2021-12-17 21:09:47,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5560 states to 5560 states and 7300 transitions. [2021-12-17 21:09:47,634 INFO L78 Accepts]: Start accepts. Automaton has 5560 states and 7300 transitions. Word has length 157 [2021-12-17 21:09:47,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:09:47,635 INFO L470 AbstractCegarLoop]: Abstraction has 5560 states and 7300 transitions. [2021-12-17 21:09:47,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:09:47,635 INFO L276 IsEmpty]: Start isEmpty. Operand 5560 states and 7300 transitions. [2021-12-17 21:09:47,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-17 21:09:47,637 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:09:47,637 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] [2021-12-17 21:09:47,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-17 21:09:47,638 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:09:47,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:09:47,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1519086640, now seen corresponding path program 1 times [2021-12-17 21:09:47,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:09:47,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63446155] [2021-12-17 21:09:47,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:09:47,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:09:47,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:47,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:09:47,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:47,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 21:09:47,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:47,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 21:09:47,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:47,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-17 21:09:47,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:47,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-17 21:09:47,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:47,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:09:47,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:09:47,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63446155] [2021-12-17 21:09:47,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63446155] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:09:47,727 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:09:47,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:09:47,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171746845] [2021-12-17 21:09:47,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:09:47,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:09:47,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:09:47,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:09:47,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:09:47,729 INFO L87 Difference]: Start difference. First operand 5560 states and 7300 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:09:50,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:09:50,408 INFO L93 Difference]: Finished difference Result 9362 states and 13336 transitions. [2021-12-17 21:09:50,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 21:09:50,409 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2021-12-17 21:09:50,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:09:50,429 INFO L225 Difference]: With dead ends: 9362 [2021-12-17 21:09:50,429 INFO L226 Difference]: Without dead ends: 7790 [2021-12-17 21:09:50,435 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 [2021-12-17 21:09:50,436 INFO L933 BasicCegarLoop]: 974 mSDtfsCounter, 1562 mSDsluCounter, 1993 mSDsCounter, 0 mSdLazyCounter, 2734 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1591 SdHoareTripleChecker+Valid, 2967 SdHoareTripleChecker+Invalid, 2859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 2734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-17 21:09:50,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1591 Valid, 2967 Invalid, 2859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 2734 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-17 21:09:50,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7790 states. [2021-12-17 21:09:50,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7790 to 6799. [2021-12-17 21:09:50,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6799 states, 5679 states have (on average 1.3706638492692376) internal successors, (7784), 5739 states have internal predecessors, (7784), 626 states have call successors, (626), 378 states have call predecessors, (626), 492 states have return successors, (822), 690 states have call predecessors, (822), 622 states have call successors, (822) [2021-12-17 21:09:50,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6799 states to 6799 states and 9232 transitions. [2021-12-17 21:09:50,806 INFO L78 Accepts]: Start accepts. Automaton has 6799 states and 9232 transitions. Word has length 157 [2021-12-17 21:09:50,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:09:50,806 INFO L470 AbstractCegarLoop]: Abstraction has 6799 states and 9232 transitions. [2021-12-17 21:09:50,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:09:50,807 INFO L276 IsEmpty]: Start isEmpty. Operand 6799 states and 9232 transitions. [2021-12-17 21:09:50,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-17 21:09:50,809 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:09:50,810 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] [2021-12-17 21:09:50,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-17 21:09:50,810 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:09:50,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:09:50,810 INFO L85 PathProgramCache]: Analyzing trace with hash 934314990, now seen corresponding path program 1 times [2021-12-17 21:09:50,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:09:50,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551742301] [2021-12-17 21:09:50,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:09:50,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:09:50,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:50,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:09:50,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:50,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 21:09:50,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:50,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 21:09:50,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:50,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-17 21:09:50,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:50,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-17 21:09:50,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:50,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:09:50,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:09:50,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551742301] [2021-12-17 21:09:50,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551742301] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:09:50,902 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:09:50,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:09:50,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982221033] [2021-12-17 21:09:50,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:09:50,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:09:50,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:09:50,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:09:50,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:09:50,904 INFO L87 Difference]: Start difference. First operand 6799 states and 9232 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:09:52,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:09:52,394 INFO L93 Difference]: Finished difference Result 10612 states and 15317 transitions. [2021-12-17 21:09:52,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:09:52,395 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2021-12-17 21:09:52,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:09:52,411 INFO L225 Difference]: With dead ends: 10612 [2021-12-17 21:09:52,411 INFO L226 Difference]: Without dead ends: 7801 [2021-12-17 21:09:52,420 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 [2021-12-17 21:09:52,421 INFO L933 BasicCegarLoop]: 640 mSDtfsCounter, 1252 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 1302 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1282 SdHoareTripleChecker+Valid, 1716 SdHoareTripleChecker+Invalid, 1431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 1302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:09:52,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1282 Valid, 1716 Invalid, 1431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 1302 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 21:09:52,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7801 states. [2021-12-17 21:09:52,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7801 to 6799. [2021-12-17 21:09:52,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6799 states, 5679 states have (on average 1.3690790632153549) internal successors, (7775), 5739 states have internal predecessors, (7775), 626 states have call successors, (626), 378 states have call predecessors, (626), 492 states have return successors, (822), 690 states have call predecessors, (822), 622 states have call successors, (822) [2021-12-17 21:09:52,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6799 states to 6799 states and 9223 transitions. [2021-12-17 21:09:52,761 INFO L78 Accepts]: Start accepts. Automaton has 6799 states and 9223 transitions. Word has length 157 [2021-12-17 21:09:52,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:09:52,762 INFO L470 AbstractCegarLoop]: Abstraction has 6799 states and 9223 transitions. [2021-12-17 21:09:52,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:09:52,762 INFO L276 IsEmpty]: Start isEmpty. Operand 6799 states and 9223 transitions. [2021-12-17 21:09:52,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-17 21:09:52,765 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:09:52,765 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] [2021-12-17 21:09:52,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-17 21:09:52,765 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:09:52,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:09:52,766 INFO L85 PathProgramCache]: Analyzing trace with hash 499809392, now seen corresponding path program 1 times [2021-12-17 21:09:52,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:09:52,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363086449] [2021-12-17 21:09:52,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:09:52,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:09:52,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:52,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:09:52,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:52,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 21:09:52,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:52,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 21:09:52,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:52,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-17 21:09:52,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:52,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-17 21:09:52,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:52,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:09:52,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:09:52,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363086449] [2021-12-17 21:09:52,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363086449] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:09:52,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:09:52,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:09:52,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018782867] [2021-12-17 21:09:52,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:09:52,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:09:52,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:09:52,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:09:52,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:09:52,862 INFO L87 Difference]: Start difference. First operand 6799 states and 9223 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:09:55,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:09:55,797 INFO L93 Difference]: Finished difference Result 13829 states and 20326 transitions. [2021-12-17 21:09:55,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 21:09:55,798 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2021-12-17 21:09:55,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:09:55,824 INFO L225 Difference]: With dead ends: 13829 [2021-12-17 21:09:55,825 INFO L226 Difference]: Without dead ends: 11018 [2021-12-17 21:09:55,834 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 [2021-12-17 21:09:55,834 INFO L933 BasicCegarLoop]: 963 mSDtfsCounter, 1554 mSDsluCounter, 1993 mSDsCounter, 0 mSdLazyCounter, 2707 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1583 SdHoareTripleChecker+Valid, 2956 SdHoareTripleChecker+Invalid, 2832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 2707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-17 21:09:55,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1583 Valid, 2956 Invalid, 2832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 2707 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-17 21:09:55,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11018 states. [2021-12-17 21:09:56,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11018 to 9293. [2021-12-17 21:09:56,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9293 states, 7965 states have (on average 1.419083490269931) internal successors, (11303), 8033 states have internal predecessors, (11303), 778 states have call successors, (778), 426 states have call predecessors, (778), 548 states have return successors, (1036), 850 states have call predecessors, (1036), 774 states have call successors, (1036) [2021-12-17 21:09:56,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9293 states to 9293 states and 13117 transitions. [2021-12-17 21:09:56,334 INFO L78 Accepts]: Start accepts. Automaton has 9293 states and 13117 transitions. Word has length 157 [2021-12-17 21:09:56,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:09:56,334 INFO L470 AbstractCegarLoop]: Abstraction has 9293 states and 13117 transitions. [2021-12-17 21:09:56,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:09:56,335 INFO L276 IsEmpty]: Start isEmpty. Operand 9293 states and 13117 transitions. [2021-12-17 21:09:56,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-17 21:09:56,338 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:09:56,338 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] [2021-12-17 21:09:56,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-17 21:09:56,339 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:09:56,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:09:56,339 INFO L85 PathProgramCache]: Analyzing trace with hash 70151086, now seen corresponding path program 1 times [2021-12-17 21:09:56,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:09:56,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750863844] [2021-12-17 21:09:56,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:09:56,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:09:56,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:56,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:09:56,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:56,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 21:09:56,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:56,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 21:09:56,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:56,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-17 21:09:56,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:56,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-17 21:09:56,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:56,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:09:56,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:09:56,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750863844] [2021-12-17 21:09:56,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750863844] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:09:56,426 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:09:56,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:09:56,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269858639] [2021-12-17 21:09:56,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:09:56,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:09:56,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:09:56,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:09:56,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:09:56,428 INFO L87 Difference]: Start difference. First operand 9293 states and 13117 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:09:58,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:09:58,183 INFO L93 Difference]: Finished difference Result 16372 states and 24388 transitions. [2021-12-17 21:09:58,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:09:58,183 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2021-12-17 21:09:58,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:09:58,209 INFO L225 Difference]: With dead ends: 16372 [2021-12-17 21:09:58,210 INFO L226 Difference]: Without dead ends: 11067 [2021-12-17 21:09:58,223 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 [2021-12-17 21:09:58,225 INFO L933 BasicCegarLoop]: 659 mSDtfsCounter, 1199 mSDsluCounter, 1075 mSDsCounter, 0 mSdLazyCounter, 1338 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1229 SdHoareTripleChecker+Valid, 1734 SdHoareTripleChecker+Invalid, 1468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:09:58,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1229 Valid, 1734 Invalid, 1468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1338 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-17 21:09:58,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11067 states. [2021-12-17 21:09:58,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11067 to 9293. [2021-12-17 21:09:58,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9293 states, 7965 states have (on average 1.416949152542373) internal successors, (11286), 8033 states have internal predecessors, (11286), 778 states have call successors, (778), 426 states have call predecessors, (778), 548 states have return successors, (1036), 850 states have call predecessors, (1036), 774 states have call successors, (1036) [2021-12-17 21:09:58,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9293 states to 9293 states and 13100 transitions. [2021-12-17 21:09:58,734 INFO L78 Accepts]: Start accepts. Automaton has 9293 states and 13100 transitions. Word has length 157 [2021-12-17 21:09:58,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:09:58,735 INFO L470 AbstractCegarLoop]: Abstraction has 9293 states and 13100 transitions. [2021-12-17 21:09:58,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:09:58,735 INFO L276 IsEmpty]: Start isEmpty. Operand 9293 states and 13100 transitions. [2021-12-17 21:09:58,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-17 21:09:58,738 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:09:58,738 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] [2021-12-17 21:09:58,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-17 21:09:58,739 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:09:58,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:09:58,739 INFO L85 PathProgramCache]: Analyzing trace with hash -636445520, now seen corresponding path program 1 times [2021-12-17 21:09:58,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:09:58,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129144971] [2021-12-17 21:09:58,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:09:58,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:09:58,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:58,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:09:58,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:58,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 21:09:58,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:58,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 21:09:58,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:58,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-17 21:09:58,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:58,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-17 21:09:58,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:09:58,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:09:58,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:09:58,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129144971] [2021-12-17 21:09:58,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129144971] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:09:58,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:09:58,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:09:58,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422867120] [2021-12-17 21:09:58,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:09:58,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:09:58,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:09:58,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:09:58,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:09:58,830 INFO L87 Difference]: Start difference. First operand 9293 states and 13100 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:10:00,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:10:00,555 INFO L93 Difference]: Finished difference Result 16354 states and 24301 transitions. [2021-12-17 21:10:00,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 21:10:00,556 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2021-12-17 21:10:00,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:10:00,577 INFO L225 Difference]: With dead ends: 16354 [2021-12-17 21:10:00,577 INFO L226 Difference]: Without dead ends: 11049 [2021-12-17 21:10:00,586 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 [2021-12-17 21:10:00,587 INFO L933 BasicCegarLoop]: 655 mSDtfsCounter, 1396 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 1184 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1426 SdHoareTripleChecker+Valid, 1494 SdHoareTripleChecker+Invalid, 1358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 1184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 21:10:00,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1426 Valid, 1494 Invalid, 1358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 1184 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 21:10:00,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11049 states. [2021-12-17 21:10:01,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11049 to 9293. [2021-12-17 21:10:01,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9293 states, 7965 states have (on average 1.4148148148148147) internal successors, (11269), 8033 states have internal predecessors, (11269), 778 states have call successors, (778), 426 states have call predecessors, (778), 548 states have return successors, (1036), 850 states have call predecessors, (1036), 774 states have call successors, (1036) [2021-12-17 21:10:01,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9293 states to 9293 states and 13083 transitions. [2021-12-17 21:10:01,038 INFO L78 Accepts]: Start accepts. Automaton has 9293 states and 13083 transitions. Word has length 157 [2021-12-17 21:10:01,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:10:01,038 INFO L470 AbstractCegarLoop]: Abstraction has 9293 states and 13083 transitions. [2021-12-17 21:10:01,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:10:01,038 INFO L276 IsEmpty]: Start isEmpty. Operand 9293 states and 13083 transitions. [2021-12-17 21:10:01,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-17 21:10:01,041 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:10:01,041 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] [2021-12-17 21:10:01,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-17 21:10:01,042 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:10:01,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:10:01,042 INFO L85 PathProgramCache]: Analyzing trace with hash 310592366, now seen corresponding path program 1 times [2021-12-17 21:10:01,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:10:01,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376078924] [2021-12-17 21:10:01,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:10:01,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:10:01,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:01,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:10:01,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:01,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 21:10:01,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:01,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 21:10:01,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:01,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-17 21:10:01,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:01,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-17 21:10:01,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:01,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:10:01,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:10:01,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376078924] [2021-12-17 21:10:01,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376078924] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:10:01,182 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:10:01,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:10:01,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533513708] [2021-12-17 21:10:01,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:10:01,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:10:01,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:10:01,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:10:01,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:10:01,184 INFO L87 Difference]: Start difference. First operand 9293 states and 13083 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:10:04,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:10:04,952 INFO L93 Difference]: Finished difference Result 24733 states and 37284 transitions. [2021-12-17 21:10:04,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 21:10:04,952 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2021-12-17 21:10:04,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:10:04,995 INFO L225 Difference]: With dead ends: 24733 [2021-12-17 21:10:04,996 INFO L226 Difference]: Without dead ends: 19428 [2021-12-17 21:10:05,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-17 21:10:05,007 INFO L933 BasicCegarLoop]: 1082 mSDtfsCounter, 1625 mSDsluCounter, 1985 mSDsCounter, 0 mSdLazyCounter, 3075 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1653 SdHoareTripleChecker+Valid, 3067 SdHoareTripleChecker+Invalid, 3205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 3075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-17 21:10:05,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1653 Valid, 3067 Invalid, 3205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 3075 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-17 21:10:05,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19428 states. [2021-12-17 21:10:05,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19428 to 14280. [2021-12-17 21:10:05,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14280 states, 12552 states have (on average 1.4591300191204588) internal successors, (18315), 12636 states have internal predecessors, (18315), 1066 states have call successors, (1066), 522 states have call predecessors, (1066), 660 states have return successors, (1502), 1154 states have call predecessors, (1502), 1062 states have call successors, (1502) [2021-12-17 21:10:05,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14280 states to 14280 states and 20883 transitions. [2021-12-17 21:10:05,931 INFO L78 Accepts]: Start accepts. Automaton has 14280 states and 20883 transitions. Word has length 157 [2021-12-17 21:10:05,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:10:05,932 INFO L470 AbstractCegarLoop]: Abstraction has 14280 states and 20883 transitions. [2021-12-17 21:10:05,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:10:05,932 INFO L276 IsEmpty]: Start isEmpty. Operand 14280 states and 20883 transitions. [2021-12-17 21:10:05,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-17 21:10:05,937 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:10:05,938 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] [2021-12-17 21:10:05,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-17 21:10:05,938 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:10:05,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:10:05,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1172425968, now seen corresponding path program 1 times [2021-12-17 21:10:05,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:10:05,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644009798] [2021-12-17 21:10:05,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:10:05,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:10:05,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:05,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:10:05,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:05,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 21:10:05,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:06,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 21:10:06,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:06,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-17 21:10:06,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:06,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-17 21:10:06,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:06,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:10:06,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:10:06,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644009798] [2021-12-17 21:10:06,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644009798] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:10:06,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:10:06,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:10:06,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355584051] [2021-12-17 21:10:06,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:10:06,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:10:06,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:10:06,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:10:06,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:10:06,046 INFO L87 Difference]: Start difference. First operand 14280 states and 20883 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:10:10,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:10:10,605 INFO L93 Difference]: Finished difference Result 43556 states and 67002 transitions. [2021-12-17 21:10:10,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 21:10:10,606 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2021-12-17 21:10:10,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:10:10,691 INFO L225 Difference]: With dead ends: 43556 [2021-12-17 21:10:10,691 INFO L226 Difference]: Without dead ends: 33264 [2021-12-17 21:10:10,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-17 21:10:10,719 INFO L933 BasicCegarLoop]: 933 mSDtfsCounter, 1789 mSDsluCounter, 1985 mSDsCounter, 0 mSdLazyCounter, 2633 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1829 SdHoareTripleChecker+Valid, 2918 SdHoareTripleChecker+Invalid, 2766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 2633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-17 21:10:10,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1829 Valid, 2918 Invalid, 2766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 2633 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-17 21:10:10,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33264 states. [2021-12-17 21:10:12,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33264 to 24266. [2021-12-17 21:10:12,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24266 states, 21754 states have (on average 1.493012779258987) internal successors, (32479), 21870 states have internal predecessors, (32479), 1626 states have call successors, (1626), 714 states have call predecessors, (1626), 884 states have return successors, (2580), 1746 states have call predecessors, (2580), 1622 states have call successors, (2580) [2021-12-17 21:10:12,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24266 states to 24266 states and 36685 transitions. [2021-12-17 21:10:12,380 INFO L78 Accepts]: Start accepts. Automaton has 24266 states and 36685 transitions. Word has length 157 [2021-12-17 21:10:12,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:10:12,380 INFO L470 AbstractCegarLoop]: Abstraction has 24266 states and 36685 transitions. [2021-12-17 21:10:12,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:10:12,381 INFO L276 IsEmpty]: Start isEmpty. Operand 24266 states and 36685 transitions. [2021-12-17 21:10:12,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-17 21:10:12,389 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:10:12,389 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] [2021-12-17 21:10:12,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-17 21:10:12,389 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:10:12,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:10:12,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1660473074, now seen corresponding path program 1 times [2021-12-17 21:10:12,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:10:12,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749585842] [2021-12-17 21:10:12,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:10:12,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:10:12,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:12,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:10:12,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:12,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 21:10:12,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:12,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 21:10:12,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:12,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-17 21:10:12,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:12,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-17 21:10:12,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:12,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:10:12,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:10:12,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749585842] [2021-12-17 21:10:12,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749585842] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:10:12,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:10:12,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:10:12,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302384470] [2021-12-17 21:10:12,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:10:12,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:10:12,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:10:12,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:10:12,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:10:12,477 INFO L87 Difference]: Start difference. First operand 24266 states and 36685 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:10:19,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:10:19,922 INFO L93 Difference]: Finished difference Result 81124 states and 126914 transitions. [2021-12-17 21:10:19,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 21:10:19,923 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2021-12-17 21:10:19,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:10:20,058 INFO L225 Difference]: With dead ends: 81124 [2021-12-17 21:10:20,058 INFO L226 Difference]: Without dead ends: 60846 [2021-12-17 21:10:20,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-17 21:10:20,099 INFO L933 BasicCegarLoop]: 1020 mSDtfsCounter, 1589 mSDsluCounter, 1985 mSDsCounter, 0 mSdLazyCounter, 2944 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1617 SdHoareTripleChecker+Valid, 3005 SdHoareTripleChecker+Invalid, 3074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 2944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-17 21:10:20,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1617 Valid, 3005 Invalid, 3074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 2944 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-17 21:10:20,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60846 states. [2021-12-17 21:10:22,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60846 to 44203. [2021-12-17 21:10:22,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44203 states, 40155 states have (on average 1.5149545511144316) internal successors, (60833), 40335 states have internal predecessors, (60833), 2714 states have call successors, (2714), 1098 states have call predecessors, (2714), 1332 states have return successors, (5190), 2898 states have call predecessors, (5190), 2710 states have call successors, (5190) [2021-12-17 21:10:22,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44203 states to 44203 states and 68737 transitions. [2021-12-17 21:10:22,972 INFO L78 Accepts]: Start accepts. Automaton has 44203 states and 68737 transitions. Word has length 157 [2021-12-17 21:10:22,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:10:22,972 INFO L470 AbstractCegarLoop]: Abstraction has 44203 states and 68737 transitions. [2021-12-17 21:10:22,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:10:22,972 INFO L276 IsEmpty]: Start isEmpty. Operand 44203 states and 68737 transitions. [2021-12-17 21:10:22,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-17 21:10:22,986 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:10:22,986 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] [2021-12-17 21:10:22,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-17 21:10:22,987 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:10:22,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:10:22,987 INFO L85 PathProgramCache]: Analyzing trace with hash 567837872, now seen corresponding path program 1 times [2021-12-17 21:10:22,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:10:22,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949316009] [2021-12-17 21:10:22,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:10:22,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:10:22,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:23,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:10:23,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:23,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 21:10:23,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:23,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 21:10:23,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:23,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-17 21:10:23,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:23,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-17 21:10:23,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:23,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:10:23,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:10:23,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949316009] [2021-12-17 21:10:23,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949316009] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:10:23,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:10:23,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:10:23,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037132702] [2021-12-17 21:10:23,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:10:23,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:10:23,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:10:23,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:10:23,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:10:23,099 INFO L87 Difference]: Start difference. First operand 44203 states and 68737 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:10:34,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 21:10:34,413 INFO L93 Difference]: Finished difference Result 155075 states and 246792 transitions. [2021-12-17 21:10:34,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 21:10:34,413 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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 157 [2021-12-17 21:10:34,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 21:10:34,749 INFO L225 Difference]: With dead ends: 155075 [2021-12-17 21:10:34,749 INFO L226 Difference]: Without dead ends: 114860 [2021-12-17 21:10:34,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-17 21:10:34,831 INFO L933 BasicCegarLoop]: 730 mSDtfsCounter, 1779 mSDsluCounter, 1404 mSDsCounter, 0 mSdLazyCounter, 2387 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1819 SdHoareTripleChecker+Valid, 2134 SdHoareTripleChecker+Invalid, 2554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 2387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-17 21:10:34,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1819 Valid, 2134 Invalid, 2554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 2387 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-17 21:10:34,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114860 states. [2021-12-17 21:10:40,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114860 to 84012. [2021-12-17 21:10:40,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84012 states, 76956 states have (on average 1.5281849368470295) internal successors, (117603), 77264 states have internal predecessors, (117603), 4826 states have call successors, (4826), 1866 states have call predecessors, (4826), 2228 states have return successors, (11804), 5138 states have call predecessors, (11804), 4822 states have call successors, (11804) [2021-12-17 21:10:40,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84012 states to 84012 states and 134233 transitions. [2021-12-17 21:10:40,453 INFO L78 Accepts]: Start accepts. Automaton has 84012 states and 134233 transitions. Word has length 157 [2021-12-17 21:10:40,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 21:10:40,454 INFO L470 AbstractCegarLoop]: Abstraction has 84012 states and 134233 transitions. [2021-12-17 21:10:40,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-17 21:10:40,454 INFO L276 IsEmpty]: Start isEmpty. Operand 84012 states and 134233 transitions. [2021-12-17 21:10:40,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-12-17 21:10:40,482 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 21:10:40,482 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] [2021-12-17 21:10:40,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-17 21:10:40,483 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 21:10:40,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 21:10:40,483 INFO L85 PathProgramCache]: Analyzing trace with hash -714334414, now seen corresponding path program 1 times [2021-12-17 21:10:40,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 21:10:40,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019081862] [2021-12-17 21:10:40,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 21:10:40,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 21:10:40,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:40,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-17 21:10:40,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:40,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-17 21:10:40,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:40,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-17 21:10:40,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:40,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-12-17 21:10:40,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:40,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-17 21:10:40,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 21:10:40,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 21:10:40,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 21:10:40,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019081862] [2021-12-17 21:10:40,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019081862] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 21:10:40,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 21:10:40,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-17 21:10:40,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030895587] [2021-12-17 21:10:40,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 21:10:40,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 21:10:40,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 21:10:40,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 21:10:40,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-17 21:10:40,572 INFO L87 Difference]: Start difference. First operand 84012 states and 134233 transitions. Second operand has 7 states, 7 states have (on average 20.857142857142858) internal successors, (146), 5 states have internal predecessors, (146), 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)