./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dfe43dac9acec5d21450031b4b25696c02a17019cbc94a74a969e06371e0741b --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 21:12:03,185 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 21:12:03,187 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 21:12:03,229 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 21:12:03,230 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 21:12:03,231 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 21:12:03,236 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 21:12:03,241 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 21:12:03,243 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 21:12:03,246 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 21:12:03,247 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 21:12:03,249 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 21:12:03,249 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 21:12:03,251 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 21:12:03,252 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 21:12:03,254 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 21:12:03,254 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 21:12:03,256 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 21:12:03,259 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 21:12:03,261 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 21:12:03,262 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 21:12:03,262 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 21:12:03,263 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 21:12:03,264 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 21:12:03,265 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 21:12:03,267 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 21:12:03,267 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 21:12:03,267 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 21:12:03,268 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 21:12:03,268 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 21:12:03,269 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 21:12:03,269 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 21:12:03,270 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 21:12:03,270 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 21:12:03,271 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 21:12:03,272 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 21:12:03,272 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 21:12:03,273 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 21:12:03,273 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 21:12:03,273 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 21:12:03,274 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 21:12:03,275 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 21:12:03,276 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 21:12:03,307 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 21:12:03,308 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 21:12:03,308 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 21:12:03,308 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 21:12:03,309 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 21:12:03,309 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 21:12:03,309 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 21:12:03,310 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 21:12:03,310 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 21:12:03,311 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 21:12:03,311 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 21:12:03,311 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 21:12:03,311 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 21:12:03,311 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 21:12:03,312 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 21:12:03,312 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 21:12:03,312 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 21:12:03,312 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 21:12:03,312 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 21:12:03,313 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 21:12:03,313 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 21:12:03,313 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 21:12:03,313 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 21:12:03,313 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 21:12:03,314 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:12:03,314 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 21:12:03,314 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 21:12:03,314 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 21:12:03,314 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 21:12:03,315 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 21:12:03,315 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 21:12:03,315 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 21:12:03,315 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 21:12:03,315 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dfe43dac9acec5d21450031b4b25696c02a17019cbc94a74a969e06371e0741b [2022-07-13 21:12:03,535 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 21:12:03,565 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 21:12:03,569 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 21:12:03,569 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 21:12:03,570 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 21:12:03,571 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c [2022-07-13 21:12:03,630 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53a97f473/612ad13ce944413ba751e4d9c5941cd9/FLAGb7362a31a [2022-07-13 21:12:04,096 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 21:12:04,097 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c [2022-07-13 21:12:04,121 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53a97f473/612ad13ce944413ba751e4d9c5941cd9/FLAGb7362a31a [2022-07-13 21:12:04,606 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53a97f473/612ad13ce944413ba751e4d9c5941cd9 [2022-07-13 21:12:04,608 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 21:12:04,609 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 21:12:04,612 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 21:12:04,612 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 21:12:04,615 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 21:12:04,616 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:12:04" (1/1) ... [2022-07-13 21:12:04,617 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@289e7966 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:12:04, skipping insertion in model container [2022-07-13 21:12:04,618 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 09:12:04" (1/1) ... [2022-07-13 21:12:04,624 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 21:12:04,673 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 21:12:04,809 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c[914,927] [2022-07-13 21:12:04,851 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c[7115,7128] [2022-07-13 21:12:04,968 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:12:04,976 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 21:12:04,984 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c[914,927] [2022-07-13 21:12:04,997 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.08.cil-2.c[7115,7128] [2022-07-13 21:12:05,029 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 21:12:05,046 INFO L208 MainTranslator]: Completed translation [2022-07-13 21:12:05,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:12:05 WrapperNode [2022-07-13 21:12:05,047 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 21:12:05,048 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 21:12:05,048 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 21:12:05,048 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 21:12:05,054 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:12:05" (1/1) ... [2022-07-13 21:12:05,065 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:12:05" (1/1) ... [2022-07-13 21:12:05,101 INFO L137 Inliner]: procedures = 69, calls = 82, calls flagged for inlining = 37, calls inlined = 37, statements flattened = 813 [2022-07-13 21:12:05,101 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 21:12:05,102 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 21:12:05,102 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 21:12:05,102 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 21:12:05,109 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:12:05" (1/1) ... [2022-07-13 21:12:05,109 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:12:05" (1/1) ... [2022-07-13 21:12:05,115 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:12:05" (1/1) ... [2022-07-13 21:12:05,116 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:12:05" (1/1) ... [2022-07-13 21:12:05,128 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:12:05" (1/1) ... [2022-07-13 21:12:05,158 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:12:05" (1/1) ... [2022-07-13 21:12:05,174 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:12:05" (1/1) ... [2022-07-13 21:12:05,178 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 21:12:05,179 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 21:12:05,179 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 21:12:05,179 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 21:12:05,181 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:12:05" (1/1) ... [2022-07-13 21:12:05,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 21:12:05,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:12:05,216 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) [2022-07-13 21:12:05,240 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 [2022-07-13 21:12:05,257 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 21:12:05,257 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-07-13 21:12:05,257 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-07-13 21:12:05,257 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2022-07-13 21:12:05,258 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2022-07-13 21:12:05,259 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2022-07-13 21:12:05,259 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2022-07-13 21:12:05,259 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2022-07-13 21:12:05,259 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2022-07-13 21:12:05,259 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2022-07-13 21:12:05,259 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2022-07-13 21:12:05,259 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2022-07-13 21:12:05,260 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2022-07-13 21:12:05,260 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2022-07-13 21:12:05,260 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2022-07-13 21:12:05,260 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2022-07-13 21:12:05,260 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2022-07-13 21:12:05,260 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2022-07-13 21:12:05,261 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2022-07-13 21:12:05,261 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2022-07-13 21:12:05,261 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2022-07-13 21:12:05,261 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2022-07-13 21:12:05,261 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2022-07-13 21:12:05,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 21:12:05,262 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2022-07-13 21:12:05,262 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2022-07-13 21:12:05,262 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2022-07-13 21:12:05,262 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2022-07-13 21:12:05,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 21:12:05,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 21:12:05,263 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2022-07-13 21:12:05,263 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2022-07-13 21:12:05,263 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2022-07-13 21:12:05,263 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2022-07-13 21:12:05,427 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 21:12:05,428 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 21:12:06,076 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 21:12:06,086 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 21:12:06,087 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2022-07-13 21:12:06,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:12:06 BoogieIcfgContainer [2022-07-13 21:12:06,090 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 21:12:06,092 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 21:12:06,093 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 21:12:06,101 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 21:12:06,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 09:12:04" (1/3) ... [2022-07-13 21:12:06,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13b71698 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:12:06, skipping insertion in model container [2022-07-13 21:12:06,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 09:12:05" (2/3) ... [2022-07-13 21:12:06,103 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13b71698 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 09:12:06, skipping insertion in model container [2022-07-13 21:12:06,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 09:12:06" (3/3) ... [2022-07-13 21:12:06,104 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.08.cil-2.c [2022-07-13 21:12:06,116 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 21:12:06,117 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-13 21:12:06,204 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 21:12:06,209 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5cae86fe, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@a252dc1 [2022-07-13 21:12:06,210 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-13 21:12:06,214 INFO L276 IsEmpty]: Start isEmpty. Operand has 391 states, 335 states have (on average 1.626865671641791) internal successors, (545), 343 states have internal predecessors, (545), 38 states have call successors, (38), 15 states have call predecessors, (38), 15 states have return successors, (38), 36 states have call predecessors, (38), 38 states have call successors, (38) [2022-07-13 21:12:06,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-13 21:12:06,226 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:12:06,226 INFO L195 NwaCegarLoop]: 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] [2022-07-13 21:12:06,227 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:12:06,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:12:06,231 INFO L85 PathProgramCache]: Analyzing trace with hash 2101552932, now seen corresponding path program 1 times [2022-07-13 21:12:06,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:12:06,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621384409] [2022-07-13 21:12:06,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:12:06,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:12:06,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:06,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:12:06,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:06,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 21:12:06,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:06,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-13 21:12:06,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:06,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 21:12:06,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:06,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 21:12:06,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:06,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 21:12:06,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:06,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-13 21:12:06,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:06,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:12:06,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:12:06,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621384409] [2022-07-13 21:12:06,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621384409] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:12:06,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:12:06,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 21:12:06,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513000321] [2022-07-13 21:12:06,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:12:06,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 21:12:06,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:12:06,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 21:12:06,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-13 21:12:06,629 INFO L87 Difference]: Start difference. First operand has 391 states, 335 states have (on average 1.626865671641791) internal successors, (545), 343 states have internal predecessors, (545), 38 states have call successors, (38), 15 states have call predecessors, (38), 15 states have return successors, (38), 36 states have call predecessors, (38), 38 states have call successors, (38) 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) [2022-07-13 21:12:07,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:12:07,700 INFO L93 Difference]: Finished difference Result 892 states and 1408 transitions. [2022-07-13 21:12:07,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 21:12:07,703 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 [2022-07-13 21:12:07,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:12:07,733 INFO L225 Difference]: With dead ends: 892 [2022-07-13 21:12:07,733 INFO L226 Difference]: Without dead ends: 515 [2022-07-13 21:12:07,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2022-07-13 21:12:07,745 INFO L413 NwaCegarLoop]: 591 mSDtfsCounter, 1227 mSDsluCounter, 1103 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1232 SdHoareTripleChecker+Valid, 1694 SdHoareTripleChecker+Invalid, 1105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-13 21:12:07,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1232 Valid, 1694 Invalid, 1105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 861 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-13 21:12:07,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-07-13 21:12:07,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 476. [2022-07-13 21:12:07,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 403 states have (on average 1.5086848635235732) internal successors, (608), 410 states have internal predecessors, (608), 49 states have call successors, (49), 22 states have call predecessors, (49), 22 states have return successors, (50), 46 states have call predecessors, (50), 45 states have call successors, (50) [2022-07-13 21:12:07,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 707 transitions. [2022-07-13 21:12:07,836 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 707 transitions. Word has length 65 [2022-07-13 21:12:07,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:12:07,837 INFO L495 AbstractCegarLoop]: Abstraction has 476 states and 707 transitions. [2022-07-13 21:12:07,837 INFO L496 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) [2022-07-13 21:12:07,837 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 707 transitions. [2022-07-13 21:12:07,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-13 21:12:07,841 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:12:07,841 INFO L195 NwaCegarLoop]: 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] [2022-07-13 21:12:07,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 21:12:07,842 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:12:07,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:12:07,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1789628413, now seen corresponding path program 1 times [2022-07-13 21:12:07,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:12:07,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539158027] [2022-07-13 21:12:07,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:12:07,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:12:07,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:07,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:12:07,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:07,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 21:12:07,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:07,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-13 21:12:07,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:07,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 21:12:07,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:07,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 21:12:07,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:07,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 21:12:07,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:07,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-13 21:12:07,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:07,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:12:07,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:12:07,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539158027] [2022-07-13 21:12:07,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539158027] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:12:07,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:12:07,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 21:12:07,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753149611] [2022-07-13 21:12:07,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:12:07,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 21:12:07,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:12:07,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 21:12:07,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-13 21:12:07,981 INFO L87 Difference]: Start difference. First operand 476 states and 707 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) [2022-07-13 21:12:08,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:12:08,970 INFO L93 Difference]: Finished difference Result 823 states and 1184 transitions. [2022-07-13 21:12:08,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-13 21:12:08,970 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 [2022-07-13 21:12:08,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:12:08,974 INFO L225 Difference]: With dead ends: 823 [2022-07-13 21:12:08,975 INFO L226 Difference]: Without dead ends: 646 [2022-07-13 21:12:08,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2022-07-13 21:12:08,977 INFO L413 NwaCegarLoop]: 624 mSDtfsCounter, 1155 mSDsluCounter, 1577 mSDsCounter, 0 mSdLazyCounter, 1164 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1182 SdHoareTripleChecker+Valid, 2201 SdHoareTripleChecker+Invalid, 1302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-13 21:12:08,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1182 Valid, 2201 Invalid, 1302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1164 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-13 21:12:08,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2022-07-13 21:12:09,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 572. [2022-07-13 21:12:09,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 479 states have (on average 1.4864300626304803) internal successors, (712), 488 states have internal predecessors, (712), 60 states have call successors, (60), 29 states have call predecessors, (60), 31 states have return successors, (69), 58 states have call predecessors, (69), 56 states have call successors, (69) [2022-07-13 21:12:09,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 841 transitions. [2022-07-13 21:12:09,018 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 841 transitions. Word has length 65 [2022-07-13 21:12:09,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:12:09,019 INFO L495 AbstractCegarLoop]: Abstraction has 572 states and 841 transitions. [2022-07-13 21:12:09,019 INFO L496 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) [2022-07-13 21:12:09,019 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 841 transitions. [2022-07-13 21:12:09,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-13 21:12:09,024 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:12:09,025 INFO L195 NwaCegarLoop]: 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] [2022-07-13 21:12:09,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 21:12:09,025 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:12:09,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:12:09,027 INFO L85 PathProgramCache]: Analyzing trace with hash 476752773, now seen corresponding path program 1 times [2022-07-13 21:12:09,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:12:09,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380732648] [2022-07-13 21:12:09,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:12:09,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:12:09,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:09,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:12:09,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:09,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 21:12:09,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:09,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-13 21:12:09,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:09,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 21:12:09,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:09,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 21:12:09,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:09,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 21:12:09,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:09,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-13 21:12:09,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:09,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:12:09,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:12:09,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380732648] [2022-07-13 21:12:09,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380732648] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:12:09,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:12:09,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-13 21:12:09,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776486650] [2022-07-13 21:12:09,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:12:09,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 21:12:09,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:12:09,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 21:12:09,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-13 21:12:09,183 INFO L87 Difference]: Start difference. First operand 572 states and 841 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-13 21:12:10,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:12:10,084 INFO L93 Difference]: Finished difference Result 873 states and 1255 transitions. [2022-07-13 21:12:10,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 21:12:10,085 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2022-07-13 21:12:10,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:12:10,088 INFO L225 Difference]: With dead ends: 873 [2022-07-13 21:12:10,088 INFO L226 Difference]: Without dead ends: 606 [2022-07-13 21:12:10,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-13 21:12:10,090 INFO L413 NwaCegarLoop]: 563 mSDtfsCounter, 731 mSDsluCounter, 1703 mSDsCounter, 0 mSdLazyCounter, 1293 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 732 SdHoareTripleChecker+Valid, 2266 SdHoareTripleChecker+Invalid, 1428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-13 21:12:10,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [732 Valid, 2266 Invalid, 1428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1293 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-13 21:12:10,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2022-07-13 21:12:10,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 577. [2022-07-13 21:12:10,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 483 states have (on average 1.4782608695652173) internal successors, (714), 492 states have internal predecessors, (714), 60 states have call successors, (60), 29 states have call predecessors, (60), 32 states have return successors, (70), 59 states have call predecessors, (70), 56 states have call successors, (70) [2022-07-13 21:12:10,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 844 transitions. [2022-07-13 21:12:10,142 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 844 transitions. Word has length 65 [2022-07-13 21:12:10,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:12:10,143 INFO L495 AbstractCegarLoop]: Abstraction has 577 states and 844 transitions. [2022-07-13 21:12:10,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-13 21:12:10,143 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 844 transitions. [2022-07-13 21:12:10,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-13 21:12:10,145 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:12:10,145 INFO L195 NwaCegarLoop]: 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] [2022-07-13 21:12:10,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 21:12:10,146 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:12:10,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:12:10,146 INFO L85 PathProgramCache]: Analyzing trace with hash -552606525, now seen corresponding path program 1 times [2022-07-13 21:12:10,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:12:10,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873403612] [2022-07-13 21:12:10,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:12:10,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:12:10,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:10,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:12:10,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:10,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 21:12:10,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:10,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-13 21:12:10,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:10,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 21:12:10,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:10,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 21:12:10,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:10,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 21:12:10,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:10,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-13 21:12:10,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:10,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:12:10,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:12:10,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873403612] [2022-07-13 21:12:10,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873403612] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:12:10,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:12:10,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-13 21:12:10,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740421370] [2022-07-13 21:12:10,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:12:10,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 21:12:10,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:12:10,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 21:12:10,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-13 21:12:10,267 INFO L87 Difference]: Start difference. First operand 577 states and 844 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 6 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-13 21:12:11,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:12:11,937 INFO L93 Difference]: Finished difference Result 2239 states and 3116 transitions. [2022-07-13 21:12:11,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-13 21:12:11,938 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 6 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 65 [2022-07-13 21:12:11,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:12:11,947 INFO L225 Difference]: With dead ends: 2239 [2022-07-13 21:12:11,947 INFO L226 Difference]: Without dead ends: 1967 [2022-07-13 21:12:11,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=235, Invalid=887, Unknown=0, NotChecked=0, Total=1122 [2022-07-13 21:12:11,950 INFO L413 NwaCegarLoop]: 790 mSDtfsCounter, 2513 mSDsluCounter, 1352 mSDsCounter, 0 mSdLazyCounter, 1417 mSolverCounterSat, 563 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2530 SdHoareTripleChecker+Valid, 2142 SdHoareTripleChecker+Invalid, 1980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 563 IncrementalHoareTripleChecker+Valid, 1417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-13 21:12:11,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2530 Valid, 2142 Invalid, 1980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [563 Valid, 1417 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-13 21:12:11,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2022-07-13 21:12:12,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1717. [2022-07-13 21:12:12,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1717 states, 1383 states have (on average 1.3702096890817064) internal successors, (1895), 1412 states have internal predecessors, (1895), 177 states have call successors, (177), 131 states have call predecessors, (177), 155 states have return successors, (256), 177 states have call predecessors, (256), 173 states have call successors, (256) [2022-07-13 21:12:12,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1717 states to 1717 states and 2328 transitions. [2022-07-13 21:12:12,052 INFO L78 Accepts]: Start accepts. Automaton has 1717 states and 2328 transitions. Word has length 65 [2022-07-13 21:12:12,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:12:12,053 INFO L495 AbstractCegarLoop]: Abstraction has 1717 states and 2328 transitions. [2022-07-13 21:12:12,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 6 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-13 21:12:12,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1717 states and 2328 transitions. [2022-07-13 21:12:12,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-13 21:12:12,054 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:12:12,055 INFO L195 NwaCegarLoop]: 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] [2022-07-13 21:12:12,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 21:12:12,055 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:12:12,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:12:12,056 INFO L85 PathProgramCache]: Analyzing trace with hash 498842564, now seen corresponding path program 1 times [2022-07-13 21:12:12,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:12:12,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412789582] [2022-07-13 21:12:12,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:12:12,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:12:12,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:12,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:12:12,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:12,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 21:12:12,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:12,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-13 21:12:12,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:12,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 21:12:12,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:12,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 21:12:12,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:12,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 21:12:12,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:12,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-13 21:12:12,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:12,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:12:12,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:12:12,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412789582] [2022-07-13 21:12:12,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412789582] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:12:12,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:12:12,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-13 21:12:12,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671734315] [2022-07-13 21:12:12,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:12:12,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 21:12:12,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:12:12,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 21:12:12,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-13 21:12:12,157 INFO L87 Difference]: Start difference. First operand 1717 states and 2328 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-13 21:12:13,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:12:13,116 INFO L93 Difference]: Finished difference Result 3318 states and 4452 transitions. [2022-07-13 21:12:13,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 21:12:13,117 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2022-07-13 21:12:13,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:12:13,126 INFO L225 Difference]: With dead ends: 3318 [2022-07-13 21:12:13,126 INFO L226 Difference]: Without dead ends: 1906 [2022-07-13 21:12:13,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-07-13 21:12:13,135 INFO L413 NwaCegarLoop]: 561 mSDtfsCounter, 490 mSDsluCounter, 1962 mSDsCounter, 0 mSdLazyCounter, 1348 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 2523 SdHoareTripleChecker+Invalid, 1440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-13 21:12:13,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [491 Valid, 2523 Invalid, 1440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1348 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-13 21:12:13,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1906 states. [2022-07-13 21:12:13,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1906 to 1762. [2022-07-13 21:12:13,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1762 states, 1419 states have (on average 1.354474982381959) internal successors, (1922), 1448 states have internal predecessors, (1922), 177 states have call successors, (177), 131 states have call predecessors, (177), 164 states have return successors, (268), 186 states have call predecessors, (268), 173 states have call successors, (268) [2022-07-13 21:12:13,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1762 states to 1762 states and 2367 transitions. [2022-07-13 21:12:13,260 INFO L78 Accepts]: Start accepts. Automaton has 1762 states and 2367 transitions. Word has length 65 [2022-07-13 21:12:13,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:12:13,261 INFO L495 AbstractCegarLoop]: Abstraction has 1762 states and 2367 transitions. [2022-07-13 21:12:13,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-13 21:12:13,261 INFO L276 IsEmpty]: Start isEmpty. Operand 1762 states and 2367 transitions. [2022-07-13 21:12:13,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-13 21:12:13,263 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:12:13,263 INFO L195 NwaCegarLoop]: 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] [2022-07-13 21:12:13,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 21:12:13,264 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:12:13,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:12:13,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1885045958, now seen corresponding path program 1 times [2022-07-13 21:12:13,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:12:13,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369018960] [2022-07-13 21:12:13,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:12:13,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:12:13,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:13,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:12:13,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:13,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 21:12:13,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:13,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-13 21:12:13,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:13,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 21:12:13,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:13,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 21:12:13,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:13,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 21:12:13,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:13,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-13 21:12:13,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:13,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:12:13,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:12:13,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369018960] [2022-07-13 21:12:13,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369018960] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:12:13,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:12:13,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 21:12:13,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475970897] [2022-07-13 21:12:13,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:12:13,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 21:12:13,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:12:13,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 21:12:13,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-07-13 21:12:13,383 INFO L87 Difference]: Start difference. First operand 1762 states and 2367 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) [2022-07-13 21:12:14,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:12:14,374 INFO L93 Difference]: Finished difference Result 3197 states and 4206 transitions. [2022-07-13 21:12:14,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-13 21:12:14,375 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 [2022-07-13 21:12:14,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:12:14,384 INFO L225 Difference]: With dead ends: 3197 [2022-07-13 21:12:14,385 INFO L226 Difference]: Without dead ends: 1960 [2022-07-13 21:12:14,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2022-07-13 21:12:14,390 INFO L413 NwaCegarLoop]: 573 mSDtfsCounter, 1131 mSDsluCounter, 1362 mSDsCounter, 0 mSdLazyCounter, 1109 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1156 SdHoareTripleChecker+Valid, 1935 SdHoareTripleChecker+Invalid, 1259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 1109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-13 21:12:14,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1156 Valid, 1935 Invalid, 1259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 1109 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-13 21:12:14,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1960 states. [2022-07-13 21:12:14,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1960 to 1740. [2022-07-13 21:12:14,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1740 states, 1405 states have (on average 1.3508896797153025) internal successors, (1898), 1428 states have internal predecessors, (1898), 177 states have call successors, (177), 131 states have call predecessors, (177), 156 states have return successors, (252), 184 states have call predecessors, (252), 173 states have call successors, (252) [2022-07-13 21:12:14,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1740 states to 1740 states and 2327 transitions. [2022-07-13 21:12:14,483 INFO L78 Accepts]: Start accepts. Automaton has 1740 states and 2327 transitions. Word has length 65 [2022-07-13 21:12:14,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:12:14,485 INFO L495 AbstractCegarLoop]: Abstraction has 1740 states and 2327 transitions. [2022-07-13 21:12:14,485 INFO L496 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) [2022-07-13 21:12:14,485 INFO L276 IsEmpty]: Start isEmpty. Operand 1740 states and 2327 transitions. [2022-07-13 21:12:14,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-13 21:12:14,487 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:12:14,487 INFO L195 NwaCegarLoop]: 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] [2022-07-13 21:12:14,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-13 21:12:14,488 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:12:14,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:12:14,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1751032452, now seen corresponding path program 1 times [2022-07-13 21:12:14,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:12:14,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142383729] [2022-07-13 21:12:14,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:12:14,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:12:14,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:14,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:12:14,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:14,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 21:12:14,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:14,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-13 21:12:14,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:14,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 21:12:14,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:14,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 21:12:14,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:14,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 21:12:14,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:14,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-13 21:12:14,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:14,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:12:14,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:12:14,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142383729] [2022-07-13 21:12:14,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142383729] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:12:14,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:12:14,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:12:14,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273316176] [2022-07-13 21:12:14,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:12:14,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:12:14,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:12:14,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:12:14,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:12:14,611 INFO L87 Difference]: Start difference. First operand 1740 states and 2327 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-13 21:12:15,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:12:15,102 INFO L93 Difference]: Finished difference Result 4815 states and 6306 transitions. [2022-07-13 21:12:15,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 21:12:15,102 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2022-07-13 21:12:15,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:12:15,118 INFO L225 Difference]: With dead ends: 4815 [2022-07-13 21:12:15,118 INFO L226 Difference]: Without dead ends: 3383 [2022-07-13 21:12:15,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2022-07-13 21:12:15,126 INFO L413 NwaCegarLoop]: 544 mSDtfsCounter, 1650 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1681 SdHoareTripleChecker+Valid, 1121 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 21:12:15,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1681 Valid, 1121 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 21:12:15,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3383 states. [2022-07-13 21:12:15,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3383 to 3111. [2022-07-13 21:12:15,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3111 states, 2471 states have (on average 1.301092675030352) internal successors, (3215), 2515 states have internal predecessors, (3215), 329 states have call successors, (329), 254 states have call predecessors, (329), 309 states have return successors, (524), 348 states have call predecessors, (524), 325 states have call successors, (524) [2022-07-13 21:12:15,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3111 states to 3111 states and 4068 transitions. [2022-07-13 21:12:15,299 INFO L78 Accepts]: Start accepts. Automaton has 3111 states and 4068 transitions. Word has length 65 [2022-07-13 21:12:15,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:12:15,300 INFO L495 AbstractCegarLoop]: Abstraction has 3111 states and 4068 transitions. [2022-07-13 21:12:15,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-13 21:12:15,300 INFO L276 IsEmpty]: Start isEmpty. Operand 3111 states and 4068 transitions. [2022-07-13 21:12:15,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-13 21:12:15,302 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:12:15,302 INFO L195 NwaCegarLoop]: 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] [2022-07-13 21:12:15,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 21:12:15,303 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:12:15,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:12:15,303 INFO L85 PathProgramCache]: Analyzing trace with hash -869770994, now seen corresponding path program 1 times [2022-07-13 21:12:15,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:12:15,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640140574] [2022-07-13 21:12:15,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:12:15,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:12:15,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:15,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:12:15,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:15,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 21:12:15,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:15,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-13 21:12:15,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:15,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 21:12:15,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:15,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 21:12:15,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:15,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 21:12:15,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:15,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-13 21:12:15,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:15,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:12:15,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:12:15,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640140574] [2022-07-13 21:12:15,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640140574] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:12:15,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:12:15,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 21:12:15,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467307397] [2022-07-13 21:12:15,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:12:15,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 21:12:15,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:12:15,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 21:12:15,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 21:12:15,375 INFO L87 Difference]: Start difference. First operand 3111 states and 4068 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-13 21:12:16,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:12:16,029 INFO L93 Difference]: Finished difference Result 8129 states and 10582 transitions. [2022-07-13 21:12:16,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 21:12:16,030 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2022-07-13 21:12:16,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:12:16,061 INFO L225 Difference]: With dead ends: 8129 [2022-07-13 21:12:16,062 INFO L226 Difference]: Without dead ends: 5305 [2022-07-13 21:12:16,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-07-13 21:12:16,071 INFO L413 NwaCegarLoop]: 577 mSDtfsCounter, 934 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 942 SdHoareTripleChecker+Valid, 1377 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 21:12:16,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [942 Valid, 1377 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 21:12:16,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5305 states. [2022-07-13 21:12:16,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5305 to 4789. [2022-07-13 21:12:16,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4789 states, 3756 states have (on average 1.2819488817891374) internal successors, (4815), 3807 states have internal predecessors, (4815), 523 states have call successors, (523), 428 states have call predecessors, (523), 508 states have return successors, (845), 560 states have call predecessors, (845), 519 states have call successors, (845) [2022-07-13 21:12:16,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4789 states to 4789 states and 6183 transitions. [2022-07-13 21:12:16,336 INFO L78 Accepts]: Start accepts. Automaton has 4789 states and 6183 transitions. Word has length 66 [2022-07-13 21:12:16,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:12:16,337 INFO L495 AbstractCegarLoop]: Abstraction has 4789 states and 6183 transitions. [2022-07-13 21:12:16,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-13 21:12:16,337 INFO L276 IsEmpty]: Start isEmpty. Operand 4789 states and 6183 transitions. [2022-07-13 21:12:16,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-13 21:12:16,341 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:12:16,341 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:12:16,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 21:12:16,342 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:12:16,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:12:16,342 INFO L85 PathProgramCache]: Analyzing trace with hash -79299166, now seen corresponding path program 1 times [2022-07-13 21:12:16,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:12:16,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191035559] [2022-07-13 21:12:16,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:12:16,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:12:16,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:16,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:12:16,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:16,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 21:12:16,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:16,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-13 21:12:16,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:16,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 21:12:16,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:16,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 21:12:16,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:16,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 21:12:16,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:16,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-13 21:12:16,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:16,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:12:16,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:12:16,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191035559] [2022-07-13 21:12:16,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191035559] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:12:16,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:12:16,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:12:16,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210459516] [2022-07-13 21:12:16,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:12:16,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:12:16,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:12:16,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:12:16,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:12:16,409 INFO L87 Difference]: Start difference. First operand 4789 states and 6183 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-13 21:12:17,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:12:17,066 INFO L93 Difference]: Finished difference Result 6419 states and 8185 transitions. [2022-07-13 21:12:17,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 21:12:17,067 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 73 [2022-07-13 21:12:17,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:12:17,097 INFO L225 Difference]: With dead ends: 6419 [2022-07-13 21:12:17,098 INFO L226 Difference]: Without dead ends: 6416 [2022-07-13 21:12:17,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2022-07-13 21:12:17,102 INFO L413 NwaCegarLoop]: 575 mSDtfsCounter, 1639 mSDsluCounter, 829 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1648 SdHoareTripleChecker+Valid, 1404 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 21:12:17,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1648 Valid, 1404 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-13 21:12:17,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6416 states. [2022-07-13 21:12:17,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6416 to 5843. [2022-07-13 21:12:17,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5843 states, 4559 states have (on average 1.2689186225049354) internal successors, (5785), 4619 states have internal predecessors, (5785), 649 states have call successors, (649), 542 states have call predecessors, (649), 633 states have return successors, (1038), 688 states have call predecessors, (1038), 646 states have call successors, (1038) [2022-07-13 21:12:17,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5843 states to 5843 states and 7472 transitions. [2022-07-13 21:12:17,468 INFO L78 Accepts]: Start accepts. Automaton has 5843 states and 7472 transitions. Word has length 73 [2022-07-13 21:12:17,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:12:17,470 INFO L495 AbstractCegarLoop]: Abstraction has 5843 states and 7472 transitions. [2022-07-13 21:12:17,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-13 21:12:17,471 INFO L276 IsEmpty]: Start isEmpty. Operand 5843 states and 7472 transitions. [2022-07-13 21:12:17,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-13 21:12:17,474 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:12:17,474 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:12:17,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-13 21:12:17,474 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:12:17,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:12:17,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1835525111, now seen corresponding path program 1 times [2022-07-13 21:12:17,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:12:17,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830278212] [2022-07-13 21:12:17,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:12:17,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:12:17,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:17,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:12:17,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:17,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 21:12:17,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:17,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-13 21:12:17,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:17,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 21:12:17,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:17,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 21:12:17,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:17,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 21:12:17,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:17,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-13 21:12:17,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:17,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:12:17,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:12:17,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830278212] [2022-07-13 21:12:17,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830278212] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:12:17,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630374588] [2022-07-13 21:12:17,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:12:17,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:12:17,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:12:17,609 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) [2022-07-13 21:12:17,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 21:12:17,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:17,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-13 21:12:17,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:12:18,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:12:18,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 21:12:18,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:12:18,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630374588] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 21:12:18,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 21:12:18,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 10 [2022-07-13 21:12:18,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843233138] [2022-07-13 21:12:18,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 21:12:18,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-13 21:12:18,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:12:18,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-13 21:12:18,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:12:18,315 INFO L87 Difference]: Start difference. First operand 5843 states and 7472 transitions. Second operand has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-07-13 21:12:20,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:12:20,280 INFO L93 Difference]: Finished difference Result 13489 states and 17000 transitions. [2022-07-13 21:12:20,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-13 21:12:20,281 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 74 [2022-07-13 21:12:20,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:12:20,342 INFO L225 Difference]: With dead ends: 13489 [2022-07-13 21:12:20,342 INFO L226 Difference]: Without dead ends: 13486 [2022-07-13 21:12:20,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 174 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2022-07-13 21:12:20,351 INFO L413 NwaCegarLoop]: 737 mSDtfsCounter, 1523 mSDsluCounter, 2005 mSDsCounter, 0 mSdLazyCounter, 2029 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1588 SdHoareTripleChecker+Valid, 2742 SdHoareTripleChecker+Invalid, 2232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 2029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-13 21:12:20,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1588 Valid, 2742 Invalid, 2232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 2029 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-13 21:12:20,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13486 states. [2022-07-13 21:12:21,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13486 to 11101. [2022-07-13 21:12:21,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11101 states, 8651 states have (on average 1.2592763842330366) internal successors, (10894), 8763 states have internal predecessors, (10894), 1215 states have call successors, (1215), 1032 states have call predecessors, (1215), 1233 states have return successors, (1977), 1312 states have call predecessors, (1977), 1212 states have call successors, (1977) [2022-07-13 21:12:21,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11101 states to 11101 states and 14086 transitions. [2022-07-13 21:12:21,062 INFO L78 Accepts]: Start accepts. Automaton has 11101 states and 14086 transitions. Word has length 74 [2022-07-13 21:12:21,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:12:21,062 INFO L495 AbstractCegarLoop]: Abstraction has 11101 states and 14086 transitions. [2022-07-13 21:12:21,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-07-13 21:12:21,063 INFO L276 IsEmpty]: Start isEmpty. Operand 11101 states and 14086 transitions. [2022-07-13 21:12:21,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-13 21:12:21,065 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:12:21,065 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:12:21,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 21:12:21,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-13 21:12:21,291 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:12:21,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:12:21,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1541776738, now seen corresponding path program 2 times [2022-07-13 21:12:21,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:12:21,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334963342] [2022-07-13 21:12:21,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:12:21,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:12:21,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:21,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:12:21,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:21,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 21:12:21,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:21,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-13 21:12:21,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:21,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 21:12:21,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:21,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 21:12:21,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:21,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 21:12:21,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:21,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-13 21:12:21,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:21,353 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:12:21,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:12:21,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334963342] [2022-07-13 21:12:21,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334963342] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:12:21,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:12:21,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 21:12:21,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064788646] [2022-07-13 21:12:21,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:12:21,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 21:12:21,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:12:21,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 21:12:21,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-13 21:12:21,356 INFO L87 Difference]: Start difference. First operand 11101 states and 14086 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-13 21:12:22,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:12:22,092 INFO L93 Difference]: Finished difference Result 17644 states and 22428 transitions. [2022-07-13 21:12:22,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 21:12:22,093 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 77 [2022-07-13 21:12:22,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:12:22,123 INFO L225 Difference]: With dead ends: 17644 [2022-07-13 21:12:22,123 INFO L226 Difference]: Without dead ends: 7706 [2022-07-13 21:12:22,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-13 21:12:22,149 INFO L413 NwaCegarLoop]: 620 mSDtfsCounter, 1000 mSDsluCounter, 889 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1031 SdHoareTripleChecker+Valid, 1509 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 21:12:22,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1031 Valid, 1509 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 21:12:22,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7706 states. [2022-07-13 21:12:22,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7706 to 7154. [2022-07-13 21:12:22,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7154 states, 5598 states have (on average 1.2386566630939622) internal successors, (6934), 5666 states have internal predecessors, (6934), 782 states have call successors, (782), 656 states have call predecessors, (782), 772 states have return successors, (1196), 838 states have call predecessors, (1196), 779 states have call successors, (1196) [2022-07-13 21:12:22,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7154 states to 7154 states and 8912 transitions. [2022-07-13 21:12:22,597 INFO L78 Accepts]: Start accepts. Automaton has 7154 states and 8912 transitions. Word has length 77 [2022-07-13 21:12:22,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:12:22,598 INFO L495 AbstractCegarLoop]: Abstraction has 7154 states and 8912 transitions. [2022-07-13 21:12:22,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-13 21:12:22,599 INFO L276 IsEmpty]: Start isEmpty. Operand 7154 states and 8912 transitions. [2022-07-13 21:12:22,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-13 21:12:22,602 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:12:22,602 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:12:22,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-13 21:12:22,602 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:12:22,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:12:22,603 INFO L85 PathProgramCache]: Analyzing trace with hash 68149481, now seen corresponding path program 1 times [2022-07-13 21:12:22,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:12:22,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705814980] [2022-07-13 21:12:22,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:12:22,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:12:22,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:22,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:12:22,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:22,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 21:12:22,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:22,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-13 21:12:22,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:22,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 21:12:22,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:22,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 21:12:22,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:22,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 21:12:22,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:22,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-13 21:12:22,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:22,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-13 21:12:22,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:22,692 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 21:12:22,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:12:22,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705814980] [2022-07-13 21:12:22,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705814980] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:12:22,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:12:22,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 21:12:22,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063602551] [2022-07-13 21:12:22,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:12:22,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 21:12:22,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:12:22,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 21:12:22,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-13 21:12:22,695 INFO L87 Difference]: Start difference. First operand 7154 states and 8912 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-13 21:12:24,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:12:24,350 INFO L93 Difference]: Finished difference Result 21028 states and 26129 transitions. [2022-07-13 21:12:24,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-13 21:12:24,351 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 84 [2022-07-13 21:12:24,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:12:24,404 INFO L225 Difference]: With dead ends: 21028 [2022-07-13 21:12:24,405 INFO L226 Difference]: Without dead ends: 14185 [2022-07-13 21:12:24,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2022-07-13 21:12:24,424 INFO L413 NwaCegarLoop]: 631 mSDtfsCounter, 1475 mSDsluCounter, 1163 mSDsCounter, 0 mSdLazyCounter, 998 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1491 SdHoareTripleChecker+Valid, 1794 SdHoareTripleChecker+Invalid, 1330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-13 21:12:24,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1491 Valid, 1794 Invalid, 1330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 998 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-13 21:12:24,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14185 states. [2022-07-13 21:12:25,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14185 to 13326. [2022-07-13 21:12:25,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13326 states, 10274 states have (on average 1.208974109402375) internal successors, (12421), 10448 states have internal predecessors, (12421), 1498 states have call successors, (1498), 1260 states have call predecessors, (1498), 1552 states have return successors, (2599), 1630 states have call predecessors, (2599), 1495 states have call successors, (2599) [2022-07-13 21:12:25,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13326 states to 13326 states and 16518 transitions. [2022-07-13 21:12:25,173 INFO L78 Accepts]: Start accepts. Automaton has 13326 states and 16518 transitions. Word has length 84 [2022-07-13 21:12:25,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:12:25,173 INFO L495 AbstractCegarLoop]: Abstraction has 13326 states and 16518 transitions. [2022-07-13 21:12:25,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-13 21:12:25,174 INFO L276 IsEmpty]: Start isEmpty. Operand 13326 states and 16518 transitions. [2022-07-13 21:12:25,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-13 21:12:25,180 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:12:25,180 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:12:25,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-13 21:12:25,180 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:12:25,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:12:25,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1418215744, now seen corresponding path program 1 times [2022-07-13 21:12:25,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:12:25,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074735544] [2022-07-13 21:12:25,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:12:25,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:12:25,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:25,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:12:25,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:25,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 21:12:25,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:25,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-13 21:12:25,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:25,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 21:12:25,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:25,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 21:12:25,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:25,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 21:12:25,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:25,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-13 21:12:25,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:25,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-13 21:12:25,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:25,269 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 21:12:25,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:12:25,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074735544] [2022-07-13 21:12:25,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074735544] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:12:25,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:12:25,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-13 21:12:25,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560088219] [2022-07-13 21:12:25,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:12:25,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 21:12:25,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:12:25,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 21:12:25,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-07-13 21:12:25,272 INFO L87 Difference]: Start difference. First operand 13326 states and 16518 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) [2022-07-13 21:12:26,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:12:26,936 INFO L93 Difference]: Finished difference Result 24200 states and 29837 transitions. [2022-07-13 21:12:26,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-13 21:12:26,936 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 93 [2022-07-13 21:12:26,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:12:26,984 INFO L225 Difference]: With dead ends: 24200 [2022-07-13 21:12:26,984 INFO L226 Difference]: Without dead ends: 11801 [2022-07-13 21:12:27,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2022-07-13 21:12:27,020 INFO L413 NwaCegarLoop]: 610 mSDtfsCounter, 2042 mSDsluCounter, 1489 mSDsCounter, 0 mSdLazyCounter, 1295 mSolverCounterSat, 405 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2084 SdHoareTripleChecker+Valid, 2099 SdHoareTripleChecker+Invalid, 1700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 405 IncrementalHoareTripleChecker+Valid, 1295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-13 21:12:27,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2084 Valid, 2099 Invalid, 1700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [405 Valid, 1295 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-13 21:12:27,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11801 states. [2022-07-13 21:12:27,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11801 to 10901. [2022-07-13 21:12:27,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10901 states, 8440 states have (on average 1.2004739336492891) internal successors, (10132), 8581 states have internal predecessors, (10132), 1199 states have call successors, (1199), 1009 states have call predecessors, (1199), 1260 states have return successors, (1931), 1320 states have call predecessors, (1931), 1196 states have call successors, (1931) [2022-07-13 21:12:27,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10901 states to 10901 states and 13262 transitions. [2022-07-13 21:12:27,801 INFO L78 Accepts]: Start accepts. Automaton has 10901 states and 13262 transitions. Word has length 93 [2022-07-13 21:12:27,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:12:27,802 INFO L495 AbstractCegarLoop]: Abstraction has 10901 states and 13262 transitions. [2022-07-13 21:12:27,802 INFO L496 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) [2022-07-13 21:12:27,802 INFO L276 IsEmpty]: Start isEmpty. Operand 10901 states and 13262 transitions. [2022-07-13 21:12:27,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-07-13 21:12:27,817 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:12:27,817 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 21:12:27,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-13 21:12:27,818 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:12:27,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:12:27,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1086528831, now seen corresponding path program 1 times [2022-07-13 21:12:27,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:12:27,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711889675] [2022-07-13 21:12:27,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:12:27,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:12:27,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:27,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:12:27,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:27,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 21:12:27,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:27,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-13 21:12:27,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:27,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 21:12:27,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:27,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 21:12:27,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:27,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 21:12:27,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:27,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-13 21:12:27,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:27,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-13 21:12:27,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:27,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-13 21:12:27,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:27,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-07-13 21:12:27,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:27,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-07-13 21:12:27,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:27,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-13 21:12:27,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:27,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 21:12:27,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:27,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-07-13 21:12:27,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:27,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-13 21:12:27,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:27,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-07-13 21:12:27,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:27,938 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-13 21:12:27,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:12:27,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711889675] [2022-07-13 21:12:27,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711889675] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 21:12:27,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684723771] [2022-07-13 21:12:27,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:12:27,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 21:12:27,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 21:12:27,944 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 21:12:27,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 21:12:28,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:28,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-13 21:12:28,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 21:12:28,129 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 21:12:28,129 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 21:12:28,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684723771] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:12:28,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 21:12:28,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 12 [2022-07-13 21:12:28,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681265780] [2022-07-13 21:12:28,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:12:28,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 21:12:28,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:12:28,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 21:12:28,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-07-13 21:12:28,134 INFO L87 Difference]: Start difference. First operand 10901 states and 13262 transitions. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-07-13 21:12:28,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:12:28,454 INFO L93 Difference]: Finished difference Result 16049 states and 19482 transitions. [2022-07-13 21:12:28,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 21:12:28,455 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 145 [2022-07-13 21:12:28,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:12:28,476 INFO L225 Difference]: With dead ends: 16049 [2022-07-13 21:12:28,476 INFO L226 Difference]: Without dead ends: 5467 [2022-07-13 21:12:28,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-07-13 21:12:28,501 INFO L413 NwaCegarLoop]: 573 mSDtfsCounter, 34 mSDsluCounter, 2252 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 2825 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 21:12:28,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 2825 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 21:12:28,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5467 states. [2022-07-13 21:12:28,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5467 to 5025. [2022-07-13 21:12:28,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5025 states, 4005 states have (on average 1.1980024968789014) internal successors, (4798), 4044 states have internal predecessors, (4798), 501 states have call successors, (501), 403 states have call predecessors, (501), 517 states have return successors, (771), 578 states have call predecessors, (771), 498 states have call successors, (771) [2022-07-13 21:12:28,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5025 states to 5025 states and 6070 transitions. [2022-07-13 21:12:28,889 INFO L78 Accepts]: Start accepts. Automaton has 5025 states and 6070 transitions. Word has length 145 [2022-07-13 21:12:28,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:12:28,889 INFO L495 AbstractCegarLoop]: Abstraction has 5025 states and 6070 transitions. [2022-07-13 21:12:28,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2022-07-13 21:12:28,890 INFO L276 IsEmpty]: Start isEmpty. Operand 5025 states and 6070 transitions. [2022-07-13 21:12:28,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-13 21:12:28,899 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:12:28,899 INFO L195 NwaCegarLoop]: 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] [2022-07-13 21:12:28,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 21:12:29,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-13 21:12:29,116 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:12:29,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:12:29,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1051309190, now seen corresponding path program 1 times [2022-07-13 21:12:29,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:12:29,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849410000] [2022-07-13 21:12:29,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:12:29,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:12:29,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:29,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:12:29,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:29,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 21:12:29,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:29,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 21:12:29,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:29,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-13 21:12:29,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:29,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-07-13 21:12:29,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:29,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:12:29,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:12:29,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849410000] [2022-07-13 21:12:29,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849410000] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:12:29,217 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:12:29,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 21:12:29,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226682738] [2022-07-13 21:12:29,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:12:29,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 21:12:29,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:12:29,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 21:12:29,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-13 21:12:29,219 INFO L87 Difference]: Start difference. First operand 5025 states and 6070 transitions. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 3 states have internal predecessors, (124), 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) [2022-07-13 21:12:30,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:12:30,430 INFO L93 Difference]: Finished difference Result 5396 states and 6664 transitions. [2022-07-13 21:12:30,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 21:12:30,430 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 3 states have internal predecessors, (124), 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 135 [2022-07-13 21:12:30,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:12:30,445 INFO L225 Difference]: With dead ends: 5396 [2022-07-13 21:12:30,445 INFO L226 Difference]: Without dead ends: 5123 [2022-07-13 21:12:30,448 INFO L412 NwaCegarLoop]: 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 [2022-07-13 21:12:30,449 INFO L413 NwaCegarLoop]: 612 mSDtfsCounter, 841 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 861 SdHoareTripleChecker+Valid, 1088 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-13 21:12:30,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [861 Valid, 1088 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-13 21:12:30,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5123 states. [2022-07-13 21:12:30,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5123 to 5025. [2022-07-13 21:12:30,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5025 states, 4005 states have (on average 1.1977528089887641) internal successors, (4797), 4044 states have internal predecessors, (4797), 501 states have call successors, (501), 403 states have call predecessors, (501), 517 states have return successors, (771), 578 states have call predecessors, (771), 498 states have call successors, (771) [2022-07-13 21:12:30,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5025 states to 5025 states and 6069 transitions. [2022-07-13 21:12:30,803 INFO L78 Accepts]: Start accepts. Automaton has 5025 states and 6069 transitions. Word has length 135 [2022-07-13 21:12:30,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:12:30,803 INFO L495 AbstractCegarLoop]: Abstraction has 5025 states and 6069 transitions. [2022-07-13 21:12:30,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 3 states have internal predecessors, (124), 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) [2022-07-13 21:12:30,803 INFO L276 IsEmpty]: Start isEmpty. Operand 5025 states and 6069 transitions. [2022-07-13 21:12:30,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-13 21:12:30,811 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:12:30,812 INFO L195 NwaCegarLoop]: 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] [2022-07-13 21:12:30,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-13 21:12:30,812 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:12:30,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:12:30,813 INFO L85 PathProgramCache]: Analyzing trace with hash 999099708, now seen corresponding path program 1 times [2022-07-13 21:12:30,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:12:30,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170587867] [2022-07-13 21:12:30,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:12:30,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:12:30,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:30,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:12:30,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:30,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 21:12:30,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:30,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 21:12:30,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:30,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-13 21:12:30,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:30,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-07-13 21:12:30,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:30,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:12:30,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:12:30,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170587867] [2022-07-13 21:12:30,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170587867] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:12:30,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:12:30,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 21:12:30,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365393747] [2022-07-13 21:12:30,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:12:30,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 21:12:30,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:12:30,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 21:12:30,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 21:12:30,921 INFO L87 Difference]: Start difference. First operand 5025 states and 6069 transitions. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 4 states have internal predecessors, (124), 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) [2022-07-13 21:12:33,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:12:33,018 INFO L93 Difference]: Finished difference Result 5767 states and 7260 transitions. [2022-07-13 21:12:33,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 21:12:33,019 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 4 states have internal predecessors, (124), 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 135 [2022-07-13 21:12:33,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:12:33,037 INFO L225 Difference]: With dead ends: 5767 [2022-07-13 21:12:33,037 INFO L226 Difference]: Without dead ends: 5499 [2022-07-13 21:12:33,041 INFO L412 NwaCegarLoop]: 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 [2022-07-13 21:12:33,041 INFO L413 NwaCegarLoop]: 638 mSDtfsCounter, 1326 mSDsluCounter, 892 mSDsCounter, 0 mSdLazyCounter, 1543 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1351 SdHoareTripleChecker+Valid, 1530 SdHoareTripleChecker+Invalid, 1685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-13 21:12:33,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1351 Valid, 1530 Invalid, 1685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 1543 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-13 21:12:33,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5499 states. [2022-07-13 21:12:33,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5499 to 5302. [2022-07-13 21:12:33,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5302 states, 4258 states have (on average 1.2209957726632221) internal successors, (5199), 4298 states have internal predecessors, (5199), 518 states have call successors, (518), 409 states have call predecessors, (518), 524 states have return successors, (791), 595 states have call predecessors, (791), 515 states have call successors, (791) [2022-07-13 21:12:33,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5302 states to 5302 states and 6508 transitions. [2022-07-13 21:12:33,407 INFO L78 Accepts]: Start accepts. Automaton has 5302 states and 6508 transitions. Word has length 135 [2022-07-13 21:12:33,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:12:33,408 INFO L495 AbstractCegarLoop]: Abstraction has 5302 states and 6508 transitions. [2022-07-13 21:12:33,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 4 states have internal predecessors, (124), 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) [2022-07-13 21:12:33,409 INFO L276 IsEmpty]: Start isEmpty. Operand 5302 states and 6508 transitions. [2022-07-13 21:12:33,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-13 21:12:33,418 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:12:33,418 INFO L195 NwaCegarLoop]: 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] [2022-07-13 21:12:33,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-13 21:12:33,418 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:12:33,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:12:33,419 INFO L85 PathProgramCache]: Analyzing trace with hash -362902728, now seen corresponding path program 1 times [2022-07-13 21:12:33,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:12:33,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137314566] [2022-07-13 21:12:33,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:12:33,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:12:33,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:33,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:12:33,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:33,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 21:12:33,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:33,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 21:12:33,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:33,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-13 21:12:33,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:33,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-07-13 21:12:33,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:33,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:12:33,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:12:33,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137314566] [2022-07-13 21:12:33,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137314566] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:12:33,521 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:12:33,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:12:33,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676559640] [2022-07-13 21:12:33,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:12:33,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:12:33,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:12:33,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:12:33,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:12:33,523 INFO L87 Difference]: Start difference. First operand 5302 states and 6508 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2022-07-13 21:12:35,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:12:35,920 INFO L93 Difference]: Finished difference Result 6430 states and 8318 transitions. [2022-07-13 21:12:35,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 21:12:35,921 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 135 [2022-07-13 21:12:35,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:12:35,936 INFO L225 Difference]: With dead ends: 6430 [2022-07-13 21:12:35,936 INFO L226 Difference]: Without dead ends: 5885 [2022-07-13 21:12:35,940 INFO L412 NwaCegarLoop]: 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 [2022-07-13 21:12:35,940 INFO L413 NwaCegarLoop]: 863 mSDtfsCounter, 1337 mSDsluCounter, 1659 mSDsCounter, 0 mSdLazyCounter, 2421 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1362 SdHoareTripleChecker+Valid, 2522 SdHoareTripleChecker+Invalid, 2526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 2421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-13 21:12:35,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1362 Valid, 2522 Invalid, 2526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 2421 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-13 21:12:35,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5885 states. [2022-07-13 21:12:36,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5885 to 5560. [2022-07-13 21:12:36,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5560 states, 4492 states have (on average 1.2384238646482635) internal successors, (5563), 4533 states have internal predecessors, (5563), 535 states have call successors, (535), 415 states have call predecessors, (535), 531 states have return successors, (810), 613 states have call predecessors, (810), 532 states have call successors, (810) [2022-07-13 21:12:36,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5560 states to 5560 states and 6908 transitions. [2022-07-13 21:12:36,309 INFO L78 Accepts]: Start accepts. Automaton has 5560 states and 6908 transitions. Word has length 135 [2022-07-13 21:12:36,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:12:36,309 INFO L495 AbstractCegarLoop]: Abstraction has 5560 states and 6908 transitions. [2022-07-13 21:12:36,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2022-07-13 21:12:36,309 INFO L276 IsEmpty]: Start isEmpty. Operand 5560 states and 6908 transitions. [2022-07-13 21:12:36,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-13 21:12:36,317 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:12:36,317 INFO L195 NwaCegarLoop]: 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] [2022-07-13 21:12:36,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-13 21:12:36,318 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:12:36,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:12:36,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1566029498, now seen corresponding path program 1 times [2022-07-13 21:12:36,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:12:36,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576936492] [2022-07-13 21:12:36,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:12:36,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:12:36,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:36,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:12:36,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:36,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 21:12:36,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:36,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 21:12:36,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:36,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-13 21:12:36,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:36,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-07-13 21:12:36,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:36,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:12:36,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:12:36,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576936492] [2022-07-13 21:12:36,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576936492] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:12:36,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:12:36,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:12:36,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140999973] [2022-07-13 21:12:36,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:12:36,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:12:36,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:12:36,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:12:36,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:12:36,437 INFO L87 Difference]: Start difference. First operand 5560 states and 6908 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2022-07-13 21:12:38,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:12:38,845 INFO L93 Difference]: Finished difference Result 7407 states and 9866 transitions. [2022-07-13 21:12:38,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 21:12:38,845 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 135 [2022-07-13 21:12:38,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:12:38,873 INFO L225 Difference]: With dead ends: 7407 [2022-07-13 21:12:38,873 INFO L226 Difference]: Without dead ends: 6604 [2022-07-13 21:12:38,880 INFO L412 NwaCegarLoop]: 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 [2022-07-13 21:12:38,880 INFO L413 NwaCegarLoop]: 853 mSDtfsCounter, 1337 mSDsluCounter, 1659 mSDsCounter, 0 mSdLazyCounter, 2420 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1362 SdHoareTripleChecker+Valid, 2512 SdHoareTripleChecker+Invalid, 2531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 2420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-13 21:12:38,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1362 Valid, 2512 Invalid, 2531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 2420 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-13 21:12:38,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6604 states. [2022-07-13 21:12:39,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6604 to 6077. [2022-07-13 21:12:39,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6077 states, 4961 states have (on average 1.2682926829268293) internal successors, (6292), 5004 states have internal predecessors, (6292), 569 states have call successors, (569), 427 states have call predecessors, (569), 545 states have return successors, (852), 649 states have call predecessors, (852), 566 states have call successors, (852) [2022-07-13 21:12:39,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6077 states to 6077 states and 7713 transitions. [2022-07-13 21:12:39,394 INFO L78 Accepts]: Start accepts. Automaton has 6077 states and 7713 transitions. Word has length 135 [2022-07-13 21:12:39,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:12:39,395 INFO L495 AbstractCegarLoop]: Abstraction has 6077 states and 7713 transitions. [2022-07-13 21:12:39,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2022-07-13 21:12:39,395 INFO L276 IsEmpty]: Start isEmpty. Operand 6077 states and 7713 transitions. [2022-07-13 21:12:39,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-13 21:12:39,404 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:12:39,404 INFO L195 NwaCegarLoop]: 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] [2022-07-13 21:12:39,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-13 21:12:39,404 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:12:39,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:12:39,405 INFO L85 PathProgramCache]: Analyzing trace with hash -727051528, now seen corresponding path program 1 times [2022-07-13 21:12:39,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:12:39,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279438508] [2022-07-13 21:12:39,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:12:39,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:12:39,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:39,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:12:39,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:39,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 21:12:39,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:39,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 21:12:39,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:39,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-13 21:12:39,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:39,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-07-13 21:12:39,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:39,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:12:39,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:12:39,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279438508] [2022-07-13 21:12:39,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279438508] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:12:39,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:12:39,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:12:39,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901674441] [2022-07-13 21:12:39,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:12:39,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:12:39,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:12:39,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:12:39,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:12:39,540 INFO L87 Difference]: Start difference. First operand 6077 states and 7713 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2022-07-13 21:12:42,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:12:42,167 INFO L93 Difference]: Finished difference Result 9285 states and 12827 transitions. [2022-07-13 21:12:42,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 21:12:42,167 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 135 [2022-07-13 21:12:42,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:12:42,195 INFO L225 Difference]: With dead ends: 9285 [2022-07-13 21:12:42,195 INFO L226 Difference]: Without dead ends: 7965 [2022-07-13 21:12:42,203 INFO L412 NwaCegarLoop]: 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 [2022-07-13 21:12:42,204 INFO L413 NwaCegarLoop]: 845 mSDtfsCounter, 1332 mSDsluCounter, 1659 mSDsCounter, 0 mSdLazyCounter, 2400 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1357 SdHoareTripleChecker+Valid, 2504 SdHoareTripleChecker+Invalid, 2512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 2400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-13 21:12:42,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1357 Valid, 2504 Invalid, 2512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 2400 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-13 21:12:42,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7965 states. [2022-07-13 21:12:42,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7965 to 7117. [2022-07-13 21:12:42,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7117 states, 5905 states have (on average 1.3141405588484336) internal successors, (7760), 5952 states have internal predecessors, (7760), 637 states have call successors, (637), 451 states have call predecessors, (637), 573 states have return successors, (942), 721 states have call predecessors, (942), 634 states have call successors, (942) [2022-07-13 21:12:42,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7117 states to 7117 states and 9339 transitions. [2022-07-13 21:12:42,796 INFO L78 Accepts]: Start accepts. Automaton has 7117 states and 9339 transitions. Word has length 135 [2022-07-13 21:12:42,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:12:42,796 INFO L495 AbstractCegarLoop]: Abstraction has 7117 states and 9339 transitions. [2022-07-13 21:12:42,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2022-07-13 21:12:42,797 INFO L276 IsEmpty]: Start isEmpty. Operand 7117 states and 9339 transitions. [2022-07-13 21:12:42,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-13 21:12:42,804 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:12:42,804 INFO L195 NwaCegarLoop]: 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] [2022-07-13 21:12:42,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-13 21:12:42,805 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:12:42,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:12:42,805 INFO L85 PathProgramCache]: Analyzing trace with hash -255695178, now seen corresponding path program 1 times [2022-07-13 21:12:42,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:12:42,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633392414] [2022-07-13 21:12:42,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:12:42,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:12:42,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:42,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:12:42,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:42,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 21:12:42,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:42,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 21:12:42,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:42,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-13 21:12:42,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:42,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-07-13 21:12:42,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:42,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:12:42,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:12:42,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633392414] [2022-07-13 21:12:42,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633392414] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:12:42,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:12:42,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:12:42,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945200695] [2022-07-13 21:12:42,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:12:42,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:12:42,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:12:42,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:12:42,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:12:42,903 INFO L87 Difference]: Start difference. First operand 7117 states and 9339 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2022-07-13 21:12:44,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:12:44,274 INFO L93 Difference]: Finished difference Result 10338 states and 14504 transitions. [2022-07-13 21:12:44,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 21:12:44,274 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 135 [2022-07-13 21:12:44,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:12:44,298 INFO L225 Difference]: With dead ends: 10338 [2022-07-13 21:12:44,299 INFO L226 Difference]: Without dead ends: 7978 [2022-07-13 21:12:44,308 INFO L412 NwaCegarLoop]: 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 [2022-07-13 21:12:44,308 INFO L413 NwaCegarLoop]: 576 mSDtfsCounter, 1194 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1220 SdHoareTripleChecker+Valid, 1298 SdHoareTripleChecker+Invalid, 1195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-13 21:12:44,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1220 Valid, 1298 Invalid, 1195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1041 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-13 21:12:44,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7978 states. [2022-07-13 21:12:44,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7978 to 7117. [2022-07-13 21:12:44,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7117 states, 5905 states have (on average 1.3126164267569855) internal successors, (7751), 5952 states have internal predecessors, (7751), 637 states have call successors, (637), 451 states have call predecessors, (637), 573 states have return successors, (942), 721 states have call predecessors, (942), 634 states have call successors, (942) [2022-07-13 21:12:44,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7117 states to 7117 states and 9330 transitions. [2022-07-13 21:12:44,709 INFO L78 Accepts]: Start accepts. Automaton has 7117 states and 9330 transitions. Word has length 135 [2022-07-13 21:12:44,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:12:44,709 INFO L495 AbstractCegarLoop]: Abstraction has 7117 states and 9330 transitions. [2022-07-13 21:12:44,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2022-07-13 21:12:44,709 INFO L276 IsEmpty]: Start isEmpty. Operand 7117 states and 9330 transitions. [2022-07-13 21:12:44,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-13 21:12:44,717 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:12:44,717 INFO L195 NwaCegarLoop]: 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] [2022-07-13 21:12:44,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-13 21:12:44,718 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:12:44,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:12:44,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1903058120, now seen corresponding path program 1 times [2022-07-13 21:12:44,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:12:44,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597765174] [2022-07-13 21:12:44,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:12:44,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:12:44,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:44,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:12:44,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:44,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 21:12:44,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:44,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 21:12:44,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:44,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-13 21:12:44,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:44,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-07-13 21:12:44,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:44,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:12:44,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:12:44,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597765174] [2022-07-13 21:12:44,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597765174] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:12:44,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:12:44,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:12:44,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304075437] [2022-07-13 21:12:44,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:12:44,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:12:44,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:12:44,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:12:44,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:12:44,810 INFO L87 Difference]: Start difference. First operand 7117 states and 9330 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2022-07-13 21:12:46,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:12:46,029 INFO L93 Difference]: Finished difference Result 10328 states and 14457 transitions. [2022-07-13 21:12:46,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 21:12:46,029 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 135 [2022-07-13 21:12:46,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:12:46,051 INFO L225 Difference]: With dead ends: 10328 [2022-07-13 21:12:46,052 INFO L226 Difference]: Without dead ends: 7968 [2022-07-13 21:12:46,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-13 21:12:46,061 INFO L413 NwaCegarLoop]: 572 mSDtfsCounter, 1192 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 1031 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1218 SdHoareTripleChecker+Valid, 1294 SdHoareTripleChecker+Invalid, 1185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 21:12:46,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1218 Valid, 1294 Invalid, 1185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1031 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 21:12:46,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7968 states. [2022-07-13 21:12:46,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7968 to 7117. [2022-07-13 21:12:46,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7117 states, 5905 states have (on average 1.3110922946655377) internal successors, (7742), 5952 states have internal predecessors, (7742), 637 states have call successors, (637), 451 states have call predecessors, (637), 573 states have return successors, (942), 721 states have call predecessors, (942), 634 states have call successors, (942) [2022-07-13 21:12:46,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7117 states to 7117 states and 9321 transitions. [2022-07-13 21:12:46,582 INFO L78 Accepts]: Start accepts. Automaton has 7117 states and 9321 transitions. Word has length 135 [2022-07-13 21:12:46,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:12:46,582 INFO L495 AbstractCegarLoop]: Abstraction has 7117 states and 9321 transitions. [2022-07-13 21:12:46,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2022-07-13 21:12:46,583 INFO L276 IsEmpty]: Start isEmpty. Operand 7117 states and 9321 transitions. [2022-07-13 21:12:46,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-13 21:12:46,590 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:12:46,590 INFO L195 NwaCegarLoop]: 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] [2022-07-13 21:12:46,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-13 21:12:46,591 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:12:46,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:12:46,591 INFO L85 PathProgramCache]: Analyzing trace with hash 260558454, now seen corresponding path program 1 times [2022-07-13 21:12:46,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:12:46,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741805467] [2022-07-13 21:12:46,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:12:46,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:12:46,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:46,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:12:46,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:46,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 21:12:46,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:46,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 21:12:46,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:46,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-13 21:12:46,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:46,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-07-13 21:12:46,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:46,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:12:46,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:12:46,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741805467] [2022-07-13 21:12:46,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741805467] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:12:46,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:12:46,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:12:46,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922583231] [2022-07-13 21:12:46,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:12:46,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:12:46,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:12:46,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:12:46,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:12:46,692 INFO L87 Difference]: Start difference. First operand 7117 states and 9321 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2022-07-13 21:12:48,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:12:48,037 INFO L93 Difference]: Finished difference Result 10318 states and 14410 transitions. [2022-07-13 21:12:48,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 21:12:48,037 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 135 [2022-07-13 21:12:48,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:12:48,065 INFO L225 Difference]: With dead ends: 10318 [2022-07-13 21:12:48,065 INFO L226 Difference]: Without dead ends: 7958 [2022-07-13 21:12:48,074 INFO L412 NwaCegarLoop]: 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 [2022-07-13 21:12:48,075 INFO L413 NwaCegarLoop]: 546 mSDtfsCounter, 1232 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 997 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1258 SdHoareTripleChecker+Valid, 1268 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-13 21:12:48,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1258 Valid, 1268 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 997 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-13 21:12:48,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7958 states. [2022-07-13 21:12:48,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7958 to 7117. [2022-07-13 21:12:48,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7117 states, 5905 states have (on average 1.3095681625740898) internal successors, (7733), 5952 states have internal predecessors, (7733), 637 states have call successors, (637), 451 states have call predecessors, (637), 573 states have return successors, (942), 721 states have call predecessors, (942), 634 states have call successors, (942) [2022-07-13 21:12:48,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7117 states to 7117 states and 9312 transitions. [2022-07-13 21:12:48,585 INFO L78 Accepts]: Start accepts. Automaton has 7117 states and 9312 transitions. Word has length 135 [2022-07-13 21:12:48,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:12:48,585 INFO L495 AbstractCegarLoop]: Abstraction has 7117 states and 9312 transitions. [2022-07-13 21:12:48,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2022-07-13 21:12:48,585 INFO L276 IsEmpty]: Start isEmpty. Operand 7117 states and 9312 transitions. [2022-07-13 21:12:48,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-13 21:12:48,593 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:12:48,593 INFO L195 NwaCegarLoop]: 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] [2022-07-13 21:12:48,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-13 21:12:48,593 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:12:48,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:12:48,594 INFO L85 PathProgramCache]: Analyzing trace with hash -778026120, now seen corresponding path program 1 times [2022-07-13 21:12:48,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:12:48,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148676547] [2022-07-13 21:12:48,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:12:48,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:12:48,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:48,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:12:48,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:48,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 21:12:48,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:48,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 21:12:48,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:48,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-13 21:12:48,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:48,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-07-13 21:12:48,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:48,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:12:48,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:12:48,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148676547] [2022-07-13 21:12:48,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148676547] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:12:48,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:12:48,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:12:48,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11406836] [2022-07-13 21:12:48,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:12:48,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:12:48,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:12:48,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:12:48,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:12:48,688 INFO L87 Difference]: Start difference. First operand 7117 states and 9312 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2022-07-13 21:12:51,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:12:51,143 INFO L93 Difference]: Finished difference Result 13021 states and 18591 transitions. [2022-07-13 21:12:51,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 21:12:51,144 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 135 [2022-07-13 21:12:51,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:12:51,177 INFO L225 Difference]: With dead ends: 13021 [2022-07-13 21:12:51,177 INFO L226 Difference]: Without dead ends: 10661 [2022-07-13 21:12:51,188 INFO L412 NwaCegarLoop]: 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 [2022-07-13 21:12:51,189 INFO L413 NwaCegarLoop]: 822 mSDtfsCounter, 1310 mSDsluCounter, 1659 mSDsCounter, 0 mSdLazyCounter, 2335 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1335 SdHoareTripleChecker+Valid, 2481 SdHoareTripleChecker+Invalid, 2447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 2335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-13 21:12:51,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1335 Valid, 2481 Invalid, 2447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 2335 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-13 21:12:51,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10661 states. [2022-07-13 21:12:51,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10661 to 9229. [2022-07-13 21:12:51,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9229 states, 7825 states have (on average 1.3649840255591055) internal successors, (10681), 7880 states have internal predecessors, (10681), 773 states have call successors, (773), 499 states have call predecessors, (773), 629 states have return successors, (1140), 865 states have call predecessors, (1140), 770 states have call successors, (1140) [2022-07-13 21:12:51,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9229 states to 9229 states and 12594 transitions. [2022-07-13 21:12:51,796 INFO L78 Accepts]: Start accepts. Automaton has 9229 states and 12594 transitions. Word has length 135 [2022-07-13 21:12:51,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:12:51,796 INFO L495 AbstractCegarLoop]: Abstraction has 9229 states and 12594 transitions. [2022-07-13 21:12:51,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2022-07-13 21:12:51,797 INFO L276 IsEmpty]: Start isEmpty. Operand 9229 states and 12594 transitions. [2022-07-13 21:12:51,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-13 21:12:51,805 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:12:51,805 INFO L195 NwaCegarLoop]: 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] [2022-07-13 21:12:51,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-13 21:12:51,806 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:12:51,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:12:51,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1543775798, now seen corresponding path program 1 times [2022-07-13 21:12:51,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:12:51,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844898689] [2022-07-13 21:12:51,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:12:51,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:12:51,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:51,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:12:51,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:51,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 21:12:51,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:51,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 21:12:51,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:51,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-13 21:12:51,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:51,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-07-13 21:12:51,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:51,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:12:51,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:12:51,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844898689] [2022-07-13 21:12:51,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844898689] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:12:51,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:12:51,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:12:51,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998276693] [2022-07-13 21:12:51,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:12:51,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:12:51,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:12:51,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:12:51,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:12:51,910 INFO L87 Difference]: Start difference. First operand 9229 states and 12594 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2022-07-13 21:12:55,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:12:55,274 INFO L93 Difference]: Finished difference Result 22491 states and 33369 transitions. [2022-07-13 21:12:55,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 21:12:55,275 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 135 [2022-07-13 21:12:55,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:12:55,313 INFO L225 Difference]: With dead ends: 22491 [2022-07-13 21:12:55,313 INFO L226 Difference]: Without dead ends: 18019 [2022-07-13 21:12:55,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-13 21:12:55,323 INFO L413 NwaCegarLoop]: 951 mSDtfsCounter, 1392 mSDsluCounter, 1651 mSDsCounter, 0 mSdLazyCounter, 2716 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1416 SdHoareTripleChecker+Valid, 2602 SdHoareTripleChecker+Invalid, 2830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 2716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-13 21:12:55,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1416 Valid, 2602 Invalid, 2830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 2716 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-13 21:12:55,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18019 states. [2022-07-13 21:12:56,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18019 to 13414. [2022-07-13 21:12:56,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13414 states, 11642 states have (on average 1.4220065280879575) internal successors, (16555), 11713 states have internal predecessors, (16555), 1029 states have call successors, (1029), 595 states have call predecessors, (1029), 741 states have return successors, (1574), 1137 states have call predecessors, (1574), 1026 states have call successors, (1574) [2022-07-13 21:12:56,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13414 states to 13414 states and 19158 transitions. [2022-07-13 21:12:56,129 INFO L78 Accepts]: Start accepts. Automaton has 13414 states and 19158 transitions. Word has length 135 [2022-07-13 21:12:56,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:12:56,129 INFO L495 AbstractCegarLoop]: Abstraction has 13414 states and 19158 transitions. [2022-07-13 21:12:56,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2022-07-13 21:12:56,130 INFO L276 IsEmpty]: Start isEmpty. Operand 13414 states and 19158 transitions. [2022-07-13 21:12:56,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-13 21:12:56,141 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:12:56,141 INFO L195 NwaCegarLoop]: 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] [2022-07-13 21:12:56,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-13 21:12:56,142 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:12:56,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:12:56,142 INFO L85 PathProgramCache]: Analyzing trace with hash -598084680, now seen corresponding path program 1 times [2022-07-13 21:12:56,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:12:56,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862336683] [2022-07-13 21:12:56,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:12:56,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:12:56,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:56,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:12:56,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:56,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 21:12:56,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:56,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 21:12:56,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:56,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-13 21:12:56,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:56,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-07-13 21:12:56,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:12:56,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:12:56,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:12:56,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862336683] [2022-07-13 21:12:56,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862336683] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:12:56,251 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:12:56,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:12:56,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409663551] [2022-07-13 21:12:56,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:12:56,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:12:56,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:12:56,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:12:56,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:12:56,253 INFO L87 Difference]: Start difference. First operand 13414 states and 19158 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2022-07-13 21:13:00,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:13:00,657 INFO L93 Difference]: Finished difference Result 38962 states and 59359 transitions. [2022-07-13 21:13:00,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 21:13:00,657 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 135 [2022-07-13 21:13:00,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:13:00,727 INFO L225 Difference]: With dead ends: 38962 [2022-07-13 21:13:00,727 INFO L226 Difference]: Without dead ends: 30305 [2022-07-13 21:13:00,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-13 21:13:00,766 INFO L413 NwaCegarLoop]: 807 mSDtfsCounter, 1601 mSDsluCounter, 1648 mSDsCounter, 0 mSdLazyCounter, 2308 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1635 SdHoareTripleChecker+Valid, 2455 SdHoareTripleChecker+Invalid, 2428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 2308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-13 21:13:00,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1635 Valid, 2455 Invalid, 2428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 2308 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-13 21:13:00,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30305 states. [2022-07-13 21:13:02,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30305 to 21447. [2022-07-13 21:13:02,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21447 states, 18955 states have (on average 1.4635188604589817) internal successors, (27741), 19058 states have internal predecessors, (27741), 1525 states have call successors, (1525), 787 states have call predecessors, (1525), 965 states have return successors, (2588), 1665 states have call predecessors, (2588), 1522 states have call successors, (2588) [2022-07-13 21:13:02,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21447 states to 21447 states and 31854 transitions. [2022-07-13 21:13:02,288 INFO L78 Accepts]: Start accepts. Automaton has 21447 states and 31854 transitions. Word has length 135 [2022-07-13 21:13:02,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:13:02,288 INFO L495 AbstractCegarLoop]: Abstraction has 21447 states and 31854 transitions. [2022-07-13 21:13:02,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2022-07-13 21:13:02,289 INFO L276 IsEmpty]: Start isEmpty. Operand 21447 states and 31854 transitions. [2022-07-13 21:13:02,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-13 21:13:02,369 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:13:02,369 INFO L195 NwaCegarLoop]: 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] [2022-07-13 21:13:02,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-13 21:13:02,369 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:13:02,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:13:02,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1221366282, now seen corresponding path program 1 times [2022-07-13 21:13:02,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:13:02,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392152646] [2022-07-13 21:13:02,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:13:02,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:13:02,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:13:02,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:13:02,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:13:02,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 21:13:02,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:13:02,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 21:13:02,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:13:02,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-13 21:13:02,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:13:02,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-07-13 21:13:02,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:13:02,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:13:02,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:13:02,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392152646] [2022-07-13 21:13:02,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392152646] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:13:02,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:13:02,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:13:02,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429461908] [2022-07-13 21:13:02,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:13:02,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:13:02,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:13:02,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:13:02,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:13:02,467 INFO L87 Difference]: Start difference. First operand 21447 states and 31854 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2022-07-13 21:13:08,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:13:08,922 INFO L93 Difference]: Finished difference Result 69391 states and 107873 transitions. [2022-07-13 21:13:08,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 21:13:08,923 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 135 [2022-07-13 21:13:08,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:13:09,083 INFO L225 Difference]: With dead ends: 69391 [2022-07-13 21:13:09,084 INFO L226 Difference]: Without dead ends: 52701 [2022-07-13 21:13:09,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-13 21:13:09,126 INFO L413 NwaCegarLoop]: 799 mSDtfsCounter, 1519 mSDsluCounter, 1651 mSDsCounter, 0 mSdLazyCounter, 2291 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1553 SdHoareTripleChecker+Valid, 2450 SdHoareTripleChecker+Invalid, 2411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 2291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-13 21:13:09,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1553 Valid, 2450 Invalid, 2411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 2291 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-13 21:13:09,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52701 states. [2022-07-13 21:13:12,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52701 to 37865. [2022-07-13 21:13:12,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37865 states, 33965 states have (on average 1.497099955836891) internal successors, (50849), 34132 states have internal predecessors, (50849), 2485 states have call successors, (2485), 1171 states have call predecessors, (2485), 1413 states have return successors, (5070), 2689 states have call predecessors, (5070), 2482 states have call successors, (5070) [2022-07-13 21:13:12,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37865 states to 37865 states and 58404 transitions. [2022-07-13 21:13:12,127 INFO L78 Accepts]: Start accepts. Automaton has 37865 states and 58404 transitions. Word has length 135 [2022-07-13 21:13:12,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:13:12,127 INFO L495 AbstractCegarLoop]: Abstraction has 37865 states and 58404 transitions. [2022-07-13 21:13:12,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2022-07-13 21:13:12,127 INFO L276 IsEmpty]: Start isEmpty. Operand 37865 states and 58404 transitions. [2022-07-13 21:13:12,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-13 21:13:12,144 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:13:12,144 INFO L195 NwaCegarLoop]: 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] [2022-07-13 21:13:12,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-13 21:13:12,144 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:13:12,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:13:12,145 INFO L85 PathProgramCache]: Analyzing trace with hash 167927732, now seen corresponding path program 1 times [2022-07-13 21:13:12,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:13:12,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158150731] [2022-07-13 21:13:12,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:13:12,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:13:12,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:13:12,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:13:12,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:13:12,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 21:13:12,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:13:12,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 21:13:12,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:13:12,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-13 21:13:12,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:13:12,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-07-13 21:13:12,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:13:12,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:13:12,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:13:12,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158150731] [2022-07-13 21:13:12,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158150731] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:13:12,249 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:13:12,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:13:12,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115983955] [2022-07-13 21:13:12,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:13:12,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:13:12,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:13:12,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:13:12,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:13:12,251 INFO L87 Difference]: Start difference. First operand 37865 states and 58404 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2022-07-13 21:13:23,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:13:23,649 INFO L93 Difference]: Finished difference Result 130991 states and 208169 transitions. [2022-07-13 21:13:23,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 21:13:23,650 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 135 [2022-07-13 21:13:23,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:13:23,952 INFO L225 Difference]: With dead ends: 130991 [2022-07-13 21:13:23,952 INFO L226 Difference]: Without dead ends: 97883 [2022-07-13 21:13:24,038 INFO L412 NwaCegarLoop]: 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 [2022-07-13 21:13:24,039 INFO L413 NwaCegarLoop]: 794 mSDtfsCounter, 1479 mSDsluCounter, 1651 mSDsCounter, 0 mSdLazyCounter, 2283 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1513 SdHoareTripleChecker+Valid, 2445 SdHoareTripleChecker+Invalid, 2403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 2283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-13 21:13:24,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1513 Valid, 2445 Invalid, 2403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 2283 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-13 21:13:24,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97883 states. [2022-07-13 21:13:30,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97883 to 70634. [2022-07-13 21:13:30,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70634 states, 63982 states have (on average 1.5179738051326936) internal successors, (97123), 64277 states have internal predecessors, (97123), 4341 states have call successors, (4341), 1939 states have call predecessors, (4341), 2309 states have return successors, (11428), 4673 states have call predecessors, (11428), 4338 states have call successors, (11428) [2022-07-13 21:13:30,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70634 states to 70634 states and 112892 transitions. [2022-07-13 21:13:30,338 INFO L78 Accepts]: Start accepts. Automaton has 70634 states and 112892 transitions. Word has length 135 [2022-07-13 21:13:30,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:13:30,338 INFO L495 AbstractCegarLoop]: Abstraction has 70634 states and 112892 transitions. [2022-07-13 21:13:30,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2022-07-13 21:13:30,338 INFO L276 IsEmpty]: Start isEmpty. Operand 70634 states and 112892 transitions. [2022-07-13 21:13:30,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-13 21:13:30,362 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:13:30,363 INFO L195 NwaCegarLoop]: 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] [2022-07-13 21:13:30,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-07-13 21:13:30,363 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:13:30,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:13:30,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1865466314, now seen corresponding path program 1 times [2022-07-13 21:13:30,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:13:30,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513893960] [2022-07-13 21:13:30,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:13:30,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:13:30,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:13:30,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:13:30,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:13:30,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 21:13:30,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:13:30,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 21:13:30,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:13:30,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-13 21:13:30,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:13:30,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-07-13 21:13:30,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:13:30,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:13:30,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:13:30,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513893960] [2022-07-13 21:13:30,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513893960] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:13:30,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:13:30,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:13:30,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376884073] [2022-07-13 21:13:30,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:13:30,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:13:30,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:13:30,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:13:30,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:13:30,452 INFO L87 Difference]: Start difference. First operand 70634 states and 112892 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2022-07-13 21:13:40,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:13:40,148 INFO L93 Difference]: Finished difference Result 155154 states and 255729 transitions. [2022-07-13 21:13:40,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-13 21:13:40,149 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 135 [2022-07-13 21:13:40,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:13:40,432 INFO L225 Difference]: With dead ends: 155154 [2022-07-13 21:13:40,432 INFO L226 Difference]: Without dead ends: 89277 [2022-07-13 21:13:40,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-13 21:13:40,566 INFO L413 NwaCegarLoop]: 545 mSDtfsCounter, 1022 mSDsluCounter, 925 mSDsCounter, 0 mSdLazyCounter, 1093 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1048 SdHoareTripleChecker+Valid, 1470 SdHoareTripleChecker+Invalid, 1213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-13 21:13:40,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1048 Valid, 1470 Invalid, 1213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1093 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-13 21:13:40,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89277 states. [2022-07-13 21:13:46,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89277 to 70634. [2022-07-13 21:13:46,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70634 states, 63982 states have (on average 1.5139570504204307) internal successors, (96866), 64277 states have internal predecessors, (96866), 4341 states have call successors, (4341), 1939 states have call predecessors, (4341), 2309 states have return successors, (11428), 4673 states have call predecessors, (11428), 4338 states have call successors, (11428) [2022-07-13 21:13:46,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70634 states to 70634 states and 112635 transitions. [2022-07-13 21:13:46,975 INFO L78 Accepts]: Start accepts. Automaton has 70634 states and 112635 transitions. Word has length 135 [2022-07-13 21:13:46,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 21:13:46,975 INFO L495 AbstractCegarLoop]: Abstraction has 70634 states and 112635 transitions. [2022-07-13 21:13:46,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2022-07-13 21:13:46,975 INFO L276 IsEmpty]: Start isEmpty. Operand 70634 states and 112635 transitions. [2022-07-13 21:13:47,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-13 21:13:47,002 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 21:13:47,003 INFO L195 NwaCegarLoop]: 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] [2022-07-13 21:13:47,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-13 21:13:47,003 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 21:13:47,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 21:13:47,003 INFO L85 PathProgramCache]: Analyzing trace with hash 562792308, now seen corresponding path program 1 times [2022-07-13 21:13:47,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 21:13:47,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363668398] [2022-07-13 21:13:47,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 21:13:47,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 21:13:47,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:13:47,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-13 21:13:47,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:13:47,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-13 21:13:47,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:13:47,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 21:13:47,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:13:47,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-07-13 21:13:47,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:13:47,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-07-13 21:13:47,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 21:13:47,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 21:13:47,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 21:13:47,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363668398] [2022-07-13 21:13:47,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363668398] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 21:13:47,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 21:13:47,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-13 21:13:47,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801845580] [2022-07-13 21:13:47,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 21:13:47,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 21:13:47,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 21:13:47,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 21:13:47,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-13 21:13:47,098 INFO L87 Difference]: Start difference. First operand 70634 states and 112635 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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) [2022-07-13 21:14:08,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 21:14:08,346 INFO L93 Difference]: Finished difference Result 247980 states and 403895 transitions. [2022-07-13 21:14:08,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 21:14:08,346 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 5 states have internal predecessors, (124), 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 135 [2022-07-13 21:14:08,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 21:14:08,989 INFO L225 Difference]: With dead ends: 247980 [2022-07-13 21:14:08,989 INFO L226 Difference]: Without dead ends: 182103