./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.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.12.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 a41d14195dc7825ea8ff849a910a7045aa33d6087daf5af287d6c34e44b1032a --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 02:32:58,332 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 02:32:58,334 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 02:32:58,374 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 02:32:58,375 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 02:32:58,377 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 02:32:58,378 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 02:32:58,381 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 02:32:58,383 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 02:32:58,386 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 02:32:58,387 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 02:32:58,388 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 02:32:58,388 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 02:32:58,390 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 02:32:58,390 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 02:32:58,394 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 02:32:58,395 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 02:32:58,396 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 02:32:58,397 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 02:32:58,401 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 02:32:58,402 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 02:32:58,403 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 02:32:58,404 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 02:32:58,405 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 02:32:58,409 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 02:32:58,410 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 02:32:58,410 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 02:32:58,411 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 02:32:58,411 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 02:32:58,412 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 02:32:58,412 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 02:32:58,413 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 02:32:58,414 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 02:32:58,414 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 02:32:58,415 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 02:32:58,415 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 02:32:58,416 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 02:32:58,416 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 02:32:58,416 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 02:32:58,417 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 02:32:58,418 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 02:32:58,421 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 02:32:58,448 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 02:32:58,449 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 02:32:58,449 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 02:32:58,450 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 02:32:58,450 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 02:32:58,450 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 02:32:58,451 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 02:32:58,452 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 02:32:58,452 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 02:32:58,452 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 02:32:58,453 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 02:32:58,453 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 02:32:58,453 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 02:32:58,453 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 02:32:58,453 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 02:32:58,453 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 02:32:58,454 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 02:32:58,454 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 02:32:58,454 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 02:32:58,454 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 02:32:58,454 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 02:32:58,454 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 02:32:58,454 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 02:32:58,455 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 02:32:58,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 02:32:58,455 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 02:32:58,455 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 02:32:58,455 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 02:32:58,455 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 02:32:58,456 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 02:32:58,456 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 02:32:58,456 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 02:32:58,456 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 02:32:58,456 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a41d14195dc7825ea8ff849a910a7045aa33d6087daf5af287d6c34e44b1032a [2021-12-28 02:32:58,774 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 02:32:58,800 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 02:32:58,802 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 02:32:58,803 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 02:32:58,804 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 02:32:58,805 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-1.c [2021-12-28 02:32:58,859 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb56dd36e/d00e4997ea224a3c963a4fbcca1f26ff/FLAG5e26334b6 [2021-12-28 02:32:59,279 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 02:32:59,279 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.12.cil-1.c [2021-12-28 02:32:59,295 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb56dd36e/d00e4997ea224a3c963a4fbcca1f26ff/FLAG5e26334b6 [2021-12-28 02:32:59,308 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cb56dd36e/d00e4997ea224a3c963a4fbcca1f26ff [2021-12-28 02:32:59,310 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 02:32:59,311 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 02:32:59,312 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 02:32:59,312 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 02:32:59,315 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 02:32:59,315 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 02:32:59" (1/1) ... [2021-12-28 02:32:59,316 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1882d1bc 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 02:32:59,316 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 02:32:59" (1/1) ... [2021-12-28 02:32:59,328 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 02:32:59,380 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 02:32:59,493 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.12.cil-1.c[914,927] [2021-12-28 02:32:59,577 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.12.cil-1.c[7115,7128] [2021-12-28 02:32:59,680 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 02:32:59,686 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 02:32:59,695 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.12.cil-1.c[914,927] [2021-12-28 02:32:59,715 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.12.cil-1.c[7115,7128] [2021-12-28 02:32:59,741 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 02:32:59,757 INFO L208 MainTranslator]: Completed translation [2021-12-28 02:32:59,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:32:59 WrapperNode [2021-12-28 02:32:59,757 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 02:32:59,758 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 02:32:59,758 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 02:32:59,758 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 02:32:59,762 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:32:59" (1/1) ... [2021-12-28 02:32:59,778 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:32:59" (1/1) ... [2021-12-28 02:32:59,836 INFO L137 Inliner]: procedures = 77, calls = 94, calls flagged for inlining = 45, calls inlined = 45, statements flattened = 1045 [2021-12-28 02:32:59,838 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 02:32:59,838 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 02:32:59,838 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 02:32:59,839 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 02:32:59,844 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:32:59" (1/1) ... [2021-12-28 02:32:59,844 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:32:59" (1/1) ... [2021-12-28 02:32:59,849 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:32:59" (1/1) ... [2021-12-28 02:32:59,849 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:32:59" (1/1) ... [2021-12-28 02:32:59,859 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:32:59" (1/1) ... [2021-12-28 02:32:59,878 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:32:59" (1/1) ... [2021-12-28 02:32:59,881 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:32:59" (1/1) ... [2021-12-28 02:32:59,886 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 02:32:59,886 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 02:32:59,887 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 02:32:59,887 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 02:32:59,887 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:32:59" (1/1) ... [2021-12-28 02:32:59,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 02:32:59,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:32:59,920 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 02:32:59,943 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 02:32:59,965 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 02:32:59,965 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-28 02:32:59,965 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-28 02:32:59,965 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-12-28 02:32:59,965 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-12-28 02:32:59,966 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-28 02:32:59,966 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-28 02:32:59,966 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-28 02:32:59,966 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-28 02:32:59,966 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-12-28 02:32:59,966 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-12-28 02:32:59,966 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-28 02:32:59,966 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-28 02:32:59,967 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-28 02:32:59,967 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-28 02:32:59,967 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-12-28 02:32:59,967 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-12-28 02:32:59,967 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-12-28 02:32:59,967 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-12-28 02:32:59,967 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-12-28 02:32:59,968 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-12-28 02:32:59,968 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-28 02:32:59,968 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-28 02:32:59,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 02:32:59,968 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-28 02:32:59,968 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-28 02:32:59,968 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-12-28 02:32:59,969 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-12-28 02:32:59,969 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 02:32:59,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 02:32:59,969 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-28 02:32:59,969 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-28 02:32:59,969 INFO L130 BoogieDeclarations]: Found specification of procedure error2 [2021-12-28 02:32:59,969 INFO L138 BoogieDeclarations]: Found implementation of procedure error2 [2021-12-28 02:33:00,066 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 02:33:00,068 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 02:33:00,790 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 02:33:00,801 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 02:33:00,802 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2021-12-28 02:33:00,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 02:33:00 BoogieIcfgContainer [2021-12-28 02:33:00,804 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 02:33:00,805 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 02:33:00,805 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 02:33:00,807 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 02:33:00,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 02:32:59" (1/3) ... [2021-12-28 02:33:00,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@760e4a1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 02:33:00, skipping insertion in model container [2021-12-28 02:33:00,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:32:59" (2/3) ... [2021-12-28 02:33:00,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@760e4a1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 02:33:00, skipping insertion in model container [2021-12-28 02:33:00,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 02:33:00" (3/3) ... [2021-12-28 02:33:00,809 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.12.cil-1.c [2021-12-28 02:33:00,812 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 02:33:00,813 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-28 02:33:00,849 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 02:33:00,854 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 02:33:00,854 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-28 02:33:00,875 INFO L276 IsEmpty]: Start isEmpty. Operand has 491 states, 431 states have (on average 1.6450116009280742) internal successors, (709), 439 states have internal predecessors, (709), 42 states have call successors, (42), 15 states have call predecessors, (42), 15 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) [2021-12-28 02:33:00,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:33:00,883 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:00,883 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 02:33:00,884 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:00,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:00,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1117056757, now seen corresponding path program 1 times [2021-12-28 02:33:00,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:00,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994387303] [2021-12-28 02:33:00,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:00,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:01,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:01,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:01,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:01,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:01,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:01,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:01,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:01,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:01,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:01,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:01,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:01,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:01,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:01,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:01,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:01,229 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 02:33:01,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:01,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994387303] [2021-12-28 02:33:01,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994387303] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:01,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:01,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 02:33:01,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14835551] [2021-12-28 02:33:01,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:01,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 02:33:01,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:01,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 02:33:01,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:33:01,253 INFO L87 Difference]: Start difference. First operand has 491 states, 431 states have (on average 1.6450116009280742) internal successors, (709), 439 states have internal predecessors, (709), 42 states have call successors, (42), 15 states have call predecessors, (42), 15 states have return successors, (42), 40 states have call predecessors, (42), 42 states have call successors, (42) Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 5 states have internal predecessors, (50), 3 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-12-28 02:33:02,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:02,251 INFO L93 Difference]: Finished difference Result 1088 states and 1744 transitions. [2021-12-28 02:33:02,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:33:02,254 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 02:33:02,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:02,265 INFO L225 Difference]: With dead ends: 1088 [2021-12-28 02:33:02,265 INFO L226 Difference]: Without dead ends: 615 [2021-12-28 02:33:02,270 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 02:33:02,272 INFO L933 BasicCegarLoop]: 752 mSDtfsCounter, 1212 mSDsluCounter, 1757 mSDsCounter, 0 mSdLazyCounter, 1110 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1217 SdHoareTripleChecker+Valid, 2509 SdHoareTripleChecker+Invalid, 1311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 1110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:02,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1217 Valid, 2509 Invalid, 1311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 1110 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-28 02:33:02,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-12-28 02:33:02,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 576. [2021-12-28 02:33:02,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 499 states have (on average 1.531062124248497) internal successors, (764), 506 states have internal predecessors, (764), 53 states have call successors, (53), 22 states have call predecessors, (53), 22 states have return successors, (54), 50 states have call predecessors, (54), 49 states have call successors, (54) [2021-12-28 02:33:02,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 871 transitions. [2021-12-28 02:33:02,332 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 871 transitions. Word has length 65 [2021-12-28 02:33:02,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:02,332 INFO L470 AbstractCegarLoop]: Abstraction has 576 states and 871 transitions. [2021-12-28 02:33:02,333 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 02:33:02,333 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 871 transitions. [2021-12-28 02:33:02,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:33:02,343 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:02,343 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 02:33:02,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 02:33:02,343 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:02,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:02,344 INFO L85 PathProgramCache]: Analyzing trace with hash -713270806, now seen corresponding path program 1 times [2021-12-28 02:33:02,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:02,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83964077] [2021-12-28 02:33:02,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:02,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:02,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:02,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:02,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:02,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:02,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:02,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:02,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:02,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:02,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:02,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:02,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:02,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:02,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:02,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:02,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:02,465 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 02:33:02,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:02,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83964077] [2021-12-28 02:33:02,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83964077] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:02,466 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:02,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 02:33:02,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800602095] [2021-12-28 02:33:02,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:02,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 02:33:02,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:02,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 02:33:02,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:33:02,468 INFO L87 Difference]: Start difference. First operand 576 states and 871 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 02:33:03,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:03,418 INFO L93 Difference]: Finished difference Result 923 states and 1348 transitions. [2021-12-28 02:33:03,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-28 02:33:03,418 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 02:33:03,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:03,423 INFO L225 Difference]: With dead ends: 923 [2021-12-28 02:33:03,423 INFO L226 Difference]: Without dead ends: 746 [2021-12-28 02:33:03,425 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 02:33:03,426 INFO L933 BasicCegarLoop]: 784 mSDtfsCounter, 1861 mSDsluCounter, 1578 mSDsCounter, 0 mSdLazyCounter, 1268 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1893 SdHoareTripleChecker+Valid, 2362 SdHoareTripleChecker+Invalid, 1472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 1268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:03,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1893 Valid, 2362 Invalid, 1472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 1268 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-28 02:33:03,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2021-12-28 02:33:03,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 672. [2021-12-28 02:33:03,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 575 states have (on average 1.5095652173913043) internal successors, (868), 584 states have internal predecessors, (868), 64 states have call successors, (64), 29 states have call predecessors, (64), 31 states have return successors, (73), 62 states have call predecessors, (73), 60 states have call successors, (73) [2021-12-28 02:33:03,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 1005 transitions. [2021-12-28 02:33:03,463 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 1005 transitions. Word has length 65 [2021-12-28 02:33:03,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:03,464 INFO L470 AbstractCegarLoop]: Abstraction has 672 states and 1005 transitions. [2021-12-28 02:33:03,464 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 02:33:03,464 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 1005 transitions. [2021-12-28 02:33:03,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:33:03,467 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:03,467 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 02:33:03,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 02:33:03,467 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:03,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:03,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1553110380, now seen corresponding path program 1 times [2021-12-28 02:33:03,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:03,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602392453] [2021-12-28 02:33:03,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:03,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:03,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:03,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:03,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:03,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:03,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:03,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:03,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:03,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:03,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:03,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:03,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:03,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:03,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:03,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:03,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:03,584 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 02:33:03,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:03,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602392453] [2021-12-28 02:33:03,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602392453] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:03,585 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:03,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 02:33:03,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941296778] [2021-12-28 02:33:03,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:03,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 02:33:03,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:03,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 02:33:03,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-28 02:33:03,587 INFO L87 Difference]: Start difference. First operand 672 states and 1005 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 02:33:04,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:04,752 INFO L93 Difference]: Finished difference Result 973 states and 1419 transitions. [2021-12-28 02:33:04,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-28 02:33:04,752 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 02:33:04,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:04,755 INFO L225 Difference]: With dead ends: 973 [2021-12-28 02:33:04,755 INFO L226 Difference]: Without dead ends: 706 [2021-12-28 02:33:04,756 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 02:33:04,757 INFO L933 BasicCegarLoop]: 727 mSDtfsCounter, 971 mSDsluCounter, 2175 mSDsCounter, 0 mSdLazyCounter, 1637 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 972 SdHoareTripleChecker+Valid, 2902 SdHoareTripleChecker+Invalid, 1784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:04,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [972 Valid, 2902 Invalid, 1784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1637 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-28 02:33:04,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2021-12-28 02:33:04,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 677. [2021-12-28 02:33:04,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 579 states have (on average 1.5025906735751295) internal successors, (870), 588 states have internal predecessors, (870), 64 states have call successors, (64), 29 states have call predecessors, (64), 32 states have return successors, (74), 63 states have call predecessors, (74), 60 states have call successors, (74) [2021-12-28 02:33:04,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 1008 transitions. [2021-12-28 02:33:04,779 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 1008 transitions. Word has length 65 [2021-12-28 02:33:04,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:04,780 INFO L470 AbstractCegarLoop]: Abstraction has 677 states and 1008 transitions. [2021-12-28 02:33:04,780 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 02:33:04,780 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 1008 transitions. [2021-12-28 02:33:04,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:33:04,782 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:04,782 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 02:33:04,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 02:33:04,782 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:04,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:04,783 INFO L85 PathProgramCache]: Analyzing trace with hash 523751082, now seen corresponding path program 1 times [2021-12-28 02:33:04,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:04,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073021159] [2021-12-28 02:33:04,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:04,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:04,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:04,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:04,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:04,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:04,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:04,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:04,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:04,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:04,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:04,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:04,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:04,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:04,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:04,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:04,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:04,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:04,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:04,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073021159] [2021-12-28 02:33:04,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073021159] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:04,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:04,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-28 02:33:04,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376203439] [2021-12-28 02:33:04,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:04,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 02:33:04,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:04,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 02:33:04,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-28 02:33:04,882 INFO L87 Difference]: Start difference. First operand 677 states and 1008 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 02:33:06,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:06,325 INFO L93 Difference]: Finished difference Result 1999 states and 2804 transitions. [2021-12-28 02:33:06,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-28 02:33:06,326 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 02:33:06,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:06,332 INFO L225 Difference]: With dead ends: 1999 [2021-12-28 02:33:06,332 INFO L226 Difference]: Without dead ends: 1709 [2021-12-28 02:33:06,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=1075, Unknown=0, NotChecked=0, Total=1332 [2021-12-28 02:33:06,335 INFO L933 BasicCegarLoop]: 829 mSDtfsCounter, 3634 mSDsluCounter, 2194 mSDsCounter, 0 mSdLazyCounter, 1708 mSolverCounterSat, 634 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3648 SdHoareTripleChecker+Valid, 3023 SdHoareTripleChecker+Invalid, 2342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 634 IncrementalHoareTripleChecker+Valid, 1708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:06,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3648 Valid, 3023 Invalid, 2342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [634 Valid, 1708 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-28 02:33:06,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1709 states. [2021-12-28 02:33:06,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1709 to 1578. [2021-12-28 02:33:06,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1578 states, 1294 states have (on average 1.3979907264296754) internal successors, (1809), 1318 states have internal predecessors, (1809), 152 states have call successors, (152), 112 states have call predecessors, (152), 130 states have return successors, (188), 150 states have call predecessors, (188), 148 states have call successors, (188) [2021-12-28 02:33:06,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 2149 transitions. [2021-12-28 02:33:06,407 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 2149 transitions. Word has length 65 [2021-12-28 02:33:06,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:06,408 INFO L470 AbstractCegarLoop]: Abstraction has 1578 states and 2149 transitions. [2021-12-28 02:33:06,408 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 02:33:06,408 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 2149 transitions. [2021-12-28 02:33:06,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:33:06,409 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:06,409 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 02:33:06,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 02:33:06,410 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:06,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:06,410 INFO L85 PathProgramCache]: Analyzing trace with hash 116960512, now seen corresponding path program 1 times [2021-12-28 02:33:06,410 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:06,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154576883] [2021-12-28 02:33:06,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:06,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:06,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:06,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:06,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:06,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:06,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:06,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:06,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:06,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:06,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:06,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:06,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:06,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:06,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:06,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:06,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:06,566 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 02:33:06,566 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:06,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154576883] [2021-12-28 02:33:06,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154576883] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:06,567 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:06,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 02:33:06,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994963702] [2021-12-28 02:33:06,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:06,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 02:33:06,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:06,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 02:33:06,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-28 02:33:06,568 INFO L87 Difference]: Start difference. First operand 1578 states and 2149 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 02:33:07,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:07,561 INFO L93 Difference]: Finished difference Result 2869 states and 3822 transitions. [2021-12-28 02:33:07,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-28 02:33:07,562 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 02:33:07,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:07,567 INFO L225 Difference]: With dead ends: 2869 [2021-12-28 02:33:07,568 INFO L226 Difference]: Without dead ends: 1684 [2021-12-28 02:33:07,569 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 02:33:07,570 INFO L933 BasicCegarLoop]: 722 mSDtfsCounter, 652 mSDsluCounter, 2510 mSDsCounter, 0 mSdLazyCounter, 1669 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 654 SdHoareTripleChecker+Valid, 3232 SdHoareTripleChecker+Invalid, 1771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:07,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [654 Valid, 3232 Invalid, 1771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1669 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-28 02:33:07,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1684 states. [2021-12-28 02:33:07,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1684 to 1608. [2021-12-28 02:33:07,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1318 states have (on average 1.3846737481031866) internal successors, (1825), 1342 states have internal predecessors, (1825), 152 states have call successors, (152), 112 states have call predecessors, (152), 136 states have return successors, (194), 156 states have call predecessors, (194), 148 states have call successors, (194) [2021-12-28 02:33:07,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 2171 transitions. [2021-12-28 02:33:07,670 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 2171 transitions. Word has length 65 [2021-12-28 02:33:07,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:07,671 INFO L470 AbstractCegarLoop]: Abstraction has 1608 states and 2171 transitions. [2021-12-28 02:33:07,671 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 02:33:07,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 2171 transitions. [2021-12-28 02:33:07,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:33:07,672 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:07,672 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 02:33:07,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 02:33:07,672 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:07,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:07,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1503163906, now seen corresponding path program 1 times [2021-12-28 02:33:07,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:07,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834469493] [2021-12-28 02:33:07,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:07,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:07,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:07,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:07,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:07,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:07,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:07,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:07,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:07,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:07,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:07,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:07,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:07,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:07,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:07,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:07,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:07,788 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 02:33:07,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:07,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834469493] [2021-12-28 02:33:07,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834469493] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:07,789 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:07,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 02:33:07,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375982945] [2021-12-28 02:33:07,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:07,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 02:33:07,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:07,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 02:33:07,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:33:07,792 INFO L87 Difference]: Start difference. First operand 1608 states and 2171 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 02:33:08,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:08,623 INFO L93 Difference]: Finished difference Result 2863 states and 3718 transitions. [2021-12-28 02:33:08,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-28 02:33:08,624 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 02:33:08,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:08,630 INFO L225 Difference]: With dead ends: 2863 [2021-12-28 02:33:08,630 INFO L226 Difference]: Without dead ends: 1871 [2021-12-28 02:33:08,633 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 02:33:08,635 INFO L933 BasicCegarLoop]: 731 mSDtfsCounter, 1447 mSDsluCounter, 1758 mSDsCounter, 0 mSdLazyCounter, 1276 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1476 SdHoareTripleChecker+Valid, 2489 SdHoareTripleChecker+Invalid, 1425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 1276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:08,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1476 Valid, 2489 Invalid, 1425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 1276 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-28 02:33:08,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1871 states. [2021-12-28 02:33:08,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1871 to 1550. [2021-12-28 02:33:08,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1550 states, 1276 states have (on average 1.3824451410658307) internal successors, (1764), 1295 states have internal predecessors, (1764), 146 states have call successors, (146), 107 states have call predecessors, (146), 126 states have return successors, (179), 149 states have call predecessors, (179), 142 states have call successors, (179) [2021-12-28 02:33:08,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1550 states to 1550 states and 2089 transitions. [2021-12-28 02:33:08,689 INFO L78 Accepts]: Start accepts. Automaton has 1550 states and 2089 transitions. Word has length 65 [2021-12-28 02:33:08,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:08,690 INFO L470 AbstractCegarLoop]: Abstraction has 1550 states and 2089 transitions. [2021-12-28 02:33:08,691 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 02:33:08,691 INFO L276 IsEmpty]: Start isEmpty. Operand 1550 states and 2089 transitions. [2021-12-28 02:33:08,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 02:33:08,691 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:08,692 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 02:33:08,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 02:33:08,692 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:08,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:08,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1369150400, now seen corresponding path program 1 times [2021-12-28 02:33:08,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:08,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244023970] [2021-12-28 02:33:08,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:08,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:08,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:08,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:08,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:08,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:08,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:08,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:08,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:08,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:08,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:08,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:08,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:08,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:08,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:08,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:08,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:08,794 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 02:33:08,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:08,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244023970] [2021-12-28 02:33:08,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244023970] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:08,795 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:08,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:33:08,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728493268] [2021-12-28 02:33:08,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:08,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:33:08,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:08,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:33:08,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:33:08,797 INFO L87 Difference]: Start difference. First operand 1550 states and 2089 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 02:33:09,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:09,215 INFO L93 Difference]: Finished difference Result 3889 states and 5050 transitions. [2021-12-28 02:33:09,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-28 02:33:09,216 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 02:33:09,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:09,226 INFO L225 Difference]: With dead ends: 3889 [2021-12-28 02:33:09,227 INFO L226 Difference]: Without dead ends: 2733 [2021-12-28 02:33:09,230 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 02:33:09,233 INFO L933 BasicCegarLoop]: 704 mSDtfsCounter, 1414 mSDsluCounter, 1395 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1447 SdHoareTripleChecker+Valid, 2099 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:09,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1447 Valid, 2099 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 02:33:09,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2733 states. [2021-12-28 02:33:09,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2733 to 2613. [2021-12-28 02:33:09,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2613 states, 2096 states have (on average 1.3148854961832062) internal successors, (2756), 2132 states have internal predecessors, (2756), 265 states have call successors, (265), 206 states have call predecessors, (265), 250 states have return successors, (370), 277 states have call predecessors, (370), 261 states have call successors, (370) [2021-12-28 02:33:09,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2613 states to 2613 states and 3391 transitions. [2021-12-28 02:33:09,341 INFO L78 Accepts]: Start accepts. Automaton has 2613 states and 3391 transitions. Word has length 65 [2021-12-28 02:33:09,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:09,341 INFO L470 AbstractCegarLoop]: Abstraction has 2613 states and 3391 transitions. [2021-12-28 02:33:09,341 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 02:33:09,342 INFO L276 IsEmpty]: Start isEmpty. Operand 2613 states and 3391 transitions. [2021-12-28 02:33:09,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-28 02:33:09,344 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:09,344 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 02:33:09,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-28 02:33:09,344 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:09,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:09,345 INFO L85 PathProgramCache]: Analyzing trace with hash 176493782, now seen corresponding path program 1 times [2021-12-28 02:33:09,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:09,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504564160] [2021-12-28 02:33:09,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:09,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:09,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:09,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:09,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:09,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:09,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:09,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:09,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:09,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:09,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:09,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:09,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:09,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:09,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:09,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:09,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:09,411 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 02:33:09,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:09,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504564160] [2021-12-28 02:33:09,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504564160] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:09,411 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:09,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 02:33:09,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811950848] [2021-12-28 02:33:09,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:09,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:33:09,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:09,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:33:09,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:33:09,412 INFO L87 Difference]: Start difference. First operand 2613 states and 3391 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 02:33:10,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:10,040 INFO L93 Difference]: Finished difference Result 5929 states and 7536 transitions. [2021-12-28 02:33:10,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 02:33:10,040 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 02:33:10,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:10,054 INFO L225 Difference]: With dead ends: 5929 [2021-12-28 02:33:10,054 INFO L226 Difference]: Without dead ends: 3715 [2021-12-28 02:33:10,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:33:10,059 INFO L933 BasicCegarLoop]: 733 mSDtfsCounter, 1187 mSDsluCounter, 1018 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1196 SdHoareTripleChecker+Valid, 1751 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:10,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1196 Valid, 1751 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-28 02:33:10,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3715 states. [2021-12-28 02:33:10,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3715 to 3447. [2021-12-28 02:33:10,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3447 states, 2744 states have (on average 1.2940962099125364) internal successors, (3551), 2785 states have internal predecessors, (3551), 357 states have call successors, (357), 286 states have call predecessors, (357), 344 states have return successors, (484), 378 states have call predecessors, (484), 353 states have call successors, (484) [2021-12-28 02:33:10,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3447 states to 3447 states and 4392 transitions. [2021-12-28 02:33:10,166 INFO L78 Accepts]: Start accepts. Automaton has 3447 states and 4392 transitions. Word has length 66 [2021-12-28 02:33:10,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:10,166 INFO L470 AbstractCegarLoop]: Abstraction has 3447 states and 4392 transitions. [2021-12-28 02:33:10,166 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 02:33:10,167 INFO L276 IsEmpty]: Start isEmpty. Operand 3447 states and 4392 transitions. [2021-12-28 02:33:10,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-28 02:33:10,174 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:10,174 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 02:33:10,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-28 02:33:10,175 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:10,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:10,175 INFO L85 PathProgramCache]: Analyzing trace with hash 138145877, now seen corresponding path program 1 times [2021-12-28 02:33:10,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:10,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378567503] [2021-12-28 02:33:10,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:10,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:10,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:10,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:10,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:10,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:10,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:10,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:10,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:10,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:10,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:10,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:10,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:10,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:10,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:10,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:10,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:10,265 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 02:33:10,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:10,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378567503] [2021-12-28 02:33:10,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378567503] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:10,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:10,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 02:33:10,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483083219] [2021-12-28 02:33:10,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:10,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:33:10,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:10,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:33:10,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:33:10,267 INFO L87 Difference]: Start difference. First operand 3447 states and 4392 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 02:33:10,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:10,670 INFO L93 Difference]: Finished difference Result 7319 states and 9166 transitions. [2021-12-28 02:33:10,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 02:33:10,671 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 02:33:10,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:10,703 INFO L225 Difference]: With dead ends: 7319 [2021-12-28 02:33:10,703 INFO L226 Difference]: Without dead ends: 4269 [2021-12-28 02:33:10,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:33:10,711 INFO L933 BasicCegarLoop]: 750 mSDtfsCounter, 1737 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1771 SdHoareTripleChecker+Valid, 1484 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:10,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1771 Valid, 1484 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 02:33:10,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4269 states. [2021-12-28 02:33:10,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4269 to 4001. [2021-12-28 02:33:10,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4001 states, 3184 states have (on average 1.2848618090452262) internal successors, (4091), 3229 states have internal predecessors, (4091), 413 states have call successors, (413), 336 states have call predecessors, (413), 402 states have return successors, (557), 438 states have call predecessors, (557), 409 states have call successors, (557) [2021-12-28 02:33:10,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4001 states to 4001 states and 5061 transitions. [2021-12-28 02:33:10,871 INFO L78 Accepts]: Start accepts. Automaton has 4001 states and 5061 transitions. Word has length 72 [2021-12-28 02:33:10,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:10,872 INFO L470 AbstractCegarLoop]: Abstraction has 4001 states and 5061 transitions. [2021-12-28 02:33:10,872 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 02:33:10,872 INFO L276 IsEmpty]: Start isEmpty. Operand 4001 states and 5061 transitions. [2021-12-28 02:33:10,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-28 02:33:10,874 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:10,874 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 02:33:10,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-28 02:33:10,874 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:10,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:10,875 INFO L85 PathProgramCache]: Analyzing trace with hash -529402658, now seen corresponding path program 1 times [2021-12-28 02:33:10,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:10,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680925176] [2021-12-28 02:33:10,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:10,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:10,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:10,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:10,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:10,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:10,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:10,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:10,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:10,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:10,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:10,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:10,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:10,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:10,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:10,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:10,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:10,953 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 02:33:10,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:10,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680925176] [2021-12-28 02:33:10,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680925176] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:10,954 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:10,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:33:10,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728902519] [2021-12-28 02:33:10,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:10,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:33:10,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:10,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:33:10,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:33:10,955 INFO L87 Difference]: Start difference. First operand 4001 states and 5061 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 02:33:11,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:11,399 INFO L93 Difference]: Finished difference Result 5087 states and 6356 transitions. [2021-12-28 02:33:11,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-28 02:33:11,399 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 02:33:11,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:11,418 INFO L225 Difference]: With dead ends: 5087 [2021-12-28 02:33:11,418 INFO L226 Difference]: Without dead ends: 5084 [2021-12-28 02:33:11,421 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 02:33:11,423 INFO L933 BasicCegarLoop]: 745 mSDtfsCounter, 2436 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 346 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2446 SdHoareTripleChecker+Valid, 1462 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:11,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2446 Valid, 1462 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [346 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 02:33:11,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5084 states. [2021-12-28 02:33:11,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5084 to 4463. [2021-12-28 02:33:11,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4463 states, 3539 states have (on average 1.2735235942356598) internal successors, (4507), 3587 states have internal predecessors, (4507), 463 states have call successors, (463), 380 states have call predecessors, (463), 459 states have return successors, (634), 498 states have call predecessors, (634), 460 states have call successors, (634) [2021-12-28 02:33:11,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4463 states to 4463 states and 5604 transitions. [2021-12-28 02:33:11,612 INFO L78 Accepts]: Start accepts. Automaton has 4463 states and 5604 transitions. Word has length 73 [2021-12-28 02:33:11,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:11,612 INFO L470 AbstractCegarLoop]: Abstraction has 4463 states and 5604 transitions. [2021-12-28 02:33:11,613 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 02:33:11,613 INFO L276 IsEmpty]: Start isEmpty. Operand 4463 states and 5604 transitions. [2021-12-28 02:33:11,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-28 02:33:11,614 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:11,614 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 02:33:11,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-28 02:33:11,615 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:11,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:11,615 INFO L85 PathProgramCache]: Analyzing trace with hash 766925247, now seen corresponding path program 1 times [2021-12-28 02:33:11,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:11,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683279693] [2021-12-28 02:33:11,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:11,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:11,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:11,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:11,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:11,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:11,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:11,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:11,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:11,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:11,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:11,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:11,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:11,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:11,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:11,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:11,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:11,722 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 02:33:11,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:11,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683279693] [2021-12-28 02:33:11,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683279693] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:33:11,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298710144] [2021-12-28 02:33:11,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:11,723 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:33:11,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:33:11,725 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 02:33:11,772 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 02:33:11,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:11,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-28 02:33:11,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:33:12,162 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 02:33:12,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 02:33:12,339 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 02:33:12,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298710144] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 02:33:12,339 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 02:33:12,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 10 [2021-12-28 02:33:12,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249221221] [2021-12-28 02:33:12,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 02:33:12,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-28 02:33:12,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:12,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-28 02:33:12,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-28 02:33:12,341 INFO L87 Difference]: Start difference. First operand 4463 states and 5604 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 02:33:13,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:13,900 INFO L93 Difference]: Finished difference Result 8781 states and 10813 transitions. [2021-12-28 02:33:13,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-28 02:33:13,901 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 02:33:13,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:13,942 INFO L225 Difference]: With dead ends: 8781 [2021-12-28 02:33:13,942 INFO L226 Difference]: Without dead ends: 8778 [2021-12-28 02:33:13,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 173 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=593, Unknown=0, NotChecked=0, Total=756 [2021-12-28 02:33:13,947 INFO L933 BasicCegarLoop]: 897 mSDtfsCounter, 1894 mSDsluCounter, 2415 mSDsCounter, 0 mSdLazyCounter, 2211 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1958 SdHoareTripleChecker+Valid, 3312 SdHoareTripleChecker+Invalid, 2428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 2211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:13,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1958 Valid, 3312 Invalid, 2428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 2211 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-28 02:33:13,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8778 states. [2021-12-28 02:33:14,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8778 to 7880. [2021-12-28 02:33:14,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7880 states, 6214 states have (on average 1.2536208561313165) internal successors, (7790), 6297 states have internal predecessors, (7790), 822 states have call successors, (822), 694 states have call predecessors, (822), 842 states have return successors, (1135), 891 states have call predecessors, (1135), 819 states have call successors, (1135) [2021-12-28 02:33:14,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7880 states to 7880 states and 9747 transitions. [2021-12-28 02:33:14,284 INFO L78 Accepts]: Start accepts. Automaton has 7880 states and 9747 transitions. Word has length 74 [2021-12-28 02:33:14,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:14,284 INFO L470 AbstractCegarLoop]: Abstraction has 7880 states and 9747 transitions. [2021-12-28 02:33:14,284 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 02:33:14,284 INFO L276 IsEmpty]: Start isEmpty. Operand 7880 states and 9747 transitions. [2021-12-28 02:33:14,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-28 02:33:14,286 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:14,286 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 02:33:14,326 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 02:33:14,499 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 02:33:14,503 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:14,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:14,503 INFO L85 PathProgramCache]: Analyzing trace with hash 889380766, now seen corresponding path program 2 times [2021-12-28 02:33:14,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:14,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400575379] [2021-12-28 02:33:14,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:14,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:14,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:14,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:14,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:14,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:14,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:14,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:14,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:14,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:14,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:14,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:14,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:14,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:14,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:14,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:14,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:14,555 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 02:33:14,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:14,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400575379] [2021-12-28 02:33:14,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400575379] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:14,556 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:14,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 02:33:14,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824517979] [2021-12-28 02:33:14,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:14,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:33:14,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:14,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:33:14,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:33:14,557 INFO L87 Difference]: Start difference. First operand 7880 states and 9747 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 02:33:14,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:14,983 INFO L93 Difference]: Finished difference Result 10474 states and 12956 transitions. [2021-12-28 02:33:14,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 02:33:14,984 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 02:33:14,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:15,003 INFO L225 Difference]: With dead ends: 10474 [2021-12-28 02:33:15,004 INFO L226 Difference]: Without dead ends: 4300 [2021-12-28 02:33:15,013 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 02:33:15,014 INFO L933 BasicCegarLoop]: 776 mSDtfsCounter, 1640 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1676 SdHoareTripleChecker+Valid, 1531 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:15,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1676 Valid, 1531 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 02:33:15,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4300 states. [2021-12-28 02:33:15,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4300 to 3292. [2021-12-28 02:33:15,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3292 states, 2632 states have (on average 1.2693768996960486) internal successors, (3341), 2661 states have internal predecessors, (3341), 341 states have call successors, (341), 276 states have call predecessors, (341), 317 states have return successors, (434), 357 states have call predecessors, (434), 338 states have call successors, (434) [2021-12-28 02:33:15,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3292 states to 3292 states and 4116 transitions. [2021-12-28 02:33:15,205 INFO L78 Accepts]: Start accepts. Automaton has 3292 states and 4116 transitions. Word has length 77 [2021-12-28 02:33:15,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:15,205 INFO L470 AbstractCegarLoop]: Abstraction has 3292 states and 4116 transitions. [2021-12-28 02:33:15,205 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 02:33:15,206 INFO L276 IsEmpty]: Start isEmpty. Operand 3292 states and 4116 transitions. [2021-12-28 02:33:15,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-28 02:33:15,208 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:15,208 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 02:33:15,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-28 02:33:15,208 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:15,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:15,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1748274255, now seen corresponding path program 1 times [2021-12-28 02:33:15,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:15,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993145911] [2021-12-28 02:33:15,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:15,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:15,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:15,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:15,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:15,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:15,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:15,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:15,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:15,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:15,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:15,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:15,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:15,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:15,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:15,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:15,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:15,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-28 02:33:15,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:15,284 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 02:33:15,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:15,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993145911] [2021-12-28 02:33:15,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993145911] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:15,285 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:15,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 02:33:15,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353554317] [2021-12-28 02:33:15,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:15,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 02:33:15,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:15,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 02:33:15,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:33:15,286 INFO L87 Difference]: Start difference. First operand 3292 states and 4116 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 02:33:16,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:16,304 INFO L93 Difference]: Finished difference Result 9076 states and 11113 transitions. [2021-12-28 02:33:16,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-28 02:33:16,305 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 02:33:16,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:16,317 INFO L225 Difference]: With dead ends: 9076 [2021-12-28 02:33:16,317 INFO L226 Difference]: Without dead ends: 5378 [2021-12-28 02:33:16,323 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 02:33:16,324 INFO L933 BasicCegarLoop]: 775 mSDtfsCounter, 1885 mSDsluCounter, 1453 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1897 SdHoareTripleChecker+Valid, 2228 SdHoareTripleChecker+Invalid, 1411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:16,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1897 Valid, 2228 Invalid, 1411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [363 Valid, 1048 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-28 02:33:16,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5378 states. [2021-12-28 02:33:16,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5378 to 5118. [2021-12-28 02:33:16,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5118 states, 4023 states have (on average 1.230673626646781) internal successors, (4951), 4089 states have internal predecessors, (4951), 541 states have call successors, (541), 448 states have call predecessors, (541), 552 states have return successors, (784), 583 states have call predecessors, (784), 538 states have call successors, (784) [2021-12-28 02:33:16,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5118 states to 5118 states and 6276 transitions. [2021-12-28 02:33:16,506 INFO L78 Accepts]: Start accepts. Automaton has 5118 states and 6276 transitions. Word has length 84 [2021-12-28 02:33:16,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:16,506 INFO L470 AbstractCegarLoop]: Abstraction has 5118 states and 6276 transitions. [2021-12-28 02:33:16,506 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 02:33:16,506 INFO L276 IsEmpty]: Start isEmpty. Operand 5118 states and 6276 transitions. [2021-12-28 02:33:16,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-28 02:33:16,508 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:16,508 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 02:33:16,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-28 02:33:16,509 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:16,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:16,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1535694468, now seen corresponding path program 1 times [2021-12-28 02:33:16,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:16,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321165013] [2021-12-28 02:33:16,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:16,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:16,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:16,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:16,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:16,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:16,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:16,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:16,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:16,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:16,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:16,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:16,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:16,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:16,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:16,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:16,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:16,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2021-12-28 02:33:16,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:16,581 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 02:33:16,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:16,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321165013] [2021-12-28 02:33:16,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321165013] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:16,581 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:16,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 02:33:16,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872117929] [2021-12-28 02:33:16,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:16,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 02:33:16,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:16,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 02:33:16,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-12-28 02:33:16,583 INFO L87 Difference]: Start difference. First operand 5118 states and 6276 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 02:33:17,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:17,794 INFO L93 Difference]: Finished difference Result 8478 states and 10294 transitions. [2021-12-28 02:33:17,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-28 02:33:17,794 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 02:33:17,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:17,804 INFO L225 Difference]: With dead ends: 8478 [2021-12-28 02:33:17,805 INFO L226 Difference]: Without dead ends: 4279 [2021-12-28 02:33:17,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=540, Unknown=0, NotChecked=0, Total=702 [2021-12-28 02:33:17,813 INFO L933 BasicCegarLoop]: 758 mSDtfsCounter, 2382 mSDsluCounter, 1838 mSDsCounter, 0 mSdLazyCounter, 1368 mSolverCounterSat, 397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2421 SdHoareTripleChecker+Valid, 2596 SdHoareTripleChecker+Invalid, 1765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 397 IncrementalHoareTripleChecker+Valid, 1368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:17,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2421 Valid, 2596 Invalid, 1765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 1368 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-28 02:33:17,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4279 states. [2021-12-28 02:33:18,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4279 to 3858. [2021-12-28 02:33:18,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3858 states, 3029 states have (on average 1.2231759656652361) internal successors, (3705), 3083 states have internal predecessors, (3705), 406 states have call successors, (406), 330 states have call predecessors, (406), 421 states have return successors, (553), 447 states have call predecessors, (553), 403 states have call successors, (553) [2021-12-28 02:33:18,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3858 states to 3858 states and 4664 transitions. [2021-12-28 02:33:18,019 INFO L78 Accepts]: Start accepts. Automaton has 3858 states and 4664 transitions. Word has length 93 [2021-12-28 02:33:18,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:18,019 INFO L470 AbstractCegarLoop]: Abstraction has 3858 states and 4664 transitions. [2021-12-28 02:33:18,020 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 02:33:18,020 INFO L276 IsEmpty]: Start isEmpty. Operand 3858 states and 4664 transitions. [2021-12-28 02:33:18,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-12-28 02:33:18,023 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:18,024 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 02:33:18,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-28 02:33:18,024 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:18,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:18,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1225012879, now seen corresponding path program 1 times [2021-12-28 02:33:18,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:18,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387669339] [2021-12-28 02:33:18,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:18,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:18,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:18,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:18,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:18,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:18,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:18,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:18,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:18,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-28 02:33:18,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2021-12-28 02:33:18,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-12-28 02:33:18,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-28 02:33:18,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:18,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:18,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-12-28 02:33:18,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-28 02:33:18,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2021-12-28 02:33:18,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,134 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 02:33:18,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:18,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387669339] [2021-12-28 02:33:18,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387669339] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:33:18,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807554165] [2021-12-28 02:33:18,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:18,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:33:18,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:33:18,152 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 02:33:18,189 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 02:33:18,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-28 02:33:18,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:33:18,489 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 02:33:18,490 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:33:18,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807554165] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:18,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 02:33:18,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 12 [2021-12-28 02:33:18,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467232691] [2021-12-28 02:33:18,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:18,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:33:18,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:18,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:33:18,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-12-28 02:33:18,493 INFO L87 Difference]: Start difference. First operand 3858 states and 4664 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 02:33:18,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:18,594 INFO L93 Difference]: Finished difference Result 5733 states and 6903 transitions. [2021-12-28 02:33:18,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:33:18,595 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 02:33:18,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:18,601 INFO L225 Difference]: With dead ends: 5733 [2021-12-28 02:33:18,601 INFO L226 Difference]: Without dead ends: 2274 [2021-12-28 02:33:18,607 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 02:33:18,608 INFO L933 BasicCegarLoop]: 736 mSDtfsCounter, 34 mSDsluCounter, 2907 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 3643 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 02:33:18,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 3643 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:33:18,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2274 states. [2021-12-28 02:33:18,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2274 to 2152. [2021-12-28 02:33:18,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2152 states, 1769 states have (on average 1.2521198417184851) internal successors, (2215), 1786 states have internal predecessors, (2215), 195 states have call successors, (195), 144 states have call predecessors, (195), 186 states have return successors, (260), 222 states have call predecessors, (260), 192 states have call successors, (260) [2021-12-28 02:33:18,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 2670 transitions. [2021-12-28 02:33:18,692 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 2670 transitions. Word has length 145 [2021-12-28 02:33:18,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:18,692 INFO L470 AbstractCegarLoop]: Abstraction has 2152 states and 2670 transitions. [2021-12-28 02:33:18,692 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 02:33:18,692 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 2670 transitions. [2021-12-28 02:33:18,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-28 02:33:18,695 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:18,695 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 02:33:18,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-28 02:33:18,914 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 02:33:18,915 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:18,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:18,915 INFO L85 PathProgramCache]: Analyzing trace with hash -732374681, now seen corresponding path program 1 times [2021-12-28 02:33:18,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:18,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031539823] [2021-12-28 02:33:18,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:18,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:18,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:18,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:18,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:18,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:18,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:18,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:18,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:18,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2021-12-28 02:33:18,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2021-12-28 02:33:18,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-28 02:33:18,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-12-28 02:33:18,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:18,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:18,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-12-28 02:33:18,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2021-12-28 02:33:18,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:18,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2021-12-28 02:33:18,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:19,001 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 02:33:19,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:19,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031539823] [2021-12-28 02:33:19,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031539823] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:19,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:19,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 02:33:19,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889032319] [2021-12-28 02:33:19,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:19,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:33:19,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:19,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:33:19,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:33:19,003 INFO L87 Difference]: Start difference. First operand 2152 states and 2670 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 02:33:19,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:19,596 INFO L93 Difference]: Finished difference Result 2200 states and 2720 transitions. [2021-12-28 02:33:19,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:33:19,597 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 02:33:19,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:19,601 INFO L225 Difference]: With dead ends: 2200 [2021-12-28 02:33:19,602 INFO L226 Difference]: Without dead ends: 1826 [2021-12-28 02:33:19,603 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 02:33:19,604 INFO L933 BasicCegarLoop]: 716 mSDtfsCounter, 1068 mSDsluCounter, 969 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1080 SdHoareTripleChecker+Valid, 1685 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:19,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1080 Valid, 1685 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-28 02:33:19,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1826 states. [2021-12-28 02:33:19,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1826 to 1781. [2021-12-28 02:33:19,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1781 states, 1482 states have (on average 1.2746288798920378) internal successors, (1889), 1496 states have internal predecessors, (1889), 154 states have call successors, (154), 109 states have call predecessors, (154), 143 states have return successors, (205), 176 states have call predecessors, (205), 151 states have call successors, (205) [2021-12-28 02:33:19,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1781 states to 1781 states and 2248 transitions. [2021-12-28 02:33:19,695 INFO L78 Accepts]: Start accepts. Automaton has 1781 states and 2248 transitions. Word has length 147 [2021-12-28 02:33:19,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:19,695 INFO L470 AbstractCegarLoop]: Abstraction has 1781 states and 2248 transitions. [2021-12-28 02:33:19,695 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 02:33:19,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1781 states and 2248 transitions. [2021-12-28 02:33:19,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2021-12-28 02:33:19,698 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:19,698 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 02:33:19,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-28 02:33:19,698 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:19,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:19,699 INFO L85 PathProgramCache]: Analyzing trace with hash -256970733, now seen corresponding path program 1 times [2021-12-28 02:33:19,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:19,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300980834] [2021-12-28 02:33:19,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:19,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:19,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:19,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:19,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:19,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:19,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:19,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:19,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:19,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:19,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:19,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:19,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:19,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:19,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:19,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:19,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:19,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-28 02:33:19,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:19,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-28 02:33:19,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:19,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2021-12-28 02:33:19,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:19,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-12-28 02:33:19,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:19,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:19,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:19,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:19,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:19,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2021-12-28 02:33:19,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:19,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2021-12-28 02:33:19,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:19,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2021-12-28 02:33:19,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:19,819 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 02:33:19,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:19,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300980834] [2021-12-28 02:33:19,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300980834] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:19,820 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:19,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:33:19,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230111431] [2021-12-28 02:33:19,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:19,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:33:19,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:19,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:33:19,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:33:19,822 INFO L87 Difference]: Start difference. First operand 1781 states and 2248 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 02:33:20,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:20,721 INFO L93 Difference]: Finished difference Result 3047 states and 3747 transitions. [2021-12-28 02:33:20,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 02:33:20,722 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 02:33:20,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:20,730 INFO L225 Difference]: With dead ends: 3047 [2021-12-28 02:33:20,730 INFO L226 Difference]: Without dead ends: 1754 [2021-12-28 02:33:20,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:33:20,747 INFO L933 BasicCegarLoop]: 748 mSDtfsCounter, 681 mSDsluCounter, 1777 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 2525 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:20,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [682 Valid, 2525 Invalid, 1078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 983 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-28 02:33:20,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1754 states. [2021-12-28 02:33:20,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1754 to 1670. [2021-12-28 02:33:20,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1670 states, 1395 states have (on average 1.2845878136200717) internal successors, (1792), 1409 states have internal predecessors, (1792), 142 states have call successors, (142), 99 states have call predecessors, (142), 131 states have return successors, (187), 162 states have call predecessors, (187), 139 states have call successors, (187) [2021-12-28 02:33:20,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1670 states to 1670 states and 2121 transitions. [2021-12-28 02:33:20,942 INFO L78 Accepts]: Start accepts. Automaton has 1670 states and 2121 transitions. Word has length 159 [2021-12-28 02:33:20,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:20,943 INFO L470 AbstractCegarLoop]: Abstraction has 1670 states and 2121 transitions. [2021-12-28 02:33:20,943 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 02:33:20,943 INFO L276 IsEmpty]: Start isEmpty. Operand 1670 states and 2121 transitions. [2021-12-28 02:33:20,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-12-28 02:33:20,959 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:20,959 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 02:33:20,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-28 02:33:20,960 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:20,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:20,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1070811765, now seen corresponding path program 1 times [2021-12-28 02:33:20,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:20,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702148481] [2021-12-28 02:33:20,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:20,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:20,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:21,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:21,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:21,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-28 02:33:21,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:21,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:33:21,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:21,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:21,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:21,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:21,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:21,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-28 02:33:21,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:21,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-28 02:33:21,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:21,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-12-28 02:33:21,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:21,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-28 02:33:21,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:21,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2021-12-28 02:33:21,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:21,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-12-28 02:33:21,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:21,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-12-28 02:33:21,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:21,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:33:21,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:21,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2021-12-28 02:33:21,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:21,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2021-12-28 02:33:21,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:21,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2021-12-28 02:33:21,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:21,159 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 02:33:21,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:21,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702148481] [2021-12-28 02:33:21,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702148481] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:33:21,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019430518] [2021-12-28 02:33:21,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:21,160 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:33:21,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:33:21,176 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 02:33:21,180 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 02:33:21,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:21,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-28 02:33:21,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:33:21,598 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 02:33:21,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 02:33:22,043 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 02:33:22,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019430518] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 02:33:22,043 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 02:33:22,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2021-12-28 02:33:22,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805451631] [2021-12-28 02:33:22,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 02:33:22,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-28 02:33:22,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:22,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-28 02:33:22,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-12-28 02:33:22,045 INFO L87 Difference]: Start difference. First operand 1670 states and 2121 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 02:33:23,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:23,200 INFO L93 Difference]: Finished difference Result 3406 states and 4260 transitions. [2021-12-28 02:33:23,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-28 02:33:23,200 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 02:33:23,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:23,204 INFO L225 Difference]: With dead ends: 3406 [2021-12-28 02:33:23,204 INFO L226 Difference]: Without dead ends: 2061 [2021-12-28 02:33:23,207 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 02:33:23,207 INFO L933 BasicCegarLoop]: 683 mSDtfsCounter, 2218 mSDsluCounter, 1737 mSDsCounter, 0 mSdLazyCounter, 1611 mSolverCounterSat, 367 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2250 SdHoareTripleChecker+Valid, 2420 SdHoareTripleChecker+Invalid, 1978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 367 IncrementalHoareTripleChecker+Valid, 1611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:23,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2250 Valid, 2420 Invalid, 1978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [367 Valid, 1611 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-28 02:33:23,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2061 states. [2021-12-28 02:33:23,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2061 to 1948. [2021-12-28 02:33:23,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1948 states, 1598 states have (on average 1.2484355444305382) internal successors, (1995), 1613 states have internal predecessors, (1995), 182 states have call successors, (182), 137 states have call predecessors, (182), 166 states have return successors, (256), 198 states have call predecessors, (256), 179 states have call successors, (256) [2021-12-28 02:33:23,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 2433 transitions. [2021-12-28 02:33:23,282 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 2433 transitions. Word has length 162 [2021-12-28 02:33:23,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:23,283 INFO L470 AbstractCegarLoop]: Abstraction has 1948 states and 2433 transitions. [2021-12-28 02:33:23,283 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 02:33:23,283 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 2433 transitions. [2021-12-28 02:33:23,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-28 02:33:23,285 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:23,285 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:23,305 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 02:33:23,507 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 02:33:23,508 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:23,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:23,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1451778894, now seen corresponding path program 1 times [2021-12-28 02:33:23,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:23,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296641388] [2021-12-28 02:33:23,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:23,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:23,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:23,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:23,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:23,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-28 02:33:23,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:23,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 02:33:23,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:23,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-28 02:33:23,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:23,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-28 02:33:23,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:23,630 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 02:33:23,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:23,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296641388] [2021-12-28 02:33:23,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296641388] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:23,630 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:23,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 02:33:23,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479072199] [2021-12-28 02:33:23,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:23,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 02:33:23,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:23,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 02:33:23,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 02:33:23,632 INFO L87 Difference]: Start difference. First operand 1948 states and 2433 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:33:25,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:25,036 INFO L93 Difference]: Finished difference Result 2465 states and 3271 transitions. [2021-12-28 02:33:25,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:33:25,037 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-28 02:33:25,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:25,041 INFO L225 Difference]: With dead ends: 2465 [2021-12-28 02:33:25,042 INFO L226 Difference]: Without dead ends: 2090 [2021-12-28 02:33:25,043 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 02:33:25,043 INFO L933 BasicCegarLoop]: 794 mSDtfsCounter, 1143 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1167 SdHoareTripleChecker+Valid, 1368 SdHoareTripleChecker+Invalid, 904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:25,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1167 Valid, 1368 Invalid, 904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 810 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-28 02:33:25,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2021-12-28 02:33:25,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 1948. [2021-12-28 02:33:25,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1948 states, 1598 states have (on average 1.2478097622027535) internal successors, (1994), 1613 states have internal predecessors, (1994), 182 states have call successors, (182), 137 states have call predecessors, (182), 166 states have return successors, (256), 198 states have call predecessors, (256), 179 states have call successors, (256) [2021-12-28 02:33:25,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 2432 transitions. [2021-12-28 02:33:25,192 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 2432 transitions. Word has length 179 [2021-12-28 02:33:25,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:25,193 INFO L470 AbstractCegarLoop]: Abstraction has 1948 states and 2432 transitions. [2021-12-28 02:33:25,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:33:25,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 2432 transitions. [2021-12-28 02:33:25,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-28 02:33:25,195 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:25,195 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:25,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-28 02:33:25,195 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:25,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:25,195 INFO L85 PathProgramCache]: Analyzing trace with hash 2141610384, now seen corresponding path program 1 times [2021-12-28 02:33:25,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:25,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957371718] [2021-12-28 02:33:25,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:25,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:25,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:25,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:25,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:25,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-28 02:33:25,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:25,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 02:33:25,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:25,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-28 02:33:25,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:25,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-28 02:33:25,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:25,313 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 02:33:25,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:25,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957371718] [2021-12-28 02:33:25,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957371718] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:25,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:25,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 02:33:25,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207088641] [2021-12-28 02:33:25,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:25,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 02:33:25,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:25,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 02:33:25,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 02:33:25,316 INFO L87 Difference]: Start difference. First operand 1948 states and 2432 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:33:26,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:26,738 INFO L93 Difference]: Finished difference Result 2457 states and 3254 transitions. [2021-12-28 02:33:26,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:33:26,738 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-28 02:33:26,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:26,743 INFO L225 Difference]: With dead ends: 2457 [2021-12-28 02:33:26,744 INFO L226 Difference]: Without dead ends: 2090 [2021-12-28 02:33:26,745 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 02:33:26,745 INFO L933 BasicCegarLoop]: 793 mSDtfsCounter, 1134 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1158 SdHoareTripleChecker+Valid, 1366 SdHoareTripleChecker+Invalid, 903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:26,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1158 Valid, 1366 Invalid, 903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-28 02:33:26,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2021-12-28 02:33:26,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 1948. [2021-12-28 02:33:26,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1948 states, 1598 states have (on average 1.2471839799749687) internal successors, (1993), 1613 states have internal predecessors, (1993), 182 states have call successors, (182), 137 states have call predecessors, (182), 166 states have return successors, (256), 198 states have call predecessors, (256), 179 states have call successors, (256) [2021-12-28 02:33:26,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1948 states to 1948 states and 2431 transitions. [2021-12-28 02:33:26,857 INFO L78 Accepts]: Start accepts. Automaton has 1948 states and 2431 transitions. Word has length 179 [2021-12-28 02:33:26,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:26,857 INFO L470 AbstractCegarLoop]: Abstraction has 1948 states and 2431 transitions. [2021-12-28 02:33:26,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 3 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:33:26,857 INFO L276 IsEmpty]: Start isEmpty. Operand 1948 states and 2431 transitions. [2021-12-28 02:33:26,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-28 02:33:26,859 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:26,860 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:26,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-28 02:33:26,860 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:26,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:26,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1367359022, now seen corresponding path program 1 times [2021-12-28 02:33:26,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:26,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509682174] [2021-12-28 02:33:26,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:26,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:26,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:26,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:26,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:26,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-28 02:33:26,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:26,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 02:33:26,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:26,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-28 02:33:26,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:26,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-28 02:33:27,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:27,003 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 02:33:27,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:27,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509682174] [2021-12-28 02:33:27,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509682174] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:27,003 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:27,003 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 02:33:27,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551328835] [2021-12-28 02:33:27,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:27,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:33:27,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:27,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:33:27,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:33:27,005 INFO L87 Difference]: Start difference. First operand 1948 states and 2431 transitions. Second operand has 6 states, 6 states have (on average 28.0) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:33:29,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:29,479 INFO L93 Difference]: Finished difference Result 2978 states and 4102 transitions. [2021-12-28 02:33:29,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 02:33:29,480 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 28.0) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-28 02:33:29,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:29,486 INFO L225 Difference]: With dead ends: 2978 [2021-12-28 02:33:29,487 INFO L226 Difference]: Without dead ends: 2614 [2021-12-28 02:33:29,488 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 02:33:29,489 INFO L933 BasicCegarLoop]: 833 mSDtfsCounter, 1786 mSDsluCounter, 1136 mSDsCounter, 0 mSdLazyCounter, 2123 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1815 SdHoareTripleChecker+Valid, 1969 SdHoareTripleChecker+Invalid, 2284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 2123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:29,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1815 Valid, 1969 Invalid, 2284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 2123 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-28 02:33:29,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2614 states. [2021-12-28 02:33:29,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2614 to 2329. [2021-12-28 02:33:29,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2329 states, 1951 states have (on average 1.3116350589441312) internal successors, (2559), 1967 states have internal predecessors, (2559), 203 states have call successors, (203), 143 states have call predecessors, (203), 173 states have return successors, (280), 219 states have call predecessors, (280), 200 states have call successors, (280) [2021-12-28 02:33:29,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2329 states to 2329 states and 3042 transitions. [2021-12-28 02:33:29,659 INFO L78 Accepts]: Start accepts. Automaton has 2329 states and 3042 transitions. Word has length 179 [2021-12-28 02:33:29,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:29,660 INFO L470 AbstractCegarLoop]: Abstraction has 2329 states and 3042 transitions. [2021-12-28 02:33:29,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.0) internal successors, (168), 4 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:33:29,660 INFO L276 IsEmpty]: Start isEmpty. Operand 2329 states and 3042 transitions. [2021-12-28 02:33:29,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-28 02:33:29,662 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:29,662 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:29,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-28 02:33:29,663 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:29,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:29,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1541868494, now seen corresponding path program 1 times [2021-12-28 02:33:29,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:29,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105316841] [2021-12-28 02:33:29,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:29,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:29,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:29,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:29,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:29,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-28 02:33:29,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:29,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 02:33:29,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:29,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-28 02:33:29,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:29,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-28 02:33:29,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:29,801 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 02:33:29,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:29,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105316841] [2021-12-28 02:33:29,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105316841] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:29,802 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:29,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:33:29,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283605960] [2021-12-28 02:33:29,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:29,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:33:29,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:29,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:33:29,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:33:29,804 INFO L87 Difference]: Start difference. First operand 2329 states and 3042 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:33:33,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:33,207 INFO L93 Difference]: Finished difference Result 3903 states and 5602 transitions. [2021-12-28 02:33:33,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:33:33,208 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-28 02:33:33,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:33,245 INFO L225 Difference]: With dead ends: 3903 [2021-12-28 02:33:33,245 INFO L226 Difference]: Without dead ends: 3158 [2021-12-28 02:33:33,249 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 02:33:33,250 INFO L933 BasicCegarLoop]: 1142 mSDtfsCounter, 1817 mSDsluCounter, 2160 mSDsCounter, 0 mSdLazyCounter, 3326 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1846 SdHoareTripleChecker+Valid, 3302 SdHoareTripleChecker+Invalid, 3447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 3326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:33,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1846 Valid, 3302 Invalid, 3447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 3326 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-28 02:33:33,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3158 states. [2021-12-28 02:33:33,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3158 to 2684. [2021-12-28 02:33:33,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2684 states, 2278 states have (on average 1.3489903424056189) internal successors, (3073), 2295 states have internal predecessors, (3073), 224 states have call successors, (224), 149 states have call predecessors, (224), 180 states have return successors, (303), 241 states have call predecessors, (303), 221 states have call successors, (303) [2021-12-28 02:33:33,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2684 states to 2684 states and 3600 transitions. [2021-12-28 02:33:33,594 INFO L78 Accepts]: Start accepts. Automaton has 2684 states and 3600 transitions. Word has length 179 [2021-12-28 02:33:33,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:33,594 INFO L470 AbstractCegarLoop]: Abstraction has 2684 states and 3600 transitions. [2021-12-28 02:33:33,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:33:33,607 INFO L276 IsEmpty]: Start isEmpty. Operand 2684 states and 3600 transitions. [2021-12-28 02:33:33,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-28 02:33:33,611 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:33,611 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:33,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-28 02:33:33,611 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:33,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:33,612 INFO L85 PathProgramCache]: Analyzing trace with hash 930599436, now seen corresponding path program 1 times [2021-12-28 02:33:33,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:33,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925179274] [2021-12-28 02:33:33,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:33,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:33,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:33,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:33,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:33,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-28 02:33:33,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:33,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 02:33:33,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:33,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-28 02:33:33,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:33,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-28 02:33:33,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:33,748 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 02:33:33,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:33,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925179274] [2021-12-28 02:33:33,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925179274] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:33,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:33,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:33:33,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730745951] [2021-12-28 02:33:33,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:33,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:33:33,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:33,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:33:33,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:33:33,750 INFO L87 Difference]: Start difference. First operand 2684 states and 3600 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:33:35,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:35,329 INFO L93 Difference]: Finished difference Result 4274 states and 6198 transitions. [2021-12-28 02:33:35,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:33:35,329 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-28 02:33:35,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:35,335 INFO L225 Difference]: With dead ends: 4274 [2021-12-28 02:33:35,335 INFO L226 Difference]: Without dead ends: 3174 [2021-12-28 02:33:35,338 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 02:33:35,339 INFO L933 BasicCegarLoop]: 772 mSDtfsCounter, 1565 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 1440 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1595 SdHoareTripleChecker+Valid, 1690 SdHoareTripleChecker+Invalid, 1604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 1440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:35,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1595 Valid, 1690 Invalid, 1604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 1440 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-28 02:33:35,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3174 states. [2021-12-28 02:33:35,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3174 to 2684. [2021-12-28 02:33:35,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2684 states, 2278 states have (on average 1.3476733977172959) internal successors, (3070), 2295 states have internal predecessors, (3070), 224 states have call successors, (224), 149 states have call predecessors, (224), 180 states have return successors, (303), 241 states have call predecessors, (303), 221 states have call successors, (303) [2021-12-28 02:33:35,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2684 states to 2684 states and 3597 transitions. [2021-12-28 02:33:35,522 INFO L78 Accepts]: Start accepts. Automaton has 2684 states and 3597 transitions. Word has length 179 [2021-12-28 02:33:35,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:35,522 INFO L470 AbstractCegarLoop]: Abstraction has 2684 states and 3597 transitions. [2021-12-28 02:33:35,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:33:35,523 INFO L276 IsEmpty]: Start isEmpty. Operand 2684 states and 3597 transitions. [2021-12-28 02:33:35,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-28 02:33:35,525 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:35,525 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:35,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-28 02:33:35,526 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:35,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:35,526 INFO L85 PathProgramCache]: Analyzing trace with hash -474592242, now seen corresponding path program 1 times [2021-12-28 02:33:35,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:35,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247186093] [2021-12-28 02:33:35,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:35,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:35,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:35,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:35,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:35,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-28 02:33:35,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:35,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 02:33:35,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:35,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-28 02:33:35,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:35,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-28 02:33:35,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:35,650 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 02:33:35,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:35,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247186093] [2021-12-28 02:33:35,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247186093] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:35,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:35,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:33:35,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781966426] [2021-12-28 02:33:35,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:35,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:33:35,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:35,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:33:35,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:33:35,653 INFO L87 Difference]: Start difference. First operand 2684 states and 3597 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:33:37,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:37,246 INFO L93 Difference]: Finished difference Result 4270 states and 6181 transitions. [2021-12-28 02:33:37,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:33:37,246 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-28 02:33:37,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:37,252 INFO L225 Difference]: With dead ends: 4270 [2021-12-28 02:33:37,253 INFO L226 Difference]: Without dead ends: 3170 [2021-12-28 02:33:37,256 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 02:33:37,257 INFO L933 BasicCegarLoop]: 768 mSDtfsCounter, 1563 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 1430 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1593 SdHoareTripleChecker+Valid, 1686 SdHoareTripleChecker+Invalid, 1594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 1430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:37,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1593 Valid, 1686 Invalid, 1594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 1430 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-28 02:33:37,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3170 states. [2021-12-28 02:33:37,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3170 to 2684. [2021-12-28 02:33:37,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2684 states, 2278 states have (on average 1.3463564530289729) internal successors, (3067), 2295 states have internal predecessors, (3067), 224 states have call successors, (224), 149 states have call predecessors, (224), 180 states have return successors, (303), 241 states have call predecessors, (303), 221 states have call successors, (303) [2021-12-28 02:33:37,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2684 states to 2684 states and 3594 transitions. [2021-12-28 02:33:37,432 INFO L78 Accepts]: Start accepts. Automaton has 2684 states and 3594 transitions. Word has length 179 [2021-12-28 02:33:37,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:37,432 INFO L470 AbstractCegarLoop]: Abstraction has 2684 states and 3594 transitions. [2021-12-28 02:33:37,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:33:37,432 INFO L276 IsEmpty]: Start isEmpty. Operand 2684 states and 3594 transitions. [2021-12-28 02:33:37,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-28 02:33:37,436 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:37,436 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:37,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-28 02:33:37,436 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:37,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:37,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1419741644, now seen corresponding path program 1 times [2021-12-28 02:33:37,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:37,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563047473] [2021-12-28 02:33:37,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:37,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:37,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:37,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:37,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:37,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-28 02:33:37,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:37,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 02:33:37,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:37,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-28 02:33:37,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:37,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-28 02:33:37,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:37,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:37,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:37,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563047473] [2021-12-28 02:33:37,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563047473] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:37,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:37,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:33:37,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985882436] [2021-12-28 02:33:37,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:37,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:33:37,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:37,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:33:37,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:33:37,571 INFO L87 Difference]: Start difference. First operand 2684 states and 3594 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:33:40,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:40,913 INFO L93 Difference]: Finished difference Result 5257 states and 7744 transitions. [2021-12-28 02:33:40,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:33:40,914 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-28 02:33:40,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:40,927 INFO L225 Difference]: With dead ends: 5257 [2021-12-28 02:33:40,927 INFO L226 Difference]: Without dead ends: 4157 [2021-12-28 02:33:40,931 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 02:33:40,932 INFO L933 BasicCegarLoop]: 1123 mSDtfsCounter, 1799 mSDsluCounter, 2160 mSDsCounter, 0 mSdLazyCounter, 3268 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1828 SdHoareTripleChecker+Valid, 3283 SdHoareTripleChecker+Invalid, 3390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 3268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:40,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1828 Valid, 3283 Invalid, 3390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 3268 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-28 02:33:40,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4157 states. [2021-12-28 02:33:41,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4157 to 3403. [2021-12-28 02:33:41,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3403 states, 2941 states have (on average 1.3954437266235975) internal successors, (4104), 2960 states have internal predecessors, (4104), 266 states have call successors, (266), 161 states have call predecessors, (266), 194 states have return successors, (353), 285 states have call predecessors, (353), 263 states have call successors, (353) [2021-12-28 02:33:41,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3403 states to 3403 states and 4723 transitions. [2021-12-28 02:33:41,154 INFO L78 Accepts]: Start accepts. Automaton has 3403 states and 4723 transitions. Word has length 179 [2021-12-28 02:33:41,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:41,154 INFO L470 AbstractCegarLoop]: Abstraction has 3403 states and 4723 transitions. [2021-12-28 02:33:41,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:33:41,154 INFO L276 IsEmpty]: Start isEmpty. Operand 3403 states and 4723 transitions. [2021-12-28 02:33:41,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-28 02:33:41,157 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:41,157 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:41,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-28 02:33:41,157 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:41,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:41,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1428644786, now seen corresponding path program 1 times [2021-12-28 02:33:41,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:41,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236705199] [2021-12-28 02:33:41,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:41,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:41,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:41,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:41,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:41,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-28 02:33:41,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:41,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 02:33:41,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:41,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-28 02:33:41,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:41,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-28 02:33:41,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:41,279 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 02:33:41,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:41,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236705199] [2021-12-28 02:33:41,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236705199] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:41,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:41,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:33:41,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721405077] [2021-12-28 02:33:41,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:41,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:33:41,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:41,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:33:41,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:33:41,282 INFO L87 Difference]: Start difference. First operand 3403 states and 4723 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:33:43,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:43,214 INFO L93 Difference]: Finished difference Result 5962 states and 8860 transitions. [2021-12-28 02:33:43,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:33:43,215 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-28 02:33:43,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:43,227 INFO L225 Difference]: With dead ends: 5962 [2021-12-28 02:33:43,227 INFO L226 Difference]: Without dead ends: 4143 [2021-12-28 02:33:43,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:33:43,232 INFO L933 BasicCegarLoop]: 761 mSDtfsCounter, 1344 mSDsluCounter, 1172 mSDsCounter, 0 mSdLazyCounter, 1590 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1374 SdHoareTripleChecker+Valid, 1933 SdHoareTripleChecker+Invalid, 1711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:43,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1374 Valid, 1933 Invalid, 1711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1590 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-28 02:33:43,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4143 states. [2021-12-28 02:33:43,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4143 to 3403. [2021-12-28 02:33:43,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3403 states, 2941 states have (on average 1.393743624617477) internal successors, (4099), 2960 states have internal predecessors, (4099), 266 states have call successors, (266), 161 states have call predecessors, (266), 194 states have return successors, (353), 285 states have call predecessors, (353), 263 states have call successors, (353) [2021-12-28 02:33:43,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3403 states to 3403 states and 4718 transitions. [2021-12-28 02:33:43,459 INFO L78 Accepts]: Start accepts. Automaton has 3403 states and 4718 transitions. Word has length 179 [2021-12-28 02:33:43,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:43,459 INFO L470 AbstractCegarLoop]: Abstraction has 3403 states and 4718 transitions. [2021-12-28 02:33:43,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:33:43,459 INFO L276 IsEmpty]: Start isEmpty. Operand 3403 states and 4718 transitions. [2021-12-28 02:33:43,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-28 02:33:43,462 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:43,462 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:43,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-12-28 02:33:43,462 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:43,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:43,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1943155084, now seen corresponding path program 1 times [2021-12-28 02:33:43,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:43,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39566046] [2021-12-28 02:33:43,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:43,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:43,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:43,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:43,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:43,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-28 02:33:43,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:43,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 02:33:43,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:43,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-28 02:33:43,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:43,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-28 02:33:43,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:43,612 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 02:33:43,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:43,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39566046] [2021-12-28 02:33:43,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39566046] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:43,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:43,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:33:43,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422130656] [2021-12-28 02:33:43,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:43,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:33:43,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:43,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:33:43,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:33:43,614 INFO L87 Difference]: Start difference. First operand 3403 states and 4718 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:33:47,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:47,046 INFO L93 Difference]: Finished difference Result 7880 states and 11881 transitions. [2021-12-28 02:33:47,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:33:47,047 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-28 02:33:47,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:47,061 INFO L225 Difference]: With dead ends: 7880 [2021-12-28 02:33:47,061 INFO L226 Difference]: Without dead ends: 6061 [2021-12-28 02:33:47,065 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 02:33:47,066 INFO L933 BasicCegarLoop]: 853 mSDtfsCounter, 1890 mSDsluCounter, 1471 mSDsCounter, 0 mSdLazyCounter, 2903 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1919 SdHoareTripleChecker+Valid, 2324 SdHoareTripleChecker+Invalid, 3071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 2903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:47,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1919 Valid, 2324 Invalid, 3071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 2903 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-28 02:33:47,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6061 states. [2021-12-28 02:33:47,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6061 to 4845. [2021-12-28 02:33:47,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4845 states, 4271 states have (on average 1.444860688363381) internal successors, (6171), 4294 states have internal predecessors, (6171), 350 states have call successors, (350), 185 states have call predecessors, (350), 222 states have return successors, (459), 373 states have call predecessors, (459), 347 states have call successors, (459) [2021-12-28 02:33:47,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4845 states to 4845 states and 6980 transitions. [2021-12-28 02:33:47,459 INFO L78 Accepts]: Start accepts. Automaton has 4845 states and 6980 transitions. Word has length 179 [2021-12-28 02:33:47,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:47,460 INFO L470 AbstractCegarLoop]: Abstraction has 4845 states and 6980 transitions. [2021-12-28 02:33:47,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:33:47,460 INFO L276 IsEmpty]: Start isEmpty. Operand 4845 states and 6980 transitions. [2021-12-28 02:33:47,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-28 02:33:47,463 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:47,463 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:47,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-28 02:33:47,464 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:47,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:47,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1965949810, now seen corresponding path program 1 times [2021-12-28 02:33:47,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:47,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941573644] [2021-12-28 02:33:47,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:47,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:47,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:47,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:47,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:47,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-28 02:33:47,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:47,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 02:33:47,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:47,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-28 02:33:47,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:47,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-28 02:33:47,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:47,583 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 02:33:47,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:47,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941573644] [2021-12-28 02:33:47,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941573644] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:47,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:47,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:33:47,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414410072] [2021-12-28 02:33:47,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:47,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:33:47,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:47,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:33:47,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:33:47,585 INFO L87 Difference]: Start difference. First operand 4845 states and 6980 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:33:49,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:49,474 INFO L93 Difference]: Finished difference Result 9342 states and 14211 transitions. [2021-12-28 02:33:49,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:33:49,475 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-28 02:33:49,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:49,489 INFO L225 Difference]: With dead ends: 9342 [2021-12-28 02:33:49,489 INFO L226 Difference]: Without dead ends: 6081 [2021-12-28 02:33:49,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:33:49,498 INFO L933 BasicCegarLoop]: 752 mSDtfsCounter, 1345 mSDsluCounter, 1172 mSDsCounter, 0 mSdLazyCounter, 1568 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1375 SdHoareTripleChecker+Valid, 1924 SdHoareTripleChecker+Invalid, 1692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:49,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1375 Valid, 1924 Invalid, 1692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1568 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-28 02:33:49,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6081 states. [2021-12-28 02:33:49,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6081 to 4845. [2021-12-28 02:33:49,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4845 states, 4271 states have (on average 1.442753453523765) internal successors, (6162), 4294 states have internal predecessors, (6162), 350 states have call successors, (350), 185 states have call predecessors, (350), 222 states have return successors, (459), 373 states have call predecessors, (459), 347 states have call successors, (459) [2021-12-28 02:33:49,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4845 states to 4845 states and 6971 transitions. [2021-12-28 02:33:49,886 INFO L78 Accepts]: Start accepts. Automaton has 4845 states and 6971 transitions. Word has length 179 [2021-12-28 02:33:49,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:49,886 INFO L470 AbstractCegarLoop]: Abstraction has 4845 states and 6971 transitions. [2021-12-28 02:33:49,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:33:49,886 INFO L276 IsEmpty]: Start isEmpty. Operand 4845 states and 6971 transitions. [2021-12-28 02:33:49,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-28 02:33:49,889 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:49,889 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:49,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-28 02:33:49,889 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:49,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:49,890 INFO L85 PathProgramCache]: Analyzing trace with hash 2064369996, now seen corresponding path program 1 times [2021-12-28 02:33:49,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:49,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694401716] [2021-12-28 02:33:49,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:49,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:49,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:49,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:49,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:49,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-28 02:33:49,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:50,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 02:33:50,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:50,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-28 02:33:50,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:50,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-28 02:33:50,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:50,021 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 02:33:50,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:50,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694401716] [2021-12-28 02:33:50,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694401716] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:50,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:50,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:33:50,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688085905] [2021-12-28 02:33:50,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:50,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:33:50,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:50,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:33:50,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:33:50,023 INFO L87 Difference]: Start difference. First operand 4845 states and 6971 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:33:51,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:51,939 INFO L93 Difference]: Finished difference Result 9322 states and 14144 transitions. [2021-12-28 02:33:51,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:33:51,940 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-28 02:33:51,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:51,955 INFO L225 Difference]: With dead ends: 9322 [2021-12-28 02:33:51,956 INFO L226 Difference]: Without dead ends: 6061 [2021-12-28 02:33:51,964 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 02:33:51,965 INFO L933 BasicCegarLoop]: 746 mSDtfsCounter, 1560 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 1383 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1590 SdHoareTripleChecker+Valid, 1664 SdHoareTripleChecker+Invalid, 1550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 1383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:51,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1590 Valid, 1664 Invalid, 1550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 1383 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-28 02:33:51,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6061 states. [2021-12-28 02:33:52,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6061 to 4845. [2021-12-28 02:33:52,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4845 states, 4271 states have (on average 1.4406462186841489) internal successors, (6153), 4294 states have internal predecessors, (6153), 350 states have call successors, (350), 185 states have call predecessors, (350), 222 states have return successors, (459), 373 states have call predecessors, (459), 347 states have call successors, (459) [2021-12-28 02:33:52,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4845 states to 4845 states and 6962 transitions. [2021-12-28 02:33:52,424 INFO L78 Accepts]: Start accepts. Automaton has 4845 states and 6962 transitions. Word has length 179 [2021-12-28 02:33:52,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:52,425 INFO L470 AbstractCegarLoop]: Abstraction has 4845 states and 6962 transitions. [2021-12-28 02:33:52,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:33:52,425 INFO L276 IsEmpty]: Start isEmpty. Operand 4845 states and 6962 transitions. [2021-12-28 02:33:52,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-28 02:33:52,428 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:52,428 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:52,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-12-28 02:33:52,428 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:52,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:52,429 INFO L85 PathProgramCache]: Analyzing trace with hash 741191050, now seen corresponding path program 1 times [2021-12-28 02:33:52,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:52,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335265615] [2021-12-28 02:33:52,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:52,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:52,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:52,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:52,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:52,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-28 02:33:52,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:52,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 02:33:52,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:52,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-28 02:33:52,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:52,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-28 02:33:52,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:52,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:33:52,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:52,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335265615] [2021-12-28 02:33:52,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335265615] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:52,565 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:52,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:33:52,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383353800] [2021-12-28 02:33:52,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:52,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:33:52,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:52,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:33:52,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:33:52,567 INFO L87 Difference]: Start difference. First operand 4845 states and 6962 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:33:54,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:54,636 INFO L93 Difference]: Finished difference Result 9312 states and 14097 transitions. [2021-12-28 02:33:54,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:33:54,636 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-28 02:33:54,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:54,645 INFO L225 Difference]: With dead ends: 9312 [2021-12-28 02:33:54,646 INFO L226 Difference]: Without dead ends: 6051 [2021-12-28 02:33:54,650 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 02:33:54,650 INFO L933 BasicCegarLoop]: 742 mSDtfsCounter, 1340 mSDsluCounter, 1172 mSDsCounter, 0 mSdLazyCounter, 1538 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1370 SdHoareTripleChecker+Valid, 1914 SdHoareTripleChecker+Invalid, 1662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:54,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1370 Valid, 1914 Invalid, 1662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1538 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-28 02:33:54,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6051 states. [2021-12-28 02:33:55,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6051 to 4845. [2021-12-28 02:33:55,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4845 states, 4271 states have (on average 1.4385389838445328) internal successors, (6144), 4294 states have internal predecessors, (6144), 350 states have call successors, (350), 185 states have call predecessors, (350), 222 states have return successors, (459), 373 states have call predecessors, (459), 347 states have call successors, (459) [2021-12-28 02:33:55,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4845 states to 4845 states and 6953 transitions. [2021-12-28 02:33:55,019 INFO L78 Accepts]: Start accepts. Automaton has 4845 states and 6953 transitions. Word has length 179 [2021-12-28 02:33:55,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:55,019 INFO L470 AbstractCegarLoop]: Abstraction has 4845 states and 6953 transitions. [2021-12-28 02:33:55,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:33:55,020 INFO L276 IsEmpty]: Start isEmpty. Operand 4845 states and 6953 transitions. [2021-12-28 02:33:55,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-28 02:33:55,022 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:55,022 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:55,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-28 02:33:55,023 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:55,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:55,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1656796788, now seen corresponding path program 1 times [2021-12-28 02:33:55,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:55,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143003049] [2021-12-28 02:33:55,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:55,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:55,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:55,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:55,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:55,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-28 02:33:55,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:55,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-12-28 02:33:55,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:55,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2021-12-28 02:33:55,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:55,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2021-12-28 02:33:55,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:55,141 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 02:33:55,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:33:55,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143003049] [2021-12-28 02:33:55,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143003049] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:33:55,142 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:33:55,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:33:55,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137353243] [2021-12-28 02:33:55,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:33:55,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:33:55,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:33:55,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:33:55,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:33:55,143 INFO L87 Difference]: Start difference. First operand 4845 states and 6953 transitions. Second operand has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:33:58,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:33:58,925 INFO L93 Difference]: Finished difference Result 13096 states and 20005 transitions. [2021-12-28 02:33:58,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:33:58,926 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 179 [2021-12-28 02:33:58,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:33:58,948 INFO L225 Difference]: With dead ends: 13096 [2021-12-28 02:33:58,949 INFO L226 Difference]: Without dead ends: 9835 [2021-12-28 02:33:58,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-28 02:33:58,959 INFO L933 BasicCegarLoop]: 1083 mSDtfsCounter, 1768 mSDsluCounter, 2160 mSDsCounter, 0 mSdLazyCounter, 3163 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1797 SdHoareTripleChecker+Valid, 3243 SdHoareTripleChecker+Invalid, 3288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 3163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-28 02:33:58,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1797 Valid, 3243 Invalid, 3288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 3163 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-28 02:33:58,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9835 states. [2021-12-28 02:33:59,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9835 to 7770. [2021-12-28 02:33:59,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7770 states, 6972 states have (on average 1.4799196787148594) internal successors, (10318), 7003 states have internal predecessors, (10318), 518 states have call successors, (518), 233 states have call predecessors, (518), 278 states have return successors, (689), 549 states have call predecessors, (689), 515 states have call successors, (689) [2021-12-28 02:33:59,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7770 states to 7770 states and 11525 transitions. [2021-12-28 02:33:59,622 INFO L78 Accepts]: Start accepts. Automaton has 7770 states and 11525 transitions. Word has length 179 [2021-12-28 02:33:59,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:33:59,622 INFO L470 AbstractCegarLoop]: Abstraction has 7770 states and 11525 transitions. [2021-12-28 02:33:59,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.0) internal successors, (168), 5 states have internal predecessors, (168), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:33:59,623 INFO L276 IsEmpty]: Start isEmpty. Operand 7770 states and 11525 transitions. [2021-12-28 02:33:59,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-12-28 02:33:59,626 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:33:59,626 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 02:33:59,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-12-28 02:33:59,627 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting error2Err0ASSERT_VIOLATIONERROR_FUNCTION === [error1Err0ASSERT_VIOLATIONERROR_FUNCTION, error2Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:33:59,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:33:59,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1318509238, now seen corresponding path program 1 times [2021-12-28 02:33:59,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:33:59,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461649088] [2021-12-28 02:33:59,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:33:59,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:33:59,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:33:59,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:33:59,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat