./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.11.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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.11.cil-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ecd70163e84c8e1a236d7543bf55ca7587f7becacb8c522f7caae4b1076f13b5 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 02:32:58,021 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 02:32:58,023 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 02:32:58,051 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 02:32:58,052 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 02:32:58,053 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 02:32:58,054 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 02:32:58,056 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 02:32:58,057 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 02:32:58,058 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 02:32:58,059 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 02:32:58,060 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 02:32:58,060 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 02:32:58,061 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 02:32:58,062 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 02:32:58,063 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 02:32:58,064 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 02:32:58,064 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 02:32:58,066 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 02:32:58,067 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 02:32:58,068 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 02:32:58,069 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 02:32:58,070 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 02:32:58,071 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 02:32:58,073 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 02:32:58,074 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 02:32:58,074 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 02:32:58,075 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 02:32:58,075 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 02:32:58,076 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 02:32:58,082 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 02:32:58,084 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 02:32:58,084 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 02:32:58,085 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 02:32:58,086 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 02:32:58,086 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 02:32:58,087 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 02:32:58,088 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 02:32:58,088 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 02:32:58,090 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 02:32:58,090 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 02:32:58,091 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 02:32:58,127 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 02:32:58,127 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 02:32:58,127 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 02:32:58,128 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 02:32:58,128 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 02:32:58,129 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 02:32:58,129 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 02:32:58,129 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 02:32:58,130 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 02:32:58,130 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 02:32:58,130 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 02:32:58,130 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 02:32:58,130 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 02:32:58,131 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 02:32:58,131 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 02:32:58,131 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 02:32:58,131 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 02:32:58,131 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 02:32:58,132 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 02:32:58,132 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 02:32:58,132 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 02:32:58,132 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 02:32:58,132 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 02:32:58,133 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 02:32:58,133 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 02:32:58,133 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 02:32:58,133 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 02:32:58,133 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 02:32:58,134 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 02:32:58,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 02:32:58,134 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 02:32:58,134 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 02:32:58,134 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 02:32:58,135 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ecd70163e84c8e1a236d7543bf55ca7587f7becacb8c522f7caae4b1076f13b5 [2021-12-28 02:32:58,462 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 02:32:58,492 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 02:32:58,495 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 02:32:58,496 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 02:32:58,497 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 02:32:58,498 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.11.cil-1.c [2021-12-28 02:32:58,561 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a81eed8c/9293b9b8e1f04fb0b421900fe14b9cec/FLAGd807b0c35 [2021-12-28 02:32:59,117 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 02:32:59,118 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.11.cil-1.c [2021-12-28 02:32:59,138 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a81eed8c/9293b9b8e1f04fb0b421900fe14b9cec/FLAGd807b0c35 [2021-12-28 02:32:59,539 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8a81eed8c/9293b9b8e1f04fb0b421900fe14b9cec [2021-12-28 02:32:59,541 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 02:32:59,542 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 02:32:59,543 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 02:32:59,543 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 02:32:59,546 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 02:32:59,547 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 02:32:59" (1/1) ... [2021-12-28 02:32:59,548 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5af25747 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:32:59, skipping insertion in model container [2021-12-28 02:32:59,548 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 02:32:59" (1/1) ... [2021-12-28 02:32:59,554 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 02:32:59,594 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 02:32:59,737 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.11.cil-1.c[914,927] [2021-12-28 02:32:59,819 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.11.cil-1.c[7115,7128] [2021-12-28 02:32:59,983 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 02:32:59,997 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 02:33:00,015 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.11.cil-1.c[914,927] [2021-12-28 02:33:00,038 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.11.cil-1.c[7115,7128] [2021-12-28 02:33:00,071 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 02:33:00,100 INFO L208 MainTranslator]: Completed translation [2021-12-28 02:33:00,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:33:00 WrapperNode [2021-12-28 02:33:00,100 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 02:33:00,102 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 02:33:00,102 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 02:33:00,103 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 02:33:00,109 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:33:00" (1/1) ... [2021-12-28 02:33:00,137 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:33:00" (1/1) ... [2021-12-28 02:33:00,182 INFO L137 Inliner]: procedures = 75, calls = 91, calls flagged for inlining = 43, calls inlined = 43, statements flattened = 987 [2021-12-28 02:33:00,183 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 02:33:00,183 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 02:33:00,183 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 02:33:00,184 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 02:33:00,191 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:33:00" (1/1) ... [2021-12-28 02:33:00,192 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:33:00" (1/1) ... [2021-12-28 02:33:00,195 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:33:00" (1/1) ... [2021-12-28 02:33:00,196 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:33:00" (1/1) ... [2021-12-28 02:33:00,208 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:33:00" (1/1) ... [2021-12-28 02:33:00,236 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:33:00" (1/1) ... [2021-12-28 02:33:00,247 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:33:00" (1/1) ... [2021-12-28 02:33:00,252 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 02:33:00,254 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 02:33:00,254 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 02:33:00,254 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 02:33:00,255 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:33:00" (1/1) ... [2021-12-28 02:33:00,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 02:33:00,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:33:00,285 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-28 02:33:00,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-28 02:33:00,333 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 02:33:00,334 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-28 02:33:00,334 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-28 02:33:00,334 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-12-28 02:33:00,334 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-12-28 02:33:00,336 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-28 02:33:00,336 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-28 02:33:00,336 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-28 02:33:00,336 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-28 02:33:00,336 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-12-28 02:33:00,337 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-12-28 02:33:00,337 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-28 02:33:00,337 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-28 02:33:00,337 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-28 02:33:00,337 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-28 02:33:00,338 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-12-28 02:33:00,338 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-12-28 02:33:00,338 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-12-28 02:33:00,338 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-12-28 02:33:00,339 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-12-28 02:33:00,339 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-12-28 02:33:00,339 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-28 02:33:00,339 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-28 02:33:00,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 02:33:00,340 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-28 02:33:00,340 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-28 02:33:00,340 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-12-28 02:33:00,340 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-12-28 02:33:00,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 02:33:00,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 02:33:00,340 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-28 02:33:00,341 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-28 02:33:00,341 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-28 02:33:00,341 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-28 02:33:00,510 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 02:33:00,512 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 02:33:01,229 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 02:33:01,241 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 02:33:01,241 INFO L299 CfgBuilder]: Removed 18 assume(true) statements. [2021-12-28 02:33:01,244 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 02:33:01 BoogieIcfgContainer [2021-12-28 02:33:01,244 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 02:33:01,245 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 02:33:01,248 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 02:33:01,250 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 02:33:01,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 02:32:59" (1/3) ... [2021-12-28 02:33:01,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20b3499e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 02:33:01, skipping insertion in model container [2021-12-28 02:33:01,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:33:00" (2/3) ... [2021-12-28 02:33:01,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20b3499e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 02:33:01, skipping insertion in model container [2021-12-28 02:33:01,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 02:33:01" (3/3) ... [2021-12-28 02:33:01,266 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.11.cil-1.c [2021-12-28 02:33:01,271 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 02:33:01,271 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-28 02:33:01,326 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 02:33:01,332 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-28 02:33:01,332 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-28 02:33:01,376 INFO L276 IsEmpty]: Start isEmpty. Operand has 466 states, 407 states have (on average 1.6412776412776413) internal successors, (668), 415 states have internal predecessors, (668), 41 states have call successors, (41), 15 states have call predecessors, (41), 15 states have return successors, (41), 39 states have call predecessors, (41), 41 states have call successors, (41) [2021-12-28 02:33:01,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:33:01,395 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:01,396 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:01,397 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:01,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:01,401 INFO L85 PathProgramCache]: Analyzing trace with hash -332342255, now seen corresponding path program 1 times [2021-12-28 02:33:01,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:01,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051221438] [2021-12-28 02:33:01,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:01,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:01,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:01,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:01,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:01,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:01,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:01,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:01,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:01,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:01,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:01,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:01,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:01,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:01,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:01,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:01,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:01,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:01,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:01,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051221438] [2021-12-28 02:33:01,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051221438] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:01,821 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:01,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 02:33:01,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922422564] [2021-12-28 02:33:01,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:01,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 02:33:01,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:01,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 02:33:01,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:33:01,864 INFO L87 Difference]: Start difference. First operand has 466 states, 407 states have (on average 1.6412776412776413) internal successors, (668), 415 states have internal predecessors, (668), 41 states have call successors, (41), 15 states have call predecessors, (41), 15 states have return successors, (41), 39 states have call predecessors, (41), 41 states have call successors, (41) Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-28 02:33:02,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:02,992 INFO L93 Difference]: Finished difference Result 1039 states and 1660 transitions. [2021-12-28 02:33:02,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:33:02,995 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-28 02:33:02,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:03,009 INFO L225 Difference]: With dead ends: 1039 [2021-12-28 02:33:03,009 INFO L226 Difference]: Without dead ends: 590 [2021-12-28 02:33:03,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-12-28 02:33:03,019 INFO L933 BasicCegarLoop]: 711 mSDtfsCounter, 1158 mSDsluCounter, 1661 mSDsCounter, 0 mSdLazyCounter, 1061 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1163 SdHoareTripleChecker+Valid, 2372 SdHoareTripleChecker+Invalid, 1259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:03,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1163 Valid, 2372 Invalid, 1259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1061 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-28 02:33:03,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2021-12-28 02:33:03,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 551. [2021-12-28 02:33:03,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 475 states have (on average 1.5263157894736843) internal successors, (725), 482 states have internal predecessors, (725), 52 states have call successors, (52), 22 states have call predecessors, (52), 22 states have return successors, (53), 49 states have call predecessors, (53), 48 states have call successors, (53) [2021-12-28 02:33:03,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 830 transitions. [2021-12-28 02:33:03,104 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 830 transitions. Word has length 65 [2021-12-28 02:33:03,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:03,105 INFO L470 AbstractCegarLoop]: Abstraction has 551 states and 830 transitions. [2021-12-28 02:33:03,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-28 02:33:03,105 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 830 transitions. [2021-12-28 02:33:03,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:33:03,109 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:03,109 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:03,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 02:33:03,110 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:03,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:03,111 INFO L85 PathProgramCache]: Analyzing trace with hash 71443696, now seen corresponding path program 1 times [2021-12-28 02:33:03,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:03,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046130996] [2021-12-28 02:33:03,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:03,112 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:03,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:03,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:03,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:03,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:03,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:03,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:03,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:03,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:03,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:03,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:03,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:03,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:03,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:03,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:03,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:03,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:03,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:03,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046130996] [2021-12-28 02:33:03,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046130996] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:03,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:03,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 02:33:03,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418862507] [2021-12-28 02:33:03,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:03,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 02:33:03,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:03,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 02:33:03,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:33:03,246 INFO L87 Difference]: Start difference. First operand 551 states and 830 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-28 02:33:04,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:04,415 INFO L93 Difference]: Finished difference Result 898 states and 1307 transitions. [2021-12-28 02:33:04,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-28 02:33:04,416 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-28 02:33:04,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:04,426 INFO L225 Difference]: With dead ends: 898 [2021-12-28 02:33:04,426 INFO L226 Difference]: Without dead ends: 721 [2021-12-28 02:33:04,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-12-28 02:33:04,432 INFO L933 BasicCegarLoop]: 747 mSDtfsCounter, 1383 mSDsluCounter, 1862 mSDsCounter, 0 mSdLazyCounter, 1315 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1413 SdHoareTripleChecker+Valid, 2609 SdHoareTripleChecker+Invalid, 1459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 1315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:04,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1413 Valid, 2609 Invalid, 1459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 1315 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-28 02:33:04,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-12-28 02:33:04,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 647. [2021-12-28 02:33:04,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 551 states have (on average 1.5045372050816697) internal successors, (829), 560 states have internal predecessors, (829), 63 states have call successors, (63), 29 states have call predecessors, (63), 31 states have return successors, (72), 61 states have call predecessors, (72), 59 states have call successors, (72) [2021-12-28 02:33:04,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 964 transitions. [2021-12-28 02:33:04,480 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 964 transitions. Word has length 65 [2021-12-28 02:33:04,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:04,480 INFO L470 AbstractCegarLoop]: Abstraction has 647 states and 964 transitions. [2021-12-28 02:33:04,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-28 02:33:04,481 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 964 transitions. [2021-12-28 02:33:04,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:33:04,484 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:04,484 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:04,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 02:33:04,485 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:04,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:04,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1957142414, now seen corresponding path program 1 times [2021-12-28 02:33:04,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:04,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978875240] [2021-12-28 02:33:04,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:04,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:04,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:04,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:04,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:04,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:04,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:04,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:04,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:04,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:04,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:04,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:04,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:04,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:04,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:04,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:04,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:04,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:04,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:04,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978875240] [2021-12-28 02:33:04,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978875240] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:04,659 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:04,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 02:33:04,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879450398] [2021-12-28 02:33:04,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:04,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 02:33:04,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:04,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 02:33:04,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-28 02:33:04,661 INFO L87 Difference]: Start difference. First operand 647 states and 964 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-28 02:33:05,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:05,759 INFO L93 Difference]: Finished difference Result 948 states and 1378 transitions. [2021-12-28 02:33:05,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-28 02:33:05,760 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2021-12-28 02:33:05,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:05,768 INFO L225 Difference]: With dead ends: 948 [2021-12-28 02:33:05,769 INFO L226 Difference]: Without dead ends: 681 [2021-12-28 02:33:05,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-28 02:33:05,778 INFO L933 BasicCegarLoop]: 686 mSDtfsCounter, 911 mSDsluCounter, 2057 mSDsCounter, 0 mSdLazyCounter, 1551 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 912 SdHoareTripleChecker+Valid, 2743 SdHoareTripleChecker+Invalid, 1695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 1551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:05,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [912 Valid, 2743 Invalid, 1695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 1551 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-28 02:33:05,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2021-12-28 02:33:05,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 652. [2021-12-28 02:33:05,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 555 states have (on average 1.4972972972972973) internal successors, (831), 564 states have internal predecessors, (831), 63 states have call successors, (63), 29 states have call predecessors, (63), 32 states have return successors, (73), 62 states have call predecessors, (73), 59 states have call successors, (73) [2021-12-28 02:33:05,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 967 transitions. [2021-12-28 02:33:05,836 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 967 transitions. Word has length 65 [2021-12-28 02:33:05,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:05,837 INFO L470 AbstractCegarLoop]: Abstraction has 652 states and 967 transitions. [2021-12-28 02:33:05,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-28 02:33:05,837 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 967 transitions. [2021-12-28 02:33:05,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:33:05,843 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:05,844 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:05,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 02:33:05,844 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:05,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:05,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1308465584, now seen corresponding path program 1 times [2021-12-28 02:33:05,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:05,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773522127] [2021-12-28 02:33:05,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:05,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:05,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:05,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:05,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:05,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:05,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:05,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:05,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:05,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:05,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:05,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:05,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:05,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:05,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:05,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:05,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:05,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:05,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:05,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773522127] [2021-12-28 02:33:05,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773522127] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:05,998 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:05,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 02:33:05,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503673012] [2021-12-28 02:33:05,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:05,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 02:33:05,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:06,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 02:33:06,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-28 02:33:06,000 INFO L87 Difference]: Start difference. First operand 652 states and 967 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-28 02:33:07,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:07,779 INFO L93 Difference]: Finished difference Result 1974 states and 2763 transitions. [2021-12-28 02:33:07,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-28 02:33:07,780 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 65 [2021-12-28 02:33:07,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:07,790 INFO L225 Difference]: With dead ends: 1974 [2021-12-28 02:33:07,790 INFO L226 Difference]: Without dead ends: 1684 [2021-12-28 02:33:07,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-12-28 02:33:07,798 INFO L933 BasicCegarLoop]: 789 mSDtfsCounter, 3462 mSDsluCounter, 2099 mSDsCounter, 0 mSdLazyCounter, 1678 mSolverCounterSat, 624 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3476 SdHoareTripleChecker+Valid, 2888 SdHoareTripleChecker+Invalid, 2302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 624 IncrementalHoareTripleChecker+Valid, 1678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:07,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3476 Valid, 2888 Invalid, 2302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [624 Valid, 1678 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-28 02:33:07,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1684 states. [2021-12-28 02:33:07,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1684 to 1553. [2021-12-28 02:33:07,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1553 states, 1270 states have (on average 1.3937007874015748) internal successors, (1770), 1294 states have internal predecessors, (1770), 151 states have call successors, (151), 112 states have call predecessors, (151), 130 states have return successors, (187), 149 states have call predecessors, (187), 147 states have call successors, (187) [2021-12-28 02:33:07,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1553 states to 1553 states and 2108 transitions. [2021-12-28 02:33:07,886 INFO L78 Accepts]: Start accepts. Automaton has 1553 states and 2108 transitions. Word has length 65 [2021-12-28 02:33:07,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:07,886 INFO L470 AbstractCegarLoop]: Abstraction has 1553 states and 2108 transitions. [2021-12-28 02:33:07,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 7 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-28 02:33:07,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1553 states and 2108 transitions. [2021-12-28 02:33:07,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:33:07,887 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:07,888 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:07,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 02:33:07,888 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:07,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:07,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1935052623, now seen corresponding path program 1 times [2021-12-28 02:33:07,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:07,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282247806] [2021-12-28 02:33:07,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:07,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:07,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:07,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:07,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:07,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:07,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:07,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:07,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:07,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:07,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:07,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:07,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:08,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:08,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:08,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:08,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:08,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:08,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:08,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282247806] [2021-12-28 02:33:08,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282247806] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:08,036 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:08,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 02:33:08,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815465952] [2021-12-28 02:33:08,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:08,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 02:33:08,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:08,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 02:33:08,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-28 02:33:08,038 INFO L87 Difference]: Start difference. First operand 1553 states and 2108 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-28 02:33:09,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:09,133 INFO L93 Difference]: Finished difference Result 2844 states and 3781 transitions. [2021-12-28 02:33:09,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-28 02:33:09,133 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2021-12-28 02:33:09,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:09,142 INFO L225 Difference]: With dead ends: 2844 [2021-12-28 02:33:09,142 INFO L226 Difference]: Without dead ends: 1659 [2021-12-28 02:33:09,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-12-28 02:33:09,146 INFO L933 BasicCegarLoop]: 681 mSDtfsCounter, 612 mSDsluCounter, 2373 mSDsCounter, 0 mSdLazyCounter, 1582 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 3054 SdHoareTripleChecker+Invalid, 1682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:09,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [614 Valid, 3054 Invalid, 1682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1582 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-28 02:33:09,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1659 states. [2021-12-28 02:33:09,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1659 to 1583. [2021-12-28 02:33:09,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1583 states, 1294 states have (on average 1.3802163833075733) internal successors, (1786), 1318 states have internal predecessors, (1786), 151 states have call successors, (151), 112 states have call predecessors, (151), 136 states have return successors, (193), 155 states have call predecessors, (193), 147 states have call successors, (193) [2021-12-28 02:33:09,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 2130 transitions. [2021-12-28 02:33:09,233 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 2130 transitions. Word has length 65 [2021-12-28 02:33:09,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:09,233 INFO L470 AbstractCegarLoop]: Abstraction has 1583 states and 2130 transitions. [2021-12-28 02:33:09,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 5 states have internal predecessors, (50), 2 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-28 02:33:09,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 2130 transitions. [2021-12-28 02:33:09,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:33:09,235 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:09,235 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:09,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 02:33:09,236 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:09,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:09,236 INFO L85 PathProgramCache]: Analyzing trace with hash -548849229, now seen corresponding path program 1 times [2021-12-28 02:33:09,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:09,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991318000] [2021-12-28 02:33:09,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:09,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:09,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:09,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:09,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:09,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:09,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:09,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:09,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:09,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:09,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:09,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:09,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:09,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:09,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:09,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:09,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:09,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:09,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:09,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991318000] [2021-12-28 02:33:09,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991318000] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:09,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:09,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 02:33:09,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614757238] [2021-12-28 02:33:09,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:09,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 02:33:09,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:09,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 02:33:09,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:33:09,344 INFO L87 Difference]: Start difference. First operand 1583 states and 2130 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-28 02:33:10,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:10,292 INFO L93 Difference]: Finished difference Result 2838 states and 3677 transitions. [2021-12-28 02:33:10,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-28 02:33:10,293 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-28 02:33:10,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:10,303 INFO L225 Difference]: With dead ends: 2838 [2021-12-28 02:33:10,304 INFO L226 Difference]: Without dead ends: 1846 [2021-12-28 02:33:10,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-12-28 02:33:10,308 INFO L933 BasicCegarLoop]: 691 mSDtfsCounter, 1366 mSDsluCounter, 1663 mSDsCounter, 0 mSdLazyCounter, 1229 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1394 SdHoareTripleChecker+Valid, 2354 SdHoareTripleChecker+Invalid, 1376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:10,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1394 Valid, 2354 Invalid, 1376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1229 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-28 02:33:10,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1846 states. [2021-12-28 02:33:10,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1846 to 1525. [2021-12-28 02:33:10,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1525 states, 1252 states have (on average 1.3777955271565496) internal successors, (1725), 1271 states have internal predecessors, (1725), 145 states have call successors, (145), 107 states have call predecessors, (145), 126 states have return successors, (178), 148 states have call predecessors, (178), 141 states have call successors, (178) [2021-12-28 02:33:10,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1525 states to 1525 states and 2048 transitions. [2021-12-28 02:33:10,399 INFO L78 Accepts]: Start accepts. Automaton has 1525 states and 2048 transitions. Word has length 65 [2021-12-28 02:33:10,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:10,399 INFO L470 AbstractCegarLoop]: Abstraction has 1525 states and 2048 transitions. [2021-12-28 02:33:10,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-28 02:33:10,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1525 states and 2048 transitions. [2021-12-28 02:33:10,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:33:10,400 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:10,401 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:10,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 02:33:10,401 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:10,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:10,402 INFO L85 PathProgramCache]: Analyzing trace with hash -682862735, now seen corresponding path program 1 times [2021-12-28 02:33:10,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:10,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819143146] [2021-12-28 02:33:10,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:10,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:10,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:10,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:10,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:10,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:10,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:10,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:10,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:10,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:10,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:10,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:10,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:10,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:10,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:10,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:10,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:10,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:10,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:10,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819143146] [2021-12-28 02:33:10,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819143146] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:10,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:10,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:33:10,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537001582] [2021-12-28 02:33:10,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:10,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:33:10,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:10,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:33:10,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:33:10,502 INFO L87 Difference]: Start difference. First operand 1525 states and 2048 transitions. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-28 02:33:11,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:11,034 INFO L93 Difference]: Finished difference Result 3864 states and 5009 transitions. [2021-12-28 02:33:11,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-28 02:33:11,035 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2021-12-28 02:33:11,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:11,047 INFO L225 Difference]: With dead ends: 3864 [2021-12-28 02:33:11,048 INFO L226 Difference]: Without dead ends: 2708 [2021-12-28 02:33:11,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-12-28 02:33:11,052 INFO L933 BasicCegarLoop]: 664 mSDtfsCounter, 1334 mSDsluCounter, 1319 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1366 SdHoareTripleChecker+Valid, 1983 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:11,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1366 Valid, 1983 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 02:33:11,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2708 states. [2021-12-28 02:33:11,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2708 to 2588. [2021-12-28 02:33:11,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2588 states, 2072 states have (on average 1.3112934362934363) internal successors, (2717), 2108 states have internal predecessors, (2717), 264 states have call successors, (264), 206 states have call predecessors, (264), 250 states have return successors, (369), 276 states have call predecessors, (369), 260 states have call successors, (369) [2021-12-28 02:33:11,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2588 states to 2588 states and 3350 transitions. [2021-12-28 02:33:11,165 INFO L78 Accepts]: Start accepts. Automaton has 2588 states and 3350 transitions. Word has length 65 [2021-12-28 02:33:11,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:11,165 INFO L470 AbstractCegarLoop]: Abstraction has 2588 states and 3350 transitions. [2021-12-28 02:33:11,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-28 02:33:11,166 INFO L276 IsEmpty]: Start isEmpty. Operand 2588 states and 3350 transitions. [2021-12-28 02:33:11,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-28 02:33:11,171 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:11,171 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:11,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-28 02:33:11,172 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:11,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:11,172 INFO L85 PathProgramCache]: Analyzing trace with hash 988669412, now seen corresponding path program 1 times [2021-12-28 02:33:11,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:11,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849182241] [2021-12-28 02:33:11,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:11,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:11,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:11,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:11,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:11,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:11,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:11,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:11,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:11,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:11,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:11,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:11,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:11,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:11,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:11,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:11,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:11,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:11,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:11,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849182241] [2021-12-28 02:33:11,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849182241] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:11,259 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:11,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 02:33:11,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987734434] [2021-12-28 02:33:11,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:11,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:33:11,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:11,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:33:11,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:33:11,261 INFO L87 Difference]: Start difference. First operand 2588 states and 3350 transitions. Second operand has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-28 02:33:11,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:11,958 INFO L93 Difference]: Finished difference Result 5904 states and 7495 transitions. [2021-12-28 02:33:11,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 02:33:11,958 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2021-12-28 02:33:11,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:11,979 INFO L225 Difference]: With dead ends: 5904 [2021-12-28 02:33:11,979 INFO L226 Difference]: Without dead ends: 3690 [2021-12-28 02:33:11,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:33:11,988 INFO L933 BasicCegarLoop]: 692 mSDtfsCounter, 788 mSDsluCounter, 1276 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 797 SdHoareTripleChecker+Valid, 1968 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:11,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [797 Valid, 1968 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-28 02:33:11,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3690 states. [2021-12-28 02:33:12,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3690 to 3422. [2021-12-28 02:33:12,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3422 states, 2720 states have (on average 1.2911764705882354) internal successors, (3512), 2761 states have internal predecessors, (3512), 356 states have call successors, (356), 286 states have call predecessors, (356), 344 states have return successors, (483), 377 states have call predecessors, (483), 352 states have call successors, (483) [2021-12-28 02:33:12,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3422 states to 3422 states and 4351 transitions. [2021-12-28 02:33:12,162 INFO L78 Accepts]: Start accepts. Automaton has 3422 states and 4351 transitions. Word has length 66 [2021-12-28 02:33:12,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:12,163 INFO L470 AbstractCegarLoop]: Abstraction has 3422 states and 4351 transitions. [2021-12-28 02:33:12,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.5) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-28 02:33:12,163 INFO L276 IsEmpty]: Start isEmpty. Operand 3422 states and 4351 transitions. [2021-12-28 02:33:12,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-28 02:33:12,164 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:12,164 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:12,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-28 02:33:12,165 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:12,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:12,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1936436605, now seen corresponding path program 1 times [2021-12-28 02:33:12,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:12,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629522236] [2021-12-28 02:33:12,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:12,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:12,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:12,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:12,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:12,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:12,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:12,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:12,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:12,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:12,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:12,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:12,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:12,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:12,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:12,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:12,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:12,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:12,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:12,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629522236] [2021-12-28 02:33:12,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629522236] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:12,254 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:12,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 02:33:12,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904529060] [2021-12-28 02:33:12,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:12,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:33:12,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:12,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:33:12,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:33:12,255 INFO L87 Difference]: Start difference. First operand 3422 states and 4351 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-28 02:33:12,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:12,727 INFO L93 Difference]: Finished difference Result 7294 states and 9125 transitions. [2021-12-28 02:33:12,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 02:33:12,727 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 72 [2021-12-28 02:33:12,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:12,747 INFO L225 Difference]: With dead ends: 7294 [2021-12-28 02:33:12,747 INFO L226 Difference]: Without dead ends: 4244 [2021-12-28 02:33:12,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:33:12,758 INFO L933 BasicCegarLoop]: 709 mSDtfsCounter, 1637 mSDsluCounter, 696 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1670 SdHoareTripleChecker+Valid, 1405 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:12,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1670 Valid, 1405 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 02:33:12,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4244 states. [2021-12-28 02:33:12,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4244 to 3976. [2021-12-28 02:33:12,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3976 states, 3160 states have (on average 1.2822784810126582) internal successors, (4052), 3205 states have internal predecessors, (4052), 412 states have call successors, (412), 336 states have call predecessors, (412), 402 states have return successors, (556), 437 states have call predecessors, (556), 408 states have call successors, (556) [2021-12-28 02:33:12,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3976 states to 3976 states and 5020 transitions. [2021-12-28 02:33:12,984 INFO L78 Accepts]: Start accepts. Automaton has 3976 states and 5020 transitions. Word has length 72 [2021-12-28 02:33:12,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:12,985 INFO L470 AbstractCegarLoop]: Abstraction has 3976 states and 5020 transitions. [2021-12-28 02:33:12,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 3 states have internal predecessors, (57), 3 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-28 02:33:12,986 INFO L276 IsEmpty]: Start isEmpty. Operand 3976 states and 5020 transitions. [2021-12-28 02:33:12,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-28 02:33:12,988 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:12,988 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:12,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-28 02:33:12,988 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:12,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:12,989 INFO L85 PathProgramCache]: Analyzing trace with hash -416876785, now seen corresponding path program 1 times [2021-12-28 02:33:12,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:12,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098169125] [2021-12-28 02:33:12,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:12,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:13,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:13,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:13,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:13,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:13,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:13,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:13,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:13,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:13,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:13,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:13,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:13,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:13,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:13,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:13,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:13,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:13,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:13,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098169125] [2021-12-28 02:33:13,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098169125] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:13,087 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:13,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:33:13,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407296163] [2021-12-28 02:33:13,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:13,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:33:13,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:13,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:33:13,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:33:13,089 INFO L87 Difference]: Start difference. First operand 3976 states and 5020 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-28 02:33:13,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:13,644 INFO L93 Difference]: Finished difference Result 5062 states and 6315 transitions. [2021-12-28 02:33:13,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-28 02:33:13,644 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 73 [2021-12-28 02:33:13,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:13,665 INFO L225 Difference]: With dead ends: 5062 [2021-12-28 02:33:13,665 INFO L226 Difference]: Without dead ends: 5059 [2021-12-28 02:33:13,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-12-28 02:33:13,668 INFO L933 BasicCegarLoop]: 704 mSDtfsCounter, 1966 mSDsluCounter, 1003 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1976 SdHoareTripleChecker+Valid, 1707 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:13,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1976 Valid, 1707 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 02:33:13,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5059 states. [2021-12-28 02:33:13,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5059 to 4438. [2021-12-28 02:33:13,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4438 states, 3515 states have (on average 1.2711237553342816) internal successors, (4468), 3563 states have internal predecessors, (4468), 462 states have call successors, (462), 380 states have call predecessors, (462), 459 states have return successors, (633), 497 states have call predecessors, (633), 459 states have call successors, (633) [2021-12-28 02:33:13,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4438 states to 4438 states and 5563 transitions. [2021-12-28 02:33:13,910 INFO L78 Accepts]: Start accepts. Automaton has 4438 states and 5563 transitions. Word has length 73 [2021-12-28 02:33:13,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:13,911 INFO L470 AbstractCegarLoop]: Abstraction has 4438 states and 5563 transitions. [2021-12-28 02:33:13,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-28 02:33:13,912 INFO L276 IsEmpty]: Start isEmpty. Operand 4438 states and 5563 transitions. [2021-12-28 02:33:13,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-28 02:33:13,913 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:13,913 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:13,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-28 02:33:13,914 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:13,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:13,915 INFO L85 PathProgramCache]: Analyzing trace with hash -39666611, now seen corresponding path program 1 times [2021-12-28 02:33:13,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:13,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879367961] [2021-12-28 02:33:13,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:13,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:13,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:13,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:13,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:13,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:13,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:14,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:14,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:14,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:14,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:14,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:14,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:14,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:14,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:14,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:14,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:14,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:14,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:14,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879367961] [2021-12-28 02:33:14,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879367961] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:33:14,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448995736] [2021-12-28 02:33:14,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:14,030 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:33:14,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:33:14,035 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 02:33:14,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 02:33:14,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:14,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-28 02:33:14,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:33:14,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:14,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 02:33:14,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:14,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448995736] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 02:33:14,886 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 02:33:14,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 10 [2021-12-28 02:33:14,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533664665] [2021-12-28 02:33:14,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 02:33:14,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 02:33:14,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:14,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 02:33:14,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-28 02:33:14,888 INFO L87 Difference]: Start difference. First operand 4438 states and 5563 transitions. Second operand has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-28 02:33:16,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:16,751 INFO L93 Difference]: Finished difference Result 8756 states and 10772 transitions. [2021-12-28 02:33:16,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-28 02:33:16,752 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 74 [2021-12-28 02:33:16,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:16,796 INFO L225 Difference]: With dead ends: 8756 [2021-12-28 02:33:16,797 INFO L226 Difference]: Without dead ends: 8753 [2021-12-28 02:33:16,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 173 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=593, Unknown=0, NotChecked=0, Total=756 [2021-12-28 02:33:16,804 INFO L933 BasicCegarLoop]: 856 mSDtfsCounter, 2113 mSDsluCounter, 1961 mSDsCounter, 0 mSdLazyCounter, 2134 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2176 SdHoareTripleChecker+Valid, 2817 SdHoareTripleChecker+Invalid, 2400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 2134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:16,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2176 Valid, 2817 Invalid, 2400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 2134 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-28 02:33:16,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8753 states. [2021-12-28 02:33:17,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8753 to 7855. [2021-12-28 02:33:17,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7855 states, 6190 states have (on average 1.2521809369951535) internal successors, (7751), 6273 states have internal predecessors, (7751), 821 states have call successors, (821), 694 states have call predecessors, (821), 842 states have return successors, (1134), 890 states have call predecessors, (1134), 818 states have call successors, (1134) [2021-12-28 02:33:17,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7855 states to 7855 states and 9706 transitions. [2021-12-28 02:33:17,270 INFO L78 Accepts]: Start accepts. Automaton has 7855 states and 9706 transitions. Word has length 74 [2021-12-28 02:33:17,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:17,270 INFO L470 AbstractCegarLoop]: Abstraction has 7855 states and 9706 transitions. [2021-12-28 02:33:17,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 7 states have internal predecessors, (120), 4 states have call successors, (20), 6 states have call predecessors, (20), 2 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-12-28 02:33:17,271 INFO L276 IsEmpty]: Start isEmpty. Operand 7855 states and 9706 transitions. [2021-12-28 02:33:17,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-28 02:33:17,272 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:17,272 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:17,297 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-28 02:33:17,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-28 02:33:17,491 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:17,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:17,492 INFO L85 PathProgramCache]: Analyzing trace with hash 2126221583, now seen corresponding path program 2 times [2021-12-28 02:33:17,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:17,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735332081] [2021-12-28 02:33:17,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:17,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:17,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:17,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:17,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:17,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:17,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:17,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:17,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:17,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:17,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:17,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:17,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:17,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:17,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:17,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:17,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:17,562 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:17,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:17,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735332081] [2021-12-28 02:33:17,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735332081] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:17,562 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:17,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 02:33:17,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907620384] [2021-12-28 02:33:17,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:17,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:33:17,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:17,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:33:17,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:33:17,564 INFO L87 Difference]: Start difference. First operand 7855 states and 9706 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-28 02:33:18,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:18,042 INFO L93 Difference]: Finished difference Result 10449 states and 12915 transitions. [2021-12-28 02:33:18,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 02:33:18,043 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 77 [2021-12-28 02:33:18,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:18,070 INFO L225 Difference]: With dead ends: 10449 [2021-12-28 02:33:18,070 INFO L226 Difference]: Without dead ends: 4275 [2021-12-28 02:33:18,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-28 02:33:18,085 INFO L933 BasicCegarLoop]: 735 mSDtfsCounter, 1540 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1575 SdHoareTripleChecker+Valid, 1452 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:18,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1575 Valid, 1452 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 02:33:18,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4275 states. [2021-12-28 02:33:18,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4275 to 3267. [2021-12-28 02:33:18,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3267 states, 2608 states have (on average 1.2661042944785277) internal successors, (3302), 2637 states have internal predecessors, (3302), 340 states have call successors, (340), 276 states have call predecessors, (340), 317 states have return successors, (433), 356 states have call predecessors, (433), 337 states have call successors, (433) [2021-12-28 02:33:18,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3267 states to 3267 states and 4075 transitions. [2021-12-28 02:33:18,317 INFO L78 Accepts]: Start accepts. Automaton has 3267 states and 4075 transitions. Word has length 77 [2021-12-28 02:33:18,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:18,317 INFO L470 AbstractCegarLoop]: Abstraction has 3267 states and 4075 transitions. [2021-12-28 02:33:18,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 3 states have internal predecessors, (62), 2 states have call successors, (8), 5 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-28 02:33:18,318 INFO L276 IsEmpty]: Start isEmpty. Operand 3267 states and 4075 transitions. [2021-12-28 02:33:18,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-28 02:33:18,320 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:18,321 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:18,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-28 02:33:18,321 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:18,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:18,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1294168321, now seen corresponding path program 1 times [2021-12-28 02:33:18,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:18,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725955496] [2021-12-28 02:33:18,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:18,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:18,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:18,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:18,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:18,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:18,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:18,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:18,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:18,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-28 02:33:18,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,417 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-28 02:33:18,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:18,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725955496] [2021-12-28 02:33:18,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725955496] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:18,417 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:18,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 02:33:18,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095461460] [2021-12-28 02:33:18,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:18,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 02:33:18,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:18,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 02:33:18,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:33:18,419 INFO L87 Difference]: Start difference. First operand 3267 states and 4075 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-28 02:33:19,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:19,647 INFO L93 Difference]: Finished difference Result 9051 states and 11072 transitions. [2021-12-28 02:33:19,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-28 02:33:19,648 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 84 [2021-12-28 02:33:19,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:19,666 INFO L225 Difference]: With dead ends: 9051 [2021-12-28 02:33:19,666 INFO L226 Difference]: Without dead ends: 5353 [2021-12-28 02:33:19,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-12-28 02:33:19,676 INFO L933 BasicCegarLoop]: 735 mSDtfsCounter, 1070 mSDsluCounter, 2056 mSDsCounter, 0 mSdLazyCounter, 1185 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1082 SdHoareTripleChecker+Valid, 2791 SdHoareTripleChecker+Invalid, 1414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 1185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:19,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1082 Valid, 2791 Invalid, 1414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 1185 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-28 02:33:19,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5353 states. [2021-12-28 02:33:19,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5353 to 5093. [2021-12-28 02:33:19,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5093 states, 3999 states have (on average 1.2283070767691924) internal successors, (4912), 4065 states have internal predecessors, (4912), 540 states have call successors, (540), 448 states have call predecessors, (540), 552 states have return successors, (783), 582 states have call predecessors, (783), 537 states have call successors, (783) [2021-12-28 02:33:19,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5093 states to 5093 states and 6235 transitions. [2021-12-28 02:33:19,925 INFO L78 Accepts]: Start accepts. Automaton has 5093 states and 6235 transitions. Word has length 84 [2021-12-28 02:33:19,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:19,926 INFO L470 AbstractCegarLoop]: Abstraction has 5093 states and 6235 transitions. [2021-12-28 02:33:19,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 5 states have internal predecessors, (63), 4 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-28 02:33:19,926 INFO L276 IsEmpty]: Start isEmpty. Operand 5093 states and 6235 transitions. [2021-12-28 02:33:19,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-28 02:33:19,929 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:19,929 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:19,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-28 02:33:19,930 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:19,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:19,947 INFO L85 PathProgramCache]: Analyzing trace with hash -432582963, now seen corresponding path program 1 times [2021-12-28 02:33:19,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:19,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413675254] [2021-12-28 02:33:19,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:19,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:19,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:19,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:19,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:20,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:20,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:20,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:20,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:20,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:20,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:20,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:20,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:20,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:20,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:20,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:20,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:20,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-28 02:33:20,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:20,040 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-28 02:33:20,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:20,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413675254] [2021-12-28 02:33:20,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413675254] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:20,041 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:20,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 02:33:20,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414513840] [2021-12-28 02:33:20,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:20,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 02:33:20,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:20,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 02:33:20,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-28 02:33:20,043 INFO L87 Difference]: Start difference. First operand 5093 states and 6235 transitions. Second operand has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-28 02:33:21,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:21,334 INFO L93 Difference]: Finished difference Result 8453 states and 10253 transitions. [2021-12-28 02:33:21,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-28 02:33:21,334 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 93 [2021-12-28 02:33:21,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:21,349 INFO L225 Difference]: With dead ends: 8453 [2021-12-28 02:33:21,350 INFO L226 Difference]: Without dead ends: 4254 [2021-12-28 02:33:21,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2021-12-28 02:33:21,361 INFO L933 BasicCegarLoop]: 718 mSDtfsCounter, 2270 mSDsluCounter, 1396 mSDsCounter, 0 mSdLazyCounter, 1248 mSolverCounterSat, 399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2308 SdHoareTripleChecker+Valid, 2114 SdHoareTripleChecker+Invalid, 1647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 399 IncrementalHoareTripleChecker+Valid, 1248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:21,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2308 Valid, 2114 Invalid, 1647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [399 Valid, 1248 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-28 02:33:21,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4254 states. [2021-12-28 02:33:21,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4254 to 3833. [2021-12-28 02:33:21,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3833 states, 3005 states have (on average 1.2199667221297836) internal successors, (3666), 3059 states have internal predecessors, (3666), 405 states have call successors, (405), 330 states have call predecessors, (405), 421 states have return successors, (552), 446 states have call predecessors, (552), 402 states have call successors, (552) [2021-12-28 02:33:21,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 4623 transitions. [2021-12-28 02:33:21,590 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 4623 transitions. Word has length 93 [2021-12-28 02:33:21,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:21,591 INFO L470 AbstractCegarLoop]: Abstraction has 3833 states and 4623 transitions. [2021-12-28 02:33:21,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.222222222222221) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-12-28 02:33:21,591 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 4623 transitions. [2021-12-28 02:33:21,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-28 02:33:21,594 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:21,595 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:21,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-28 02:33:21,596 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:21,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:21,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1414647481, now seen corresponding path program 1 times [2021-12-28 02:33:21,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:21,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870644915] [2021-12-28 02:33:21,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:21,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:21,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:21,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:21,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:21,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:21,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:21,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:21,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:21,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:21,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:21,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:21,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:21,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:21,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:21,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:21,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:21,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-28 02:33:21,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:21,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-28 02:33:21,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:21,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-28 02:33:21,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:21,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-28 02:33:21,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:21,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:21,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:21,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:21,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:21,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-28 02:33:21,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:21,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-28 02:33:21,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:21,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-28 02:33:21,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:21,727 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-12-28 02:33:21,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:21,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870644915] [2021-12-28 02:33:21,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870644915] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:33:21,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115651967] [2021-12-28 02:33:21,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:21,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:33:21,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:33:21,732 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 02:33:21,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-28 02:33:21,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:21,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-28 02:33:21,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:33:22,069 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-28 02:33:22,070 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:33:22,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115651967] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:22,070 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 02:33:22,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 12 [2021-12-28 02:33:22,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596284493] [2021-12-28 02:33:22,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:22,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:33:22,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:22,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:33:22,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-12-28 02:33:22,072 INFO L87 Difference]: Start difference. First operand 3833 states and 4623 transitions. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-28 02:33:22,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:22,198 INFO L93 Difference]: Finished difference Result 5708 states and 6862 transitions. [2021-12-28 02:33:22,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:33:22,199 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) Word has length 145 [2021-12-28 02:33:22,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:22,205 INFO L225 Difference]: With dead ends: 5708 [2021-12-28 02:33:22,205 INFO L226 Difference]: Without dead ends: 2249 [2021-12-28 02:33:22,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-12-28 02:33:22,212 INFO L933 BasicCegarLoop]: 695 mSDtfsCounter, 34 mSDsluCounter, 2743 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 3438 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:22,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 3438 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:33:22,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2249 states. [2021-12-28 02:33:22,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2249 to 2127. [2021-12-28 02:33:22,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2127 states, 1745 states have (on average 1.2469914040114614) internal successors, (2176), 1762 states have internal predecessors, (2176), 194 states have call successors, (194), 144 states have call predecessors, (194), 186 states have return successors, (259), 221 states have call predecessors, (259), 191 states have call successors, (259) [2021-12-28 02:33:22,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2127 states to 2127 states and 2629 transitions. [2021-12-28 02:33:22,370 INFO L78 Accepts]: Start accepts. Automaton has 2127 states and 2629 transitions. Word has length 145 [2021-12-28 02:33:22,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:22,371 INFO L470 AbstractCegarLoop]: Abstraction has 2127 states and 2629 transitions. [2021-12-28 02:33:22,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 5 states have internal predecessors, (106), 2 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (16), 3 states have call predecessors, (16), 2 states have call successors, (16) [2021-12-28 02:33:22,371 INFO L276 IsEmpty]: Start isEmpty. Operand 2127 states and 2629 transitions. [2021-12-28 02:33:22,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-28 02:33:22,375 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:22,376 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:22,408 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-28 02:33:22,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-28 02:33:22,599 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:22,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:22,600 INFO L85 PathProgramCache]: Analyzing trace with hash -944406921, now seen corresponding path program 1 times [2021-12-28 02:33:22,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:22,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87885942] [2021-12-28 02:33:22,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:22,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:22,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:22,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:22,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:22,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:22,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:22,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:22,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:22,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:22,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:22,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:22,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:22,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:22,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:22,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:22,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:22,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-28 02:33:22,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:22,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-28 02:33:22,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:22,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-28 02:33:22,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:22,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-28 02:33:22,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:22,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:22,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:22,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:22,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:22,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-28 02:33:22,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:22,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-28 02:33:22,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:22,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-28 02:33:22,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:22,699 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-12-28 02:33:22,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:22,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87885942] [2021-12-28 02:33:22,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87885942] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:22,699 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:22,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 02:33:22,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634261445] [2021-12-28 02:33:22,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:22,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:33:22,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:22,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:33:22,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:33:22,701 INFO L87 Difference]: Start difference. First operand 2127 states and 2629 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-28 02:33:23,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:23,307 INFO L93 Difference]: Finished difference Result 2175 states and 2679 transitions. [2021-12-28 02:33:23,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:33:23,308 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 147 [2021-12-28 02:33:23,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:23,314 INFO L225 Difference]: With dead ends: 2175 [2021-12-28 02:33:23,315 INFO L226 Difference]: Without dead ends: 1801 [2021-12-28 02:33:23,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-28 02:33:23,318 INFO L933 BasicCegarLoop]: 675 mSDtfsCounter, 713 mSDsluCounter, 1223 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 725 SdHoareTripleChecker+Valid, 1898 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:23,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [725 Valid, 1898 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-28 02:33:23,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1801 states. [2021-12-28 02:33:23,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1801 to 1756. [2021-12-28 02:33:23,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1756 states, 1458 states have (on average 1.2688614540466392) internal successors, (1850), 1472 states have internal predecessors, (1850), 153 states have call successors, (153), 109 states have call predecessors, (153), 143 states have return successors, (204), 175 states have call predecessors, (204), 150 states have call successors, (204) [2021-12-28 02:33:23,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1756 states to 1756 states and 2207 transitions. [2021-12-28 02:33:23,419 INFO L78 Accepts]: Start accepts. Automaton has 1756 states and 2207 transitions. Word has length 147 [2021-12-28 02:33:23,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:23,419 INFO L470 AbstractCegarLoop]: Abstraction has 1756 states and 2207 transitions. [2021-12-28 02:33:23,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2021-12-28 02:33:23,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1756 states and 2207 transitions. [2021-12-28 02:33:23,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-28 02:33:23,423 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:23,423 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:23,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-28 02:33:23,423 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:23,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:23,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1309485723, now seen corresponding path program 1 times [2021-12-28 02:33:23,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:23,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720988524] [2021-12-28 02:33:23,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:23,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:23,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:23,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:23,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:23,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:23,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:23,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:23,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:23,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:23,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:23,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:23,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:23,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:23,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:23,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:23,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:23,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-28 02:33:23,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:23,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-28 02:33:23,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:23,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-28 02:33:23,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:23,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-28 02:33:23,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:23,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:23,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:23,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:23,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:23,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-28 02:33:23,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:23,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-28 02:33:23,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:23,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-28 02:33:23,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:23,521 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-28 02:33:23,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:23,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720988524] [2021-12-28 02:33:23,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720988524] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:23,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:23,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:33:23,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418760186] [2021-12-28 02:33:23,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:23,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:33:23,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:23,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:33:23,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:33:23,524 INFO L87 Difference]: Start difference. First operand 1756 states and 2207 transitions. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-28 02:33:24,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:24,264 INFO L93 Difference]: Finished difference Result 3022 states and 3706 transitions. [2021-12-28 02:33:24,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 02:33:24,265 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 159 [2021-12-28 02:33:24,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:24,271 INFO L225 Difference]: With dead ends: 3022 [2021-12-28 02:33:24,271 INFO L226 Difference]: Without dead ends: 1729 [2021-12-28 02:33:24,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:33:24,275 INFO L933 BasicCegarLoop]: 707 mSDtfsCounter, 641 mSDsluCounter, 1681 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 642 SdHoareTripleChecker+Valid, 2388 SdHoareTripleChecker+Invalid, 1030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:24,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [642 Valid, 2388 Invalid, 1030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 937 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-28 02:33:24,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1729 states. [2021-12-28 02:33:24,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1729 to 1645. [2021-12-28 02:33:24,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1645 states, 1371 states have (on average 1.2786287381473378) internal successors, (1753), 1385 states have internal predecessors, (1753), 141 states have call successors, (141), 99 states have call predecessors, (141), 131 states have return successors, (186), 161 states have call predecessors, (186), 138 states have call successors, (186) [2021-12-28 02:33:24,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1645 states to 1645 states and 2080 transitions. [2021-12-28 02:33:24,390 INFO L78 Accepts]: Start accepts. Automaton has 1645 states and 2080 transitions. Word has length 159 [2021-12-28 02:33:24,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:24,391 INFO L470 AbstractCegarLoop]: Abstraction has 1645 states and 2080 transitions. [2021-12-28 02:33:24,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 4 states have internal predecessors, (94), 3 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-12-28 02:33:24,391 INFO L276 IsEmpty]: Start isEmpty. Operand 1645 states and 2080 transitions. [2021-12-28 02:33:24,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-28 02:33:24,394 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:24,394 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:24,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-28 02:33:24,394 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:24,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:24,395 INFO L85 PathProgramCache]: Analyzing trace with hash 15680806, now seen corresponding path program 1 times [2021-12-28 02:33:24,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:24,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985633078] [2021-12-28 02:33:24,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:24,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:24,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:24,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:24,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:24,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:24,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:24,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:24,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:24,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:24,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:24,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:24,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:24,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:24,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:24,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:24,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:24,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-28 02:33:24,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:24,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-28 02:33:24,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:24,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-28 02:33:24,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:24,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-28 02:33:24,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:24,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:24,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:24,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:24,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:24,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-28 02:33:24,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:24,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-28 02:33:24,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:24,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-28 02:33:24,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:24,548 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-28 02:33:24,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:24,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985633078] [2021-12-28 02:33:24,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985633078] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:33:24,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309835705] [2021-12-28 02:33:24,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:24,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:33:24,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:33:24,551 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 02:33:24,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-28 02:33:24,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:24,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-28 02:33:24,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:33:24,968 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 61 proven. 2 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-28 02:33:24,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 02:33:25,431 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-12-28 02:33:25,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309835705] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 02:33:25,432 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 02:33:25,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2021-12-28 02:33:25,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108196940] [2021-12-28 02:33:25,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 02:33:25,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-28 02:33:25,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:25,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-28 02:33:25,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-12-28 02:33:25,434 INFO L87 Difference]: Start difference. First operand 1645 states and 2080 transitions. Second operand has 14 states, 14 states have (on average 17.571428571428573) internal successors, (246), 12 states have internal predecessors, (246), 6 states have call successors, (38), 8 states have call predecessors, (38), 10 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) [2021-12-28 02:33:26,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:26,747 INFO L93 Difference]: Finished difference Result 3381 states and 4219 transitions. [2021-12-28 02:33:26,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-28 02:33:26,748 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 17.571428571428573) internal successors, (246), 12 states have internal predecessors, (246), 6 states have call successors, (38), 8 states have call predecessors, (38), 10 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) Word has length 162 [2021-12-28 02:33:26,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:26,753 INFO L225 Difference]: With dead ends: 3381 [2021-12-28 02:33:26,753 INFO L226 Difference]: Without dead ends: 2036 [2021-12-28 02:33:26,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 354 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=232, Invalid=638, Unknown=0, NotChecked=0, Total=870 [2021-12-28 02:33:26,757 INFO L933 BasicCegarLoop]: 643 mSDtfsCounter, 2511 mSDsluCounter, 1914 mSDsCounter, 0 mSdLazyCounter, 1637 mSolverCounterSat, 440 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2542 SdHoareTripleChecker+Valid, 2557 SdHoareTripleChecker+Invalid, 2077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 440 IncrementalHoareTripleChecker+Valid, 1637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:26,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2542 Valid, 2557 Invalid, 2077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [440 Valid, 1637 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-28 02:33:26,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2036 states. [2021-12-28 02:33:26,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2036 to 1923. [2021-12-28 02:33:26,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1923 states, 1574 states have (on average 1.2426937738246506) internal successors, (1956), 1589 states have internal predecessors, (1956), 181 states have call successors, (181), 137 states have call predecessors, (181), 166 states have return successors, (255), 197 states have call predecessors, (255), 178 states have call successors, (255) [2021-12-28 02:33:26,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1923 states to 1923 states and 2392 transitions. [2021-12-28 02:33:26,857 INFO L78 Accepts]: Start accepts. Automaton has 1923 states and 2392 transitions. Word has length 162 [2021-12-28 02:33:26,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:26,858 INFO L470 AbstractCegarLoop]: Abstraction has 1923 states and 2392 transitions. [2021-12-28 02:33:26,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 17.571428571428573) internal successors, (246), 12 states have internal predecessors, (246), 6 states have call successors, (38), 8 states have call predecessors, (38), 10 states have return successors, (35), 6 states have call predecessors, (35), 6 states have call successors, (35) [2021-12-28 02:33:26,858 INFO L276 IsEmpty]: Start isEmpty. Operand 1923 states and 2392 transitions. [2021-12-28 02:33:26,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-28 02:33:26,861 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:26,861 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:26,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-28 02:33:27,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-28 02:33:27,088 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:27,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:27,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1202886558, now seen corresponding path program 1 times [2021-12-28 02:33:27,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:27,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387517044] [2021-12-28 02:33:27,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:27,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:27,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:27,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:27,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:27,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:33:27,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:27,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 02:33:27,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:27,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-28 02:33:27,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:27,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-28 02:33:27,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:27,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:27,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:27,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387517044] [2021-12-28 02:33:27,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387517044] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:27,218 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:27,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 02:33:27,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573300893] [2021-12-28 02:33:27,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:27,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 02:33:27,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:27,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 02:33:27,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 02:33:27,221 INFO L87 Difference]: Start difference. First operand 1923 states and 2392 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 3 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:33:28,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:28,606 INFO L93 Difference]: Finished difference Result 2406 states and 3174 transitions. [2021-12-28 02:33:28,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:33:28,607 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 3 states have internal predecessors, (157), 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 168 [2021-12-28 02:33:28,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:28,613 INFO L225 Difference]: With dead ends: 2406 [2021-12-28 02:33:28,613 INFO L226 Difference]: Without dead ends: 2054 [2021-12-28 02:33:28,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-28 02:33:28,615 INFO L933 BasicCegarLoop]: 748 mSDtfsCounter, 1070 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1093 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:28,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1093 Valid, 1296 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-28 02:33:28,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2054 states. [2021-12-28 02:33:28,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2054 to 1923. [2021-12-28 02:33:28,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1923 states, 1574 states have (on average 1.2420584498094027) internal successors, (1955), 1589 states have internal predecessors, (1955), 181 states have call successors, (181), 137 states have call predecessors, (181), 166 states have return successors, (255), 197 states have call predecessors, (255), 178 states have call successors, (255) [2021-12-28 02:33:28,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1923 states to 1923 states and 2391 transitions. [2021-12-28 02:33:28,759 INFO L78 Accepts]: Start accepts. Automaton has 1923 states and 2391 transitions. Word has length 168 [2021-12-28 02:33:28,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:28,759 INFO L470 AbstractCegarLoop]: Abstraction has 1923 states and 2391 transitions. [2021-12-28 02:33:28,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 3 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:33:28,760 INFO L276 IsEmpty]: Start isEmpty. Operand 1923 states and 2391 transitions. [2021-12-28 02:33:28,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-28 02:33:28,762 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:28,762 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:28,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-28 02:33:28,763 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:28,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:28,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1870268448, now seen corresponding path program 1 times [2021-12-28 02:33:28,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:28,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56884511] [2021-12-28 02:33:28,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:28,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:28,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:28,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:28,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:28,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:33:28,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:28,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 02:33:28,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:28,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-28 02:33:28,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:28,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-28 02:33:28,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:28,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:28,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:28,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56884511] [2021-12-28 02:33:28,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56884511] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:28,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:28,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 02:33:28,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10236487] [2021-12-28 02:33:28,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:28,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 02:33:28,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:28,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 02:33:28,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 02:33:28,885 INFO L87 Difference]: Start difference. First operand 1923 states and 2391 transitions. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 3 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:33:30,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:30,216 INFO L93 Difference]: Finished difference Result 2398 states and 3157 transitions. [2021-12-28 02:33:30,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:33:30,216 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 3 states have internal predecessors, (157), 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 168 [2021-12-28 02:33:30,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:30,223 INFO L225 Difference]: With dead ends: 2398 [2021-12-28 02:33:30,224 INFO L226 Difference]: Without dead ends: 2054 [2021-12-28 02:33:30,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-28 02:33:30,226 INFO L933 BasicCegarLoop]: 747 mSDtfsCounter, 1061 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1084 SdHoareTripleChecker+Valid, 1294 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:30,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1084 Valid, 1294 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-28 02:33:30,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2054 states. [2021-12-28 02:33:30,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2054 to 1923. [2021-12-28 02:33:30,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1923 states, 1574 states have (on average 1.241423125794155) internal successors, (1954), 1589 states have internal predecessors, (1954), 181 states have call successors, (181), 137 states have call predecessors, (181), 166 states have return successors, (255), 197 states have call predecessors, (255), 178 states have call successors, (255) [2021-12-28 02:33:30,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1923 states to 1923 states and 2390 transitions. [2021-12-28 02:33:30,371 INFO L78 Accepts]: Start accepts. Automaton has 1923 states and 2390 transitions. Word has length 168 [2021-12-28 02:33:30,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:30,372 INFO L470 AbstractCegarLoop]: Abstraction has 1923 states and 2390 transitions. [2021-12-28 02:33:30,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 3 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:33:30,372 INFO L276 IsEmpty]: Start isEmpty. Operand 1923 states and 2390 transitions. [2021-12-28 02:33:30,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-28 02:33:30,374 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:30,375 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:30,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-28 02:33:30,375 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:30,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:30,375 INFO L85 PathProgramCache]: Analyzing trace with hash 978117982, now seen corresponding path program 1 times [2021-12-28 02:33:30,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:30,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950267994] [2021-12-28 02:33:30,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:30,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:30,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:30,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:30,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:30,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:33:30,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:30,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 02:33:30,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:30,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-28 02:33:30,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:30,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-28 02:33:30,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:30,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:30,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:30,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950267994] [2021-12-28 02:33:30,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950267994] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:30,503 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:30,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 02:33:30,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325209690] [2021-12-28 02:33:30,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:30,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:33:30,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:30,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:33:30,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:33:30,505 INFO L87 Difference]: Start difference. First operand 1923 states and 2390 transitions. Second operand has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:33:32,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:32,860 INFO L93 Difference]: Finished difference Result 2881 states and 3941 transitions. [2021-12-28 02:33:32,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 02:33:32,860 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 4 states have internal predecessors, (157), 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 168 [2021-12-28 02:33:32,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:32,867 INFO L225 Difference]: With dead ends: 2881 [2021-12-28 02:33:32,867 INFO L226 Difference]: Without dead ends: 2541 [2021-12-28 02:33:32,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:33:32,870 INFO L933 BasicCegarLoop]: 785 mSDtfsCounter, 1668 mSDsluCounter, 1073 mSDsCounter, 0 mSdLazyCounter, 1980 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1696 SdHoareTripleChecker+Valid, 1858 SdHoareTripleChecker+Invalid, 2134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:32,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1696 Valid, 1858 Invalid, 2134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1980 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-28 02:33:32,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2541 states. [2021-12-28 02:33:33,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2541 to 2278. [2021-12-28 02:33:33,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2278 states, 1902 states have (on average 1.3033648790746581) internal successors, (2479), 1918 states have internal predecessors, (2479), 201 states have call successors, (201), 143 states have call predecessors, (201), 173 states have return successors, (278), 217 states have call predecessors, (278), 198 states have call successors, (278) [2021-12-28 02:33:33,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2278 states to 2278 states and 2958 transitions. [2021-12-28 02:33:33,036 INFO L78 Accepts]: Start accepts. Automaton has 2278 states and 2958 transitions. Word has length 168 [2021-12-28 02:33:33,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:33,036 INFO L470 AbstractCegarLoop]: Abstraction has 2278 states and 2958 transitions. [2021-12-28 02:33:33,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:33:33,036 INFO L276 IsEmpty]: Start isEmpty. Operand 2278 states and 2958 transitions. [2021-12-28 02:33:33,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-28 02:33:33,039 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:33,039 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:33,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-28 02:33:33,039 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:33,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:33,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1900518490, now seen corresponding path program 1 times [2021-12-28 02:33:33,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:33,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635906298] [2021-12-28 02:33:33,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:33,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:33,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:33,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:33,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:33,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:33:33,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:33,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 02:33:33,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:33,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-28 02:33:33,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:33,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-28 02:33:33,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:33,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:33,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:33,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635906298] [2021-12-28 02:33:33,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635906298] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:33,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:33,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:33:33,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11669114] [2021-12-28 02:33:33,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:33,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:33:33,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:33,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:33:33,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:33:33,182 INFO L87 Difference]: Start difference. First operand 2278 states and 2958 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:33:36,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:36,128 INFO L93 Difference]: Finished difference Result 3739 states and 5326 transitions. [2021-12-28 02:33:36,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:33:36,130 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 168 [2021-12-28 02:33:36,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:36,136 INFO L225 Difference]: With dead ends: 3739 [2021-12-28 02:33:36,137 INFO L226 Difference]: Without dead ends: 3044 [2021-12-28 02:33:36,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-28 02:33:36,139 INFO L933 BasicCegarLoop]: 1074 mSDtfsCounter, 1696 mSDsluCounter, 2032 mSDsCounter, 0 mSdLazyCounter, 3096 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1724 SdHoareTripleChecker+Valid, 3106 SdHoareTripleChecker+Invalid, 3212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 3096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:36,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1724 Valid, 3106 Invalid, 3212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 3096 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-28 02:33:36,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3044 states. [2021-12-28 02:33:36,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3044 to 2608. [2021-12-28 02:33:36,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2608 states, 2205 states have (on average 1.3396825396825396) internal successors, (2954), 2222 states have internal predecessors, (2954), 221 states have call successors, (221), 149 states have call predecessors, (221), 180 states have return successors, (300), 238 states have call predecessors, (300), 218 states have call successors, (300) [2021-12-28 02:33:36,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2608 states to 2608 states and 3475 transitions. [2021-12-28 02:33:36,332 INFO L78 Accepts]: Start accepts. Automaton has 2608 states and 3475 transitions. Word has length 168 [2021-12-28 02:33:36,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:36,332 INFO L470 AbstractCegarLoop]: Abstraction has 2608 states and 3475 transitions. [2021-12-28 02:33:36,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:33:36,333 INFO L276 IsEmpty]: Start isEmpty. Operand 2608 states and 3475 transitions. [2021-12-28 02:33:36,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-28 02:33:36,336 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:36,336 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:36,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-28 02:33:36,336 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:36,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:36,337 INFO L85 PathProgramCache]: Analyzing trace with hash -497469348, now seen corresponding path program 1 times [2021-12-28 02:33:36,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:36,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125731856] [2021-12-28 02:33:36,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:36,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:36,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:36,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:36,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:36,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:33:36,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:36,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 02:33:36,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:36,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-28 02:33:36,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:36,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-28 02:33:36,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:36,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:36,470 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:36,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125731856] [2021-12-28 02:33:36,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125731856] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:36,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:36,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:33:36,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11807726] [2021-12-28 02:33:36,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:36,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:33:36,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:36,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:33:36,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:33:36,472 INFO L87 Difference]: Start difference. First operand 2608 states and 3475 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:33:37,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:37,938 INFO L93 Difference]: Finished difference Result 4083 states and 5879 transitions. [2021-12-28 02:33:37,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:33:37,938 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 168 [2021-12-28 02:33:37,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:37,946 INFO L225 Difference]: With dead ends: 4083 [2021-12-28 02:33:37,946 INFO L226 Difference]: Without dead ends: 3058 [2021-12-28 02:33:37,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:33:37,952 INFO L933 BasicCegarLoop]: 723 mSDtfsCounter, 1471 mSDsluCounter, 867 mSDsCounter, 0 mSdLazyCounter, 1344 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1500 SdHoareTripleChecker+Valid, 1590 SdHoareTripleChecker+Invalid, 1507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 1344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:37,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1500 Valid, 1590 Invalid, 1507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 1344 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-28 02:33:37,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3058 states. [2021-12-28 02:33:38,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3058 to 2608. [2021-12-28 02:33:38,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2608 states, 2205 states have (on average 1.3383219954648526) internal successors, (2951), 2222 states have internal predecessors, (2951), 221 states have call successors, (221), 149 states have call predecessors, (221), 180 states have return successors, (300), 238 states have call predecessors, (300), 218 states have call successors, (300) [2021-12-28 02:33:38,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2608 states to 2608 states and 3472 transitions. [2021-12-28 02:33:38,148 INFO L78 Accepts]: Start accepts. Automaton has 2608 states and 3472 transitions. Word has length 168 [2021-12-28 02:33:38,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:38,148 INFO L470 AbstractCegarLoop]: Abstraction has 2608 states and 3472 transitions. [2021-12-28 02:33:38,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:33:38,148 INFO L276 IsEmpty]: Start isEmpty. Operand 2608 states and 3472 transitions. [2021-12-28 02:33:38,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-28 02:33:38,151 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:38,151 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:38,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-28 02:33:38,152 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:38,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:38,152 INFO L85 PathProgramCache]: Analyzing trace with hash -70914850, now seen corresponding path program 1 times [2021-12-28 02:33:38,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:38,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487483713] [2021-12-28 02:33:38,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:38,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:38,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:38,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:38,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:38,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:33:38,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:38,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 02:33:38,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:38,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-28 02:33:38,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:38,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-28 02:33:38,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:38,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:38,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:38,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487483713] [2021-12-28 02:33:38,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487483713] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:38,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:38,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:33:38,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637192374] [2021-12-28 02:33:38,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:38,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:33:38,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:38,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:33:38,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:33:38,267 INFO L87 Difference]: Start difference. First operand 2608 states and 3472 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:33:39,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:39,863 INFO L93 Difference]: Finished difference Result 4079 states and 5862 transitions. [2021-12-28 02:33:39,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:33:39,864 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 168 [2021-12-28 02:33:39,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:39,871 INFO L225 Difference]: With dead ends: 4079 [2021-12-28 02:33:39,871 INFO L226 Difference]: Without dead ends: 3054 [2021-12-28 02:33:39,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:33:39,875 INFO L933 BasicCegarLoop]: 719 mSDtfsCounter, 1469 mSDsluCounter, 867 mSDsCounter, 0 mSdLazyCounter, 1334 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1498 SdHoareTripleChecker+Valid, 1586 SdHoareTripleChecker+Invalid, 1497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 1334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:39,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1498 Valid, 1586 Invalid, 1497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 1334 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-28 02:33:39,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3054 states. [2021-12-28 02:33:40,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3054 to 2608. [2021-12-28 02:33:40,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2608 states, 2205 states have (on average 1.3369614512471655) internal successors, (2948), 2222 states have internal predecessors, (2948), 221 states have call successors, (221), 149 states have call predecessors, (221), 180 states have return successors, (300), 238 states have call predecessors, (300), 218 states have call successors, (300) [2021-12-28 02:33:40,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2608 states to 2608 states and 3469 transitions. [2021-12-28 02:33:40,085 INFO L78 Accepts]: Start accepts. Automaton has 2608 states and 3469 transitions. Word has length 168 [2021-12-28 02:33:40,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:40,086 INFO L470 AbstractCegarLoop]: Abstraction has 2608 states and 3469 transitions. [2021-12-28 02:33:40,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:33:40,086 INFO L276 IsEmpty]: Start isEmpty. Operand 2608 states and 3469 transitions. [2021-12-28 02:33:40,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-28 02:33:40,088 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:40,088 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:40,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-28 02:33:40,089 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:40,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:40,089 INFO L85 PathProgramCache]: Analyzing trace with hash -611344356, now seen corresponding path program 1 times [2021-12-28 02:33:40,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:40,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249577607] [2021-12-28 02:33:40,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:40,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:40,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:40,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:40,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:40,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:33:40,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:40,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 02:33:40,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:40,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-28 02:33:40,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:40,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-28 02:33:40,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:40,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:40,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:40,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249577607] [2021-12-28 02:33:40,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249577607] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:40,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:40,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:33:40,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579107096] [2021-12-28 02:33:40,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:40,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:33:40,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:40,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:33:40,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:33:40,238 INFO L87 Difference]: Start difference. First operand 2608 states and 3469 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:33:42,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:42,978 INFO L93 Difference]: Finished difference Result 4995 states and 7307 transitions. [2021-12-28 02:33:42,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:33:42,983 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 168 [2021-12-28 02:33:42,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:43,008 INFO L225 Difference]: With dead ends: 4995 [2021-12-28 02:33:43,008 INFO L226 Difference]: Without dead ends: 3970 [2021-12-28 02:33:43,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-28 02:33:43,015 INFO L933 BasicCegarLoop]: 813 mSDtfsCounter, 1774 mSDsluCounter, 1404 mSDsCounter, 0 mSdLazyCounter, 2735 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1802 SdHoareTripleChecker+Valid, 2217 SdHoareTripleChecker+Invalid, 2891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 2735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:43,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1802 Valid, 2217 Invalid, 2891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 2735 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-28 02:33:43,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3970 states. [2021-12-28 02:33:43,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3970 to 3278. [2021-12-28 02:33:43,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3278 states, 2821 states have (on average 1.3856788372917406) internal successors, (3909), 2840 states have internal predecessors, (3909), 261 states have call successors, (261), 161 states have call predecessors, (261), 194 states have return successors, (348), 280 states have call predecessors, (348), 258 states have call successors, (348) [2021-12-28 02:33:43,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3278 states to 3278 states and 4518 transitions. [2021-12-28 02:33:43,324 INFO L78 Accepts]: Start accepts. Automaton has 3278 states and 4518 transitions. Word has length 168 [2021-12-28 02:33:43,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:43,325 INFO L470 AbstractCegarLoop]: Abstraction has 3278 states and 4518 transitions. [2021-12-28 02:33:43,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:33:43,325 INFO L276 IsEmpty]: Start isEmpty. Operand 3278 states and 4518 transitions. [2021-12-28 02:33:43,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-28 02:33:43,328 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:43,328 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:43,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-28 02:33:43,328 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:43,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:43,329 INFO L85 PathProgramCache]: Analyzing trace with hash -767324898, now seen corresponding path program 1 times [2021-12-28 02:33:43,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:43,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875909449] [2021-12-28 02:33:43,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:43,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:43,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:43,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:43,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:43,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:33:43,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:43,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 02:33:43,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:43,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-28 02:33:43,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:43,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-28 02:33:43,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:43,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:43,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:43,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875909449] [2021-12-28 02:33:43,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875909449] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:43,463 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:43,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:33:43,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559207338] [2021-12-28 02:33:43,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:43,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:33:43,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:43,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:33:43,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:33:43,465 INFO L87 Difference]: Start difference. First operand 3278 states and 4518 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:33:45,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:45,203 INFO L93 Difference]: Finished difference Result 5651 states and 8343 transitions. [2021-12-28 02:33:45,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:33:45,203 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 168 [2021-12-28 02:33:45,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:45,212 INFO L225 Difference]: With dead ends: 5651 [2021-12-28 02:33:45,212 INFO L226 Difference]: Without dead ends: 3956 [2021-12-28 02:33:45,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:33:45,217 INFO L933 BasicCegarLoop]: 712 mSDtfsCounter, 1262 mSDsluCounter, 1108 mSDsCounter, 0 mSdLazyCounter, 1483 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1291 SdHoareTripleChecker+Valid, 1820 SdHoareTripleChecker+Invalid, 1604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:45,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1291 Valid, 1820 Invalid, 1604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1483 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-28 02:33:45,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3956 states. [2021-12-28 02:33:45,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3956 to 3278. [2021-12-28 02:33:45,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3278 states, 2821 states have (on average 1.3839064161644807) internal successors, (3904), 2840 states have internal predecessors, (3904), 261 states have call successors, (261), 161 states have call predecessors, (261), 194 states have return successors, (348), 280 states have call predecessors, (348), 258 states have call successors, (348) [2021-12-28 02:33:45,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3278 states to 3278 states and 4513 transitions. [2021-12-28 02:33:45,476 INFO L78 Accepts]: Start accepts. Automaton has 3278 states and 4513 transitions. Word has length 168 [2021-12-28 02:33:45,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:45,477 INFO L470 AbstractCegarLoop]: Abstraction has 3278 states and 4513 transitions. [2021-12-28 02:33:45,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:33:45,477 INFO L276 IsEmpty]: Start isEmpty. Operand 3278 states and 4513 transitions. [2021-12-28 02:33:45,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-12-28 02:33:45,480 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:45,480 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:45,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-28 02:33:45,480 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:45,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:45,481 INFO L85 PathProgramCache]: Analyzing trace with hash -356714532, now seen corresponding path program 1 times [2021-12-28 02:33:45,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:45,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922009349] [2021-12-28 02:33:45,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:45,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:45,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:45,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:45,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:45,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-28 02:33:45,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:45,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 02:33:45,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:45,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2021-12-28 02:33:45,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:45,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2021-12-28 02:33:45,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:45,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:45,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:45,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922009349] [2021-12-28 02:33:45,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922009349] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:45,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:45,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:33:45,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617378390] [2021-12-28 02:33:45,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:45,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:33:45,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:45,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:33:45,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:33:45,591 INFO L87 Difference]: Start difference. First operand 3278 states and 4513 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:33:48,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:48,937 INFO L93 Difference]: Finished difference Result 7429 states and 11132 transitions. [2021-12-28 02:33:48,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:33:48,937 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 5 states have internal predecessors, (157), 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 168 [2021-12-28 02:33:48,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:48,956 INFO L225 Difference]: With dead ends: 7429 [2021-12-28 02:33:48,956 INFO L226 Difference]: Without dead ends: 5734 [2021-12-28 02:33:48,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-28 02:33:48,965 INFO L933 BasicCegarLoop]: 1039 mSDtfsCounter, 1668 mSDsluCounter, 2032 mSDsCounter, 0 mSdLazyCounter, 3020 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1696 SdHoareTripleChecker+Valid, 3071 SdHoareTripleChecker+Invalid, 3138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 3020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:48,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1696 Valid, 3071 Invalid, 3138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 3020 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-28 02:33:48,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5734 states.