./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.07.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_1.cil-2+token_ring.07.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 686ecb1010b71c794fc4e873862aa984c2fdfbe32a68bd8271c0851d6420f945 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 02:30:08,386 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 02:30:08,388 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 02:30:08,421 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 02:30:08,422 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 02:30:08,423 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 02:30:08,424 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 02:30:08,425 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 02:30:08,427 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 02:30:08,427 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 02:30:08,428 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 02:30:08,429 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 02:30:08,429 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 02:30:08,430 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 02:30:08,431 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 02:30:08,432 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 02:30:08,433 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 02:30:08,434 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 02:30:08,435 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 02:30:08,436 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 02:30:08,438 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 02:30:08,439 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 02:30:08,440 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 02:30:08,441 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 02:30:08,443 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 02:30:08,443 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 02:30:08,444 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 02:30:08,445 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 02:30:08,445 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 02:30:08,446 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 02:30:08,446 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 02:30:08,447 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 02:30:08,447 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 02:30:08,448 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 02:30:08,449 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 02:30:08,449 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 02:30:08,450 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 02:30:08,450 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 02:30:08,450 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 02:30:08,451 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 02:30:08,452 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 02:30:08,453 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 02:30:08,473 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 02:30:08,473 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 02:30:08,473 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 02:30:08,474 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 02:30:08,474 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 02:30:08,474 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 02:30:08,475 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 02:30:08,475 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 02:30:08,475 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 02:30:08,476 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 02:30:08,476 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 02:30:08,476 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 02:30:08,476 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 02:30:08,477 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 02:30:08,477 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 02:30:08,477 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 02:30:08,477 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 02:30:08,478 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 02:30:08,478 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 02:30:08,478 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 02:30:08,478 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 02:30:08,479 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 02:30:08,479 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 02:30:08,479 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 02:30:08,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 02:30:08,479 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 02:30:08,480 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 02:30:08,480 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 02:30:08,480 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 02:30:08,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 02:30:08,481 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 02:30:08,481 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 02:30:08,481 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 02:30:08,481 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 686ecb1010b71c794fc4e873862aa984c2fdfbe32a68bd8271c0851d6420f945 [2021-12-28 02:30:08,750 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 02:30:08,770 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 02:30:08,774 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 02:30:08,775 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 02:30:08,777 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 02:30:08,778 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.07.cil-1.c [2021-12-28 02:30:08,845 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/268a16627/5e633ba03b17492fbdac2d77533dba5c/FLAG20e0527bd [2021-12-28 02:30:09,454 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 02:30:09,458 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pc_sfifo_1.cil-2+token_ring.07.cil-1.c [2021-12-28 02:30:09,472 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/268a16627/5e633ba03b17492fbdac2d77533dba5c/FLAG20e0527bd [2021-12-28 02:30:09,787 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/268a16627/5e633ba03b17492fbdac2d77533dba5c [2021-12-28 02:30:09,790 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 02:30:09,791 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 02:30:09,792 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 02:30:09,793 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 02:30:09,798 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 02:30:09,798 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 02:30:09" (1/1) ... [2021-12-28 02:30:09,799 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27e7a3e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:30:09, skipping insertion in model container [2021-12-28 02:30:09,799 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 02:30:09" (1/1) ... [2021-12-28 02:30:09,804 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 02:30:09,845 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 02:30:09,959 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_1.cil-2+token_ring.07.cil-1.c[913,926] [2021-12-28 02:30:09,992 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_1.cil-2+token_ring.07.cil-1.c[5977,5990] [2021-12-28 02:30:10,057 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 02:30:10,066 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 02:30:10,128 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_1.cil-2+token_ring.07.cil-1.c[913,926] [2021-12-28 02:30:10,146 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_1.cil-2+token_ring.07.cil-1.c[5977,5990] [2021-12-28 02:30:10,203 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 02:30:10,222 INFO L208 MainTranslator]: Completed translation [2021-12-28 02:30:10,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:30:10 WrapperNode [2021-12-28 02:30:10,223 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 02:30:10,224 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 02:30:10,224 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 02:30:10,224 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 02:30:10,228 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:30:10" (1/1) ... [2021-12-28 02:30:10,241 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:30:10" (1/1) ... [2021-12-28 02:30:10,286 INFO L137 Inliner]: procedures = 62, calls = 69, calls flagged for inlining = 37, calls inlined = 37, statements flattened = 765 [2021-12-28 02:30:10,286 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 02:30:10,287 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 02:30:10,287 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 02:30:10,287 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 02:30:10,294 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:30:10" (1/1) ... [2021-12-28 02:30:10,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:30:10" (1/1) ... [2021-12-28 02:30:10,298 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:30:10" (1/1) ... [2021-12-28 02:30:10,299 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:30:10" (1/1) ... [2021-12-28 02:30:10,309 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:30:10" (1/1) ... [2021-12-28 02:30:10,320 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:30:10" (1/1) ... [2021-12-28 02:30:10,322 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:30:10" (1/1) ... [2021-12-28 02:30:10,327 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 02:30:10,327 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 02:30:10,328 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 02:30:10,328 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 02:30:10,329 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:30:10" (1/1) ... [2021-12-28 02:30:10,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 02:30:10,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:30:10,370 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 02:30:10,396 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 02:30:10,411 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 02:30:10,412 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-28 02:30:10,412 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-28 02:30:10,412 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2021-12-28 02:30:10,412 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2021-12-28 02:30:10,414 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-12-28 02:30:10,414 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-12-28 02:30:10,414 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-12-28 02:30:10,414 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-12-28 02:30:10,415 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-12-28 02:30:10,415 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-12-28 02:30:10,415 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-12-28 02:30:10,415 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-12-28 02:30:10,415 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-12-28 02:30:10,416 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-12-28 02:30:10,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 02:30:10,416 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-12-28 02:30:10,416 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-12-28 02:30:10,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 02:30:10,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 02:30:10,416 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-12-28 02:30:10,417 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-12-28 02:30:10,509 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 02:30:10,511 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 02:30:11,137 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 02:30:11,146 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 02:30:11,150 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2021-12-28 02:30:11,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 02:30:11 BoogieIcfgContainer [2021-12-28 02:30:11,154 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 02:30:11,155 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 02:30:11,156 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 02:30:11,159 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 02:30:11,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 02:30:09" (1/3) ... [2021-12-28 02:30:11,160 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f971d26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 02:30:11, skipping insertion in model container [2021-12-28 02:30:11,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 02:30:10" (2/3) ... [2021-12-28 02:30:11,160 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f971d26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 02:30:11, skipping insertion in model container [2021-12-28 02:30:11,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 02:30:11" (3/3) ... [2021-12-28 02:30:11,163 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2+token_ring.07.cil-1.c [2021-12-28 02:30:11,167 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 02:30:11,167 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-28 02:30:11,205 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 02:30:11,211 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 02:30:11,211 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-28 02:30:11,234 INFO L276 IsEmpty]: Start isEmpty. Operand has 329 states, 290 states have (on average 1.6241379310344828) internal successors, (471), 295 states have internal predecessors, (471), 27 states have call successors, (27), 9 states have call predecessors, (27), 9 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2021-12-28 02:30:11,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-28 02:30:11,241 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:30:11,241 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] [2021-12-28 02:30:11,241 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:30:11,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:30:11,246 INFO L85 PathProgramCache]: Analyzing trace with hash 679233758, now seen corresponding path program 1 times [2021-12-28 02:30:11,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:30:11,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725167507] [2021-12-28 02:30:11,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:11,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:30:11,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:11,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:30:11,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:11,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2021-12-28 02:30:11,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:11,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:30:11,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:30:11,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725167507] [2021-12-28 02:30:11,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725167507] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:30:11,520 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:30:11,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 02:30:11,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058851334] [2021-12-28 02:30:11,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:30:11,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 02:30:11,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:30:11,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 02:30:11,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 02:30:11,569 INFO L87 Difference]: Start difference. First operand has 329 states, 290 states have (on average 1.6241379310344828) internal successors, (471), 295 states have internal predecessors, (471), 27 states have call successors, (27), 9 states have call predecessors, (27), 9 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-28 02:30:11,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:30:11,852 INFO L93 Difference]: Finished difference Result 708 states and 1128 transitions. [2021-12-28 02:30:11,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 02:30:11,855 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2021-12-28 02:30:11,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:30:11,876 INFO L225 Difference]: With dead ends: 708 [2021-12-28 02:30:11,877 INFO L226 Difference]: Without dead ends: 389 [2021-12-28 02:30:11,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 02:30:11,888 INFO L933 BasicCegarLoop]: 505 mSDtfsCounter, 644 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 665 SdHoareTripleChecker+Valid, 825 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 02:30:11,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [665 Valid, 825 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 02:30:11,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-12-28 02:30:11,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 383. [2021-12-28 02:30:11,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 339 states have (on average 1.4985250737463127) internal successors, (508), 343 states have internal predecessors, (508), 31 states have call successors, (31), 11 states have call predecessors, (31), 11 states have return successors, (35), 29 states have call predecessors, (35), 29 states have call successors, (35) [2021-12-28 02:30:11,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 574 transitions. [2021-12-28 02:30:11,995 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 574 transitions. Word has length 44 [2021-12-28 02:30:11,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:30:11,996 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 574 transitions. [2021-12-28 02:30:11,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-28 02:30:11,997 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 574 transitions. [2021-12-28 02:30:12,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-28 02:30:12,004 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:30:12,004 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] [2021-12-28 02:30:12,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 02:30:12,005 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:30:12,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:30:12,006 INFO L85 PathProgramCache]: Analyzing trace with hash -847205656, now seen corresponding path program 1 times [2021-12-28 02:30:12,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:30:12,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944105849] [2021-12-28 02:30:12,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:12,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:30:12,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:12,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:30:12,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:12,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-28 02:30:12,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:12,088 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 02:30:12,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:30:12,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944105849] [2021-12-28 02:30:12,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944105849] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:30:12,089 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:30:12,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 02:30:12,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501678527] [2021-12-28 02:30:12,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:30:12,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 02:30:12,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:30:12,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 02:30:12,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 02:30:12,092 INFO L87 Difference]: Start difference. First operand 383 states and 574 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-28 02:30:12,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:30:12,506 INFO L93 Difference]: Finished difference Result 631 states and 914 transitions. [2021-12-28 02:30:12,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 02:30:12,507 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-12-28 02:30:12,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:30:12,514 INFO L225 Difference]: With dead ends: 631 [2021-12-28 02:30:12,514 INFO L226 Difference]: Without dead ends: 507 [2021-12-28 02:30:12,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 02:30:12,520 INFO L933 BasicCegarLoop]: 529 mSDtfsCounter, 268 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 1048 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 02:30:12,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 1048 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-28 02:30:12,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-12-28 02:30:12,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 450. [2021-12-28 02:30:12,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 400 states have (on average 1.48) internal successors, (592), 404 states have internal predecessors, (592), 34 states have call successors, (34), 14 states have call predecessors, (34), 14 states have return successors, (38), 32 states have call predecessors, (38), 32 states have call successors, (38) [2021-12-28 02:30:12,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 664 transitions. [2021-12-28 02:30:12,553 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 664 transitions. Word has length 45 [2021-12-28 02:30:12,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:30:12,553 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 664 transitions. [2021-12-28 02:30:12,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-28 02:30:12,554 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 664 transitions. [2021-12-28 02:30:12,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-28 02:30:12,555 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:30:12,555 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] [2021-12-28 02:30:12,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 02:30:12,556 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:30:12,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:30:12,556 INFO L85 PathProgramCache]: Analyzing trace with hash -2131563117, now seen corresponding path program 1 times [2021-12-28 02:30:12,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:30:12,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260747772] [2021-12-28 02:30:12,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:12,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:30:12,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:12,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:30:12,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:12,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-28 02:30:12,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:12,617 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 02:30:12,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:30:12,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260747772] [2021-12-28 02:30:12,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260747772] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:30:12,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:30:12,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 02:30:12,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539983535] [2021-12-28 02:30:12,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:30:12,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 02:30:12,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:30:12,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 02:30:12,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 02:30:12,622 INFO L87 Difference]: Start difference. First operand 450 states and 664 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-28 02:30:12,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:30:12,761 INFO L93 Difference]: Finished difference Result 858 states and 1223 transitions. [2021-12-28 02:30:12,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 02:30:12,762 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2021-12-28 02:30:12,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:30:12,769 INFO L225 Difference]: With dead ends: 858 [2021-12-28 02:30:12,769 INFO L226 Difference]: Without dead ends: 667 [2021-12-28 02:30:12,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 02:30:12,775 INFO L933 BasicCegarLoop]: 504 mSDtfsCounter, 653 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 674 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 02:30:12,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [674 Valid, 822 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 02:30:12,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2021-12-28 02:30:12,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 615. [2021-12-28 02:30:12,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 546 states have (on average 1.4322344322344323) internal successors, (782), 553 states have internal predecessors, (782), 45 states have call successors, (45), 21 states have call predecessors, (45), 22 states have return successors, (55), 41 states have call predecessors, (55), 43 states have call successors, (55) [2021-12-28 02:30:12,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 882 transitions. [2021-12-28 02:30:12,824 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 882 transitions. Word has length 45 [2021-12-28 02:30:12,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:30:12,825 INFO L470 AbstractCegarLoop]: Abstraction has 615 states and 882 transitions. [2021-12-28 02:30:12,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-28 02:30:12,825 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 882 transitions. [2021-12-28 02:30:12,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-28 02:30:12,830 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:30:12,830 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] [2021-12-28 02:30:12,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 02:30:12,831 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:30:12,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:30:12,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1411746514, now seen corresponding path program 1 times [2021-12-28 02:30:12,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:30:12,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125566810] [2021-12-28 02:30:12,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:12,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:30:12,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:12,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:30:12,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:12,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-28 02:30:12,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:12,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 02:30:12,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:12,903 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 02:30:12,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:30:12,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125566810] [2021-12-28 02:30:12,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125566810] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:30:12,904 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:30:12,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 02:30:12,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330844808] [2021-12-28 02:30:12,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:30:12,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 02:30:12,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:30:12,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 02:30:12,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 02:30:12,906 INFO L87 Difference]: Start difference. First operand 615 states and 882 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-28 02:30:13,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:30:13,222 INFO L93 Difference]: Finished difference Result 1199 states and 1667 transitions. [2021-12-28 02:30:13,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 02:30:13,223 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 62 [2021-12-28 02:30:13,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:30:13,227 INFO L225 Difference]: With dead ends: 1199 [2021-12-28 02:30:13,227 INFO L226 Difference]: Without dead ends: 843 [2021-12-28 02:30:13,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 02:30:13,242 INFO L933 BasicCegarLoop]: 553 mSDtfsCounter, 252 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 1103 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 02:30:13,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 1103 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 02:30:13,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2021-12-28 02:30:13,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 805. [2021-12-28 02:30:13,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 712 states have (on average 1.3792134831460674) internal successors, (982), 721 states have internal predecessors, (982), 59 states have call successors, (59), 29 states have call predecessors, (59), 32 states have return successors, (79), 55 states have call predecessors, (79), 57 states have call successors, (79) [2021-12-28 02:30:13,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 1120 transitions. [2021-12-28 02:30:13,272 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 1120 transitions. Word has length 62 [2021-12-28 02:30:13,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:30:13,272 INFO L470 AbstractCegarLoop]: Abstraction has 805 states and 1120 transitions. [2021-12-28 02:30:13,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-28 02:30:13,273 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 1120 transitions. [2021-12-28 02:30:13,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-28 02:30:13,275 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:30:13,275 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] [2021-12-28 02:30:13,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 02:30:13,275 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:30:13,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:30:13,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1771502045, now seen corresponding path program 1 times [2021-12-28 02:30:13,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:30:13,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864706192] [2021-12-28 02:30:13,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:13,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:30:13,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:13,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:30:13,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:13,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-28 02:30:13,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:13,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-28 02:30:13,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:13,324 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-28 02:30:13,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:30:13,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864706192] [2021-12-28 02:30:13,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864706192] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:30:13,325 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:30:13,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 02:30:13,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155672757] [2021-12-28 02:30:13,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:30:13,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 02:30:13,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:30:13,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 02:30:13,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 02:30:13,327 INFO L87 Difference]: Start difference. First operand 805 states and 1120 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-28 02:30:13,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:30:13,471 INFO L93 Difference]: Finished difference Result 1458 states and 1973 transitions. [2021-12-28 02:30:13,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 02:30:13,472 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 67 [2021-12-28 02:30:13,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:30:13,476 INFO L225 Difference]: With dead ends: 1458 [2021-12-28 02:30:13,477 INFO L226 Difference]: Without dead ends: 1004 [2021-12-28 02:30:13,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-28 02:30:13,479 INFO L933 BasicCegarLoop]: 499 mSDtfsCounter, 640 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 661 SdHoareTripleChecker+Valid, 819 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 02:30:13,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [661 Valid, 819 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 02:30:13,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1004 states. [2021-12-28 02:30:13,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1004 to 949. [2021-12-28 02:30:13,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 949 states, 840 states have (on average 1.348809523809524) internal successors, (1133), 851 states have internal predecessors, (1133), 67 states have call successors, (67), 35 states have call predecessors, (67), 40 states have return successors, (93), 63 states have call predecessors, (93), 65 states have call successors, (93) [2021-12-28 02:30:13,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 1293 transitions. [2021-12-28 02:30:13,532 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 1293 transitions. Word has length 67 [2021-12-28 02:30:13,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:30:13,532 INFO L470 AbstractCegarLoop]: Abstraction has 949 states and 1293 transitions. [2021-12-28 02:30:13,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-28 02:30:13,533 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 1293 transitions. [2021-12-28 02:30:13,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-28 02:30:13,534 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:30:13,535 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 02:30:13,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 02:30:13,535 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:30:13,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:30:13,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1913188561, now seen corresponding path program 1 times [2021-12-28 02:30:13,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:30:13,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364153812] [2021-12-28 02:30:13,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:13,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:30:13,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:13,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:30:13,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:13,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-28 02:30:13,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:13,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-28 02:30:13,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:13,628 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 02:30:13,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:30:13,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364153812] [2021-12-28 02:30:13,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364153812] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:30:13,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736909374] [2021-12-28 02:30:13,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:13,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:30:13,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:30:13,639 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 02:30:13,647 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 02:30:13,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:13,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-28 02:30:13,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:30:13,967 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:30:13,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 02:30:14,136 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-28 02:30:14,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736909374] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-28 02:30:14,137 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-28 02:30:14,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 8 [2021-12-28 02:30:14,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189023997] [2021-12-28 02:30:14,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:30:14,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 02:30:14,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:30:14,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 02:30:14,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:30:14,139 INFO L87 Difference]: Start difference. First operand 949 states and 1293 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-28 02:30:14,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:30:14,281 INFO L93 Difference]: Finished difference Result 1005 states and 1361 transitions. [2021-12-28 02:30:14,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 02:30:14,281 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 68 [2021-12-28 02:30:14,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:30:14,286 INFO L225 Difference]: With dead ends: 1005 [2021-12-28 02:30:14,286 INFO L226 Difference]: Without dead ends: 1002 [2021-12-28 02:30:14,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-28 02:30:14,293 INFO L933 BasicCegarLoop]: 508 mSDtfsCounter, 869 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 869 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 02:30:14,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [869 Valid, 575 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 02:30:14,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2021-12-28 02:30:14,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 948. [2021-12-28 02:30:14,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 840 states have (on average 1.3464285714285715) internal successors, (1131), 850 states have internal predecessors, (1131), 66 states have call successors, (66), 35 states have call predecessors, (66), 40 states have return successors, (93), 63 states have call predecessors, (93), 65 states have call successors, (93) [2021-12-28 02:30:14,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1290 transitions. [2021-12-28 02:30:14,337 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1290 transitions. Word has length 68 [2021-12-28 02:30:14,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:30:14,338 INFO L470 AbstractCegarLoop]: Abstraction has 948 states and 1290 transitions. [2021-12-28 02:30:14,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-28 02:30:14,339 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1290 transitions. [2021-12-28 02:30:14,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-28 02:30:14,340 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:30:14,341 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 02:30:14,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-28 02:30:14,555 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,SelfDestructingSolverStorable5 [2021-12-28 02:30:14,556 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:30:14,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:30:14,556 INFO L85 PathProgramCache]: Analyzing trace with hash -821723040, now seen corresponding path program 1 times [2021-12-28 02:30:14,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:30:14,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198964026] [2021-12-28 02:30:14,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:14,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:30:14,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:14,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:30:14,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:14,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-28 02:30:14,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:14,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-28 02:30:14,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:14,663 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-28 02:30:14,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:30:14,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198964026] [2021-12-28 02:30:14,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198964026] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:30:14,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138178850] [2021-12-28 02:30:14,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:14,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:30:14,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:30:14,668 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 02:30:14,697 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 02:30:14,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:14,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-28 02:30:14,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:30:15,119 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:30:15,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 02:30:15,241 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-28 02:30:15,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138178850] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 02:30:15,241 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 02:30:15,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2021-12-28 02:30:15,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769197574] [2021-12-28 02:30:15,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 02:30:15,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-28 02:30:15,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:30:15,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-28 02:30:15,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:30:15,244 INFO L87 Difference]: Start difference. First operand 948 states and 1290 transitions. Second operand has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-28 02:30:16,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:30:16,565 INFO L93 Difference]: Finished difference Result 2648 states and 3510 transitions. [2021-12-28 02:30:16,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-12-28 02:30:16,566 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 69 [2021-12-28 02:30:16,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:30:16,574 INFO L225 Difference]: With dead ends: 2648 [2021-12-28 02:30:16,574 INFO L226 Difference]: Without dead ends: 2104 [2021-12-28 02:30:16,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=324, Invalid=1482, Unknown=0, NotChecked=0, Total=1806 [2021-12-28 02:30:16,578 INFO L933 BasicCegarLoop]: 613 mSDtfsCounter, 1007 mSDsluCounter, 2442 mSDsCounter, 0 mSdLazyCounter, 1445 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1035 SdHoareTripleChecker+Valid, 3055 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-28 02:30:16,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1035 Valid, 3055 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1445 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-28 02:30:16,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2104 states. [2021-12-28 02:30:16,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2104 to 1337. [2021-12-28 02:30:16,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1337 states, 1190 states have (on average 1.315126050420168) internal successors, (1565), 1208 states have internal predecessors, (1565), 86 states have call successors, (86), 49 states have call predecessors, (86), 59 states have return successors, (127), 80 states have call predecessors, (127), 85 states have call successors, (127) [2021-12-28 02:30:16,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 1778 transitions. [2021-12-28 02:30:16,669 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 1778 transitions. Word has length 69 [2021-12-28 02:30:16,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:30:16,670 INFO L470 AbstractCegarLoop]: Abstraction has 1337 states and 1778 transitions. [2021-12-28 02:30:16,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 10 states have internal predecessors, (151), 7 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-28 02:30:16,670 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 1778 transitions. [2021-12-28 02:30:16,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-28 02:30:16,673 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:30:16,673 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-28 02:30:16,698 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 02:30:16,889 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,SelfDestructingSolverStorable6 [2021-12-28 02:30:16,890 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:30:16,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:30:16,890 INFO L85 PathProgramCache]: Analyzing trace with hash 703078240, now seen corresponding path program 1 times [2021-12-28 02:30:16,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:30:16,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702282648] [2021-12-28 02:30:16,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:16,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:30:16,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:16,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:30:16,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:16,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-28 02:30:16,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:16,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-12-28 02:30:16,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:16,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-28 02:30:16,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:16,969 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-28 02:30:16,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:30:16,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702282648] [2021-12-28 02:30:16,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702282648] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:30:16,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279687640] [2021-12-28 02:30:16,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:16,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:30:16,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:30:16,971 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 02:30:16,982 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 02:30:17,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:17,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-28 02:30:17,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:30:17,195 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-28 02:30:17,195 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:30:17,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279687640] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:30:17,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 02:30:17,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-28 02:30:17,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579857061] [2021-12-28 02:30:17,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:30:17,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:30:17,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:30:17,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:30:17,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:30:17,198 INFO L87 Difference]: Start difference. First operand 1337 states and 1778 transitions. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-28 02:30:17,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:30:17,249 INFO L93 Difference]: Finished difference Result 2060 states and 2716 transitions. [2021-12-28 02:30:17,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:30:17,249 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 88 [2021-12-28 02:30:17,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:30:17,255 INFO L225 Difference]: With dead ends: 2060 [2021-12-28 02:30:17,255 INFO L226 Difference]: Without dead ends: 1215 [2021-12-28 02:30:17,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:30:17,257 INFO L933 BasicCegarLoop]: 514 mSDtfsCounter, 443 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:30:17,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 589 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:30:17,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1215 states. [2021-12-28 02:30:17,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1215 to 1200. [2021-12-28 02:30:17,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1200 states, 1069 states have (on average 1.3161833489242283) internal successors, (1407), 1086 states have internal predecessors, (1407), 78 states have call successors, (78), 43 states have call predecessors, (78), 51 states have return successors, (113), 71 states have call predecessors, (113), 77 states have call successors, (113) [2021-12-28 02:30:17,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 1598 transitions. [2021-12-28 02:30:17,323 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 1598 transitions. Word has length 88 [2021-12-28 02:30:17,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:30:17,324 INFO L470 AbstractCegarLoop]: Abstraction has 1200 states and 1598 transitions. [2021-12-28 02:30:17,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-28 02:30:17,324 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 1598 transitions. [2021-12-28 02:30:17,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-28 02:30:17,332 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:30:17,332 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 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 02:30:17,358 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 02:30:17,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:30:17,548 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:30:17,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:30:17,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1962786176, now seen corresponding path program 1 times [2021-12-28 02:30:17,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:30:17,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918198358] [2021-12-28 02:30:17,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:17,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:30:17,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:17,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-28 02:30:17,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:17,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-28 02:30:17,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:17,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-12-28 02:30:17,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:17,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-28 02:30:17,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:17,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-12-28 02:30:17,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:17,616 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-12-28 02:30:17,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:30:17,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918198358] [2021-12-28 02:30:17,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918198358] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 02:30:17,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161006244] [2021-12-28 02:30:17,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:17,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:30:17,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 02:30:17,619 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 02:30:17,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-28 02:30:17,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:17,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-28 02:30:17,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 02:30:17,889 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-28 02:30:17,889 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 02:30:17,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161006244] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:30:17,889 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 02:30:17,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-28 02:30:17,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083641036] [2021-12-28 02:30:17,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:30:17,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 02:30:17,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:30:17,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 02:30:17,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:30:17,891 INFO L87 Difference]: Start difference. First operand 1200 states and 1598 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-28 02:30:17,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:30:17,937 INFO L93 Difference]: Finished difference Result 1579 states and 2066 transitions. [2021-12-28 02:30:17,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 02:30:17,938 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 103 [2021-12-28 02:30:17,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:30:17,939 INFO L225 Difference]: With dead ends: 1579 [2021-12-28 02:30:17,939 INFO L226 Difference]: Without dead ends: 253 [2021-12-28 02:30:17,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:30:17,942 INFO L933 BasicCegarLoop]: 528 mSDtfsCounter, 62 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 986 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 02:30:17,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 986 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 02:30:17,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-12-28 02:30:17,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2021-12-28 02:30:17,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 225 states have (on average 1.551111111111111) internal successors, (349), 226 states have internal predecessors, (349), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-12-28 02:30:17,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 391 transitions. [2021-12-28 02:30:17,952 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 391 transitions. Word has length 103 [2021-12-28 02:30:17,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:30:17,952 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 391 transitions. [2021-12-28 02:30:17,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-28 02:30:17,952 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 391 transitions. [2021-12-28 02:30:17,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-28 02:30:17,962 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:30:17,962 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] [2021-12-28 02:30:17,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-28 02:30:18,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 02:30:18,184 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:30:18,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:30:18,184 INFO L85 PathProgramCache]: Analyzing trace with hash 366966274, now seen corresponding path program 1 times [2021-12-28 02:30:18,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:30:18,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827616194] [2021-12-28 02:30:18,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:18,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:30:18,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:18,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:30:18,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:18,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:30:18,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:18,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-28 02:30:18,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:18,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-28 02:30:18,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:18,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-28 02:30:18,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:18,287 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 02:30:18,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:30:18,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827616194] [2021-12-28 02:30:18,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827616194] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:30:18,288 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:30:18,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 02:30:18,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574683603] [2021-12-28 02:30:18,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:30:18,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 02:30:18,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:30:18,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 02:30:18,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 02:30:18,290 INFO L87 Difference]: Start difference. First operand 253 states and 391 transitions. Second operand has 5 states, 5 states have (on average 22.6) internal successors, (113), 3 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:30:18,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:30:18,984 INFO L93 Difference]: Finished difference Result 581 states and 913 transitions. [2021-12-28 02:30:18,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 02:30:18,985 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 3 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 123 [2021-12-28 02:30:18,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:30:18,987 INFO L225 Difference]: With dead ends: 581 [2021-12-28 02:30:18,987 INFO L226 Difference]: Without dead ends: 340 [2021-12-28 02:30:18,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-28 02:30:18,988 INFO L933 BasicCegarLoop]: 427 mSDtfsCounter, 650 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 669 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-28 02:30:18,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [669 Valid, 689 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-28 02:30:18,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-12-28 02:30:19,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 253. [2021-12-28 02:30:19,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 225 states have (on average 1.5466666666666666) internal successors, (348), 226 states have internal predecessors, (348), 21 states have call successors, (21), 6 states have call predecessors, (21), 6 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-12-28 02:30:19,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 390 transitions. [2021-12-28 02:30:19,002 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 390 transitions. Word has length 123 [2021-12-28 02:30:19,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:30:19,002 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 390 transitions. [2021-12-28 02:30:19,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.6) internal successors, (113), 3 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:30:19,002 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 390 transitions. [2021-12-28 02:30:19,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-28 02:30:19,003 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:30:19,004 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] [2021-12-28 02:30:19,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-28 02:30:19,004 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:30:19,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:30:19,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1796650300, now seen corresponding path program 1 times [2021-12-28 02:30:19,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:30:19,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752037] [2021-12-28 02:30:19,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:19,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:30:19,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:19,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:30:19,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:19,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:30:19,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:19,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-28 02:30:19,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:19,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-28 02:30:19,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:19,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-28 02:30:19,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:19,090 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 02:30:19,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:30:19,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752037] [2021-12-28 02:30:19,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752037] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:30:19,091 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:30:19,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-28 02:30:19,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457489991] [2021-12-28 02:30:19,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:30:19,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 02:30:19,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:30:19,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 02:30:19,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-28 02:30:19,093 INFO L87 Difference]: Start difference. First operand 253 states and 390 transitions. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:30:20,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:30:20,627 INFO L93 Difference]: Finished difference Result 909 states and 1437 transitions. [2021-12-28 02:30:20,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-28 02:30:20,628 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 123 [2021-12-28 02:30:20,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:30:20,630 INFO L225 Difference]: With dead ends: 909 [2021-12-28 02:30:20,630 INFO L226 Difference]: Without dead ends: 672 [2021-12-28 02:30:20,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:30:20,632 INFO L933 BasicCegarLoop]: 490 mSDtfsCounter, 978 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 1315 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 992 SdHoareTripleChecker+Valid, 1185 SdHoareTripleChecker+Invalid, 1411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-28 02:30:20,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [992 Valid, 1185 Invalid, 1411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1315 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-28 02:30:20,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2021-12-28 02:30:20,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 499. [2021-12-28 02:30:20,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 448 states have (on average 1.5602678571428572) internal successors, (699), 450 states have internal predecessors, (699), 37 states have call successors, (37), 12 states have call predecessors, (37), 13 states have return successors, (40), 37 states have call predecessors, (40), 37 states have call successors, (40) [2021-12-28 02:30:20,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 776 transitions. [2021-12-28 02:30:20,663 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 776 transitions. Word has length 123 [2021-12-28 02:30:20,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:30:20,664 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 776 transitions. [2021-12-28 02:30:20,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:30:20,665 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 776 transitions. [2021-12-28 02:30:20,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-28 02:30:20,667 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:30:20,667 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] [2021-12-28 02:30:20,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-28 02:30:20,667 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:30:20,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:30:20,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1772752968, now seen corresponding path program 1 times [2021-12-28 02:30:20,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:30:20,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142538027] [2021-12-28 02:30:20,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:20,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:30:20,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:20,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:30:20,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:20,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:30:20,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:20,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-28 02:30:20,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:20,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-28 02:30:20,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:20,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-28 02:30:20,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:20,782 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 02:30:20,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:30:20,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142538027] [2021-12-28 02:30:20,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142538027] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:30:20,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:30:20,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:30:20,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556676292] [2021-12-28 02:30:20,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:30:20,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:30:20,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:30:20,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:30:20,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:30:20,786 INFO L87 Difference]: Start difference. First operand 499 states and 776 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:30:22,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:30:22,472 INFO L93 Difference]: Finished difference Result 1497 states and 2366 transitions. [2021-12-28 02:30:22,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:30:22,473 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 123 [2021-12-28 02:30:22,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:30:22,483 INFO L225 Difference]: With dead ends: 1497 [2021-12-28 02:30:22,483 INFO L226 Difference]: Without dead ends: 1014 [2021-12-28 02:30:22,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-28 02:30:22,485 INFO L933 BasicCegarLoop]: 648 mSDtfsCounter, 992 mSDsluCounter, 1236 mSDsCounter, 0 mSdLazyCounter, 1992 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1006 SdHoareTripleChecker+Valid, 1884 SdHoareTripleChecker+Invalid, 2062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-28 02:30:22,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1006 Valid, 1884 Invalid, 2062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1992 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-28 02:30:22,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2021-12-28 02:30:22,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 728. [2021-12-28 02:30:22,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 728 states, 654 states have (on average 1.5535168195718654) internal successors, (1016), 657 states have internal predecessors, (1016), 53 states have call successors, (53), 18 states have call predecessors, (53), 20 states have return successors, (58), 54 states have call predecessors, (58), 53 states have call successors, (58) [2021-12-28 02:30:22,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 1127 transitions. [2021-12-28 02:30:22,538 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 1127 transitions. Word has length 123 [2021-12-28 02:30:22,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:30:22,538 INFO L470 AbstractCegarLoop]: Abstraction has 728 states and 1127 transitions. [2021-12-28 02:30:22,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:30:22,539 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 1127 transitions. [2021-12-28 02:30:22,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-28 02:30:22,540 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:30:22,540 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] [2021-12-28 02:30:22,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-28 02:30:22,541 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:30:22,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:30:22,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1132920314, now seen corresponding path program 1 times [2021-12-28 02:30:22,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:30:22,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886400340] [2021-12-28 02:30:22,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:22,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:30:22,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:22,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:30:22,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:22,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:30:22,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:22,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-28 02:30:22,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:22,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-28 02:30:22,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:22,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-28 02:30:22,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:22,638 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 02:30:22,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:30:22,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886400340] [2021-12-28 02:30:22,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886400340] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:30:22,639 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:30:22,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:30:22,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970106212] [2021-12-28 02:30:22,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:30:22,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:30:22,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:30:22,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:30:22,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:30:22,641 INFO L87 Difference]: Start difference. First operand 728 states and 1127 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:30:24,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:30:24,394 INFO L93 Difference]: Finished difference Result 2362 states and 3725 transitions. [2021-12-28 02:30:24,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:30:24,394 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 123 [2021-12-28 02:30:24,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:30:24,404 INFO L225 Difference]: With dead ends: 2362 [2021-12-28 02:30:24,404 INFO L226 Difference]: Without dead ends: 1650 [2021-12-28 02:30:24,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-28 02:30:24,409 INFO L933 BasicCegarLoop]: 479 mSDtfsCounter, 1054 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 1767 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1068 SdHoareTripleChecker+Valid, 1307 SdHoareTripleChecker+Invalid, 1865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-28 02:30:24,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1068 Valid, 1307 Invalid, 1865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1767 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-28 02:30:24,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2021-12-28 02:30:24,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 1190. [2021-12-28 02:30:24,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1190 states, 1070 states have (on average 1.5485981308411214) internal successors, (1657), 1075 states have internal predecessors, (1657), 85 states have call successors, (85), 30 states have call predecessors, (85), 34 states have return successors, (98), 88 states have call predecessors, (98), 85 states have call successors, (98) [2021-12-28 02:30:24,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 1840 transitions. [2021-12-28 02:30:24,491 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 1840 transitions. Word has length 123 [2021-12-28 02:30:24,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:30:24,491 INFO L470 AbstractCegarLoop]: Abstraction has 1190 states and 1840 transitions. [2021-12-28 02:30:24,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:30:24,492 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 1840 transitions. [2021-12-28 02:30:24,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-28 02:30:24,494 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:30:24,494 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] [2021-12-28 02:30:24,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-28 02:30:24,494 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:30:24,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:30:24,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1295338308, now seen corresponding path program 1 times [2021-12-28 02:30:24,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:30:24,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264495602] [2021-12-28 02:30:24,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:24,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:30:24,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:24,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:30:24,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:24,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:30:24,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:24,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-28 02:30:24,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:24,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-28 02:30:24,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:24,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-28 02:30:24,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:24,613 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 02:30:24,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:30:24,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264495602] [2021-12-28 02:30:24,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264495602] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:30:24,614 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:30:24,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:30:24,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728667279] [2021-12-28 02:30:24,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:30:24,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:30:24,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:30:24,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:30:24,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:30:24,616 INFO L87 Difference]: Start difference. First operand 1190 states and 1840 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:30:26,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:30:26,503 INFO L93 Difference]: Finished difference Result 4034 states and 6338 transitions. [2021-12-28 02:30:26,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:30:26,503 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 123 [2021-12-28 02:30:26,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:30:26,515 INFO L225 Difference]: With dead ends: 4034 [2021-12-28 02:30:26,515 INFO L226 Difference]: Without dead ends: 2860 [2021-12-28 02:30:26,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-28 02:30:26,520 INFO L933 BasicCegarLoop]: 631 mSDtfsCounter, 985 mSDsluCounter, 1236 mSDsCounter, 0 mSdLazyCounter, 1973 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 999 SdHoareTripleChecker+Valid, 1867 SdHoareTripleChecker+Invalid, 2045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-28 02:30:26,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [999 Valid, 1867 Invalid, 2045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1973 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-28 02:30:26,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2860 states. [2021-12-28 02:30:26,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2860 to 2115. [2021-12-28 02:30:26,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2115 states, 1903 states have (on average 1.5444035733053074) internal successors, (2939), 1912 states have internal predecessors, (2939), 149 states have call successors, (149), 54 states have call predecessors, (149), 62 states have return successors, (184), 156 states have call predecessors, (184), 149 states have call successors, (184) [2021-12-28 02:30:26,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2115 states to 2115 states and 3272 transitions. [2021-12-28 02:30:26,659 INFO L78 Accepts]: Start accepts. Automaton has 2115 states and 3272 transitions. Word has length 123 [2021-12-28 02:30:26,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:30:26,660 INFO L470 AbstractCegarLoop]: Abstraction has 2115 states and 3272 transitions. [2021-12-28 02:30:26,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:30:26,660 INFO L276 IsEmpty]: Start isEmpty. Operand 2115 states and 3272 transitions. [2021-12-28 02:30:26,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-28 02:30:26,662 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:30:26,662 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] [2021-12-28 02:30:26,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-28 02:30:26,663 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:30:26,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:30:26,663 INFO L85 PathProgramCache]: Analyzing trace with hash -11804090, now seen corresponding path program 1 times [2021-12-28 02:30:26,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:30:26,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80075848] [2021-12-28 02:30:26,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:26,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:30:26,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:26,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:30:26,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:26,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:30:26,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:26,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-28 02:30:26,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:26,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-28 02:30:26,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:26,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-28 02:30:26,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:26,774 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 02:30:26,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:30:26,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80075848] [2021-12-28 02:30:26,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80075848] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:30:26,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:30:26,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:30:26,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417472132] [2021-12-28 02:30:26,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:30:26,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:30:26,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:30:26,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:30:26,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:30:26,776 INFO L87 Difference]: Start difference. First operand 2115 states and 3272 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:30:28,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:30:28,658 INFO L93 Difference]: Finished difference Result 7377 states and 11580 transitions. [2021-12-28 02:30:28,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:30:28,658 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 123 [2021-12-28 02:30:28,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:30:28,684 INFO L225 Difference]: With dead ends: 7377 [2021-12-28 02:30:28,684 INFO L226 Difference]: Without dead ends: 5278 [2021-12-28 02:30:28,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-28 02:30:28,693 INFO L933 BasicCegarLoop]: 626 mSDtfsCounter, 984 mSDsluCounter, 1236 mSDsCounter, 0 mSdLazyCounter, 1965 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 998 SdHoareTripleChecker+Valid, 1862 SdHoareTripleChecker+Invalid, 2037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-28 02:30:28,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [998 Valid, 1862 Invalid, 2037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1965 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-28 02:30:28,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5278 states. [2021-12-28 02:30:28,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5278 to 3972. [2021-12-28 02:30:28,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3972 states, 3576 states have (on average 1.5416666666666667) internal successors, (5513), 3593 states have internal predecessors, (5513), 277 states have call successors, (277), 102 states have call predecessors, (277), 118 states have return successors, (374), 292 states have call predecessors, (374), 277 states have call successors, (374) [2021-12-28 02:30:29,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3972 states to 3972 states and 6164 transitions. [2021-12-28 02:30:29,003 INFO L78 Accepts]: Start accepts. Automaton has 3972 states and 6164 transitions. Word has length 123 [2021-12-28 02:30:29,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:30:29,004 INFO L470 AbstractCegarLoop]: Abstraction has 3972 states and 6164 transitions. [2021-12-28 02:30:29,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:30:29,004 INFO L276 IsEmpty]: Start isEmpty. Operand 3972 states and 6164 transitions. [2021-12-28 02:30:29,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-28 02:30:29,007 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:30:29,008 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] [2021-12-28 02:30:29,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-28 02:30:29,008 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:30:29,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:30:29,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1885692676, now seen corresponding path program 1 times [2021-12-28 02:30:29,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:30:29,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552232883] [2021-12-28 02:30:29,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:29,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:30:29,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:29,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:30:29,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:29,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:30:29,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:29,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-28 02:30:29,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:29,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-28 02:30:29,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:29,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-28 02:30:29,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:29,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:30:29,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:30:29,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552232883] [2021-12-28 02:30:29,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552232883] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:30:29,119 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:30:29,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:30:29,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209908429] [2021-12-28 02:30:29,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:30:29,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:30:29,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:30:29,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:30:29,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:30:29,121 INFO L87 Difference]: Start difference. First operand 3972 states and 6164 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:30:31,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:30:31,167 INFO L93 Difference]: Finished difference Result 14064 states and 22126 transitions. [2021-12-28 02:30:31,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:30:31,169 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 123 [2021-12-28 02:30:31,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:30:31,231 INFO L225 Difference]: With dead ends: 14064 [2021-12-28 02:30:31,232 INFO L226 Difference]: Without dead ends: 10108 [2021-12-28 02:30:31,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-28 02:30:31,249 INFO L933 BasicCegarLoop]: 621 mSDtfsCounter, 983 mSDsluCounter, 1236 mSDsCounter, 0 mSdLazyCounter, 1957 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 997 SdHoareTripleChecker+Valid, 1857 SdHoareTripleChecker+Invalid, 2029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-28 02:30:31,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [997 Valid, 1857 Invalid, 2029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1957 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-28 02:30:31,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10108 states. [2021-12-28 02:30:31,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10108 to 7701. [2021-12-28 02:30:31,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7701 states, 6937 states have (on average 1.5400028830906731) internal successors, (10683), 6970 states have internal predecessors, (10683), 533 states have call successors, (533), 198 states have call predecessors, (533), 230 states have return successors, (808), 564 states have call predecessors, (808), 533 states have call successors, (808) [2021-12-28 02:30:31,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7701 states to 7701 states and 12024 transitions. [2021-12-28 02:30:31,784 INFO L78 Accepts]: Start accepts. Automaton has 7701 states and 12024 transitions. Word has length 123 [2021-12-28 02:30:31,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:30:31,785 INFO L470 AbstractCegarLoop]: Abstraction has 7701 states and 12024 transitions. [2021-12-28 02:30:31,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:30:31,785 INFO L276 IsEmpty]: Start isEmpty. Operand 7701 states and 12024 transitions. [2021-12-28 02:30:31,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-28 02:30:31,790 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:30:31,791 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] [2021-12-28 02:30:31,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-28 02:30:31,791 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:30:31,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:30:31,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1378233722, now seen corresponding path program 1 times [2021-12-28 02:30:31,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:30:31,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044877022] [2021-12-28 02:30:31,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:31,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:30:31,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:31,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:30:31,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:31,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:30:31,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:31,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-28 02:30:31,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:31,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-28 02:30:31,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:31,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-28 02:30:31,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:31,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 02:30:31,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:30:31,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044877022] [2021-12-28 02:30:31,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044877022] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:30:31,882 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:30:31,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:30:31,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995869903] [2021-12-28 02:30:31,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:30:31,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:30:31,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:30:31,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:30:31,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:30:31,884 INFO L87 Difference]: Start difference. First operand 7701 states and 12024 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:30:34,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:30:34,467 INFO L93 Difference]: Finished difference Result 27439 states and 43412 transitions. [2021-12-28 02:30:34,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 02:30:34,469 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 123 [2021-12-28 02:30:34,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:30:34,541 INFO L225 Difference]: With dead ends: 27439 [2021-12-28 02:30:34,542 INFO L226 Difference]: Without dead ends: 19754 [2021-12-28 02:30:34,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-28 02:30:34,577 INFO L933 BasicCegarLoop]: 616 mSDtfsCounter, 982 mSDsluCounter, 1236 mSDsCounter, 0 mSdLazyCounter, 1949 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 996 SdHoareTripleChecker+Valid, 1852 SdHoareTripleChecker+Invalid, 2021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-28 02:30:34,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [996 Valid, 1852 Invalid, 2021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1949 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-28 02:30:34,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19754 states. [2021-12-28 02:30:35,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19754 to 15190. [2021-12-28 02:30:35,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15190 states, 13690 states have (on average 1.5390065741417094) internal successors, (21069), 13755 states have internal predecessors, (21069), 1045 states have call successors, (1045), 390 states have call predecessors, (1045), 454 states have return successors, (1838), 1108 states have call predecessors, (1838), 1045 states have call successors, (1838) [2021-12-28 02:30:35,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15190 states to 15190 states and 23952 transitions. [2021-12-28 02:30:35,661 INFO L78 Accepts]: Start accepts. Automaton has 15190 states and 23952 transitions. Word has length 123 [2021-12-28 02:30:35,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:30:35,662 INFO L470 AbstractCegarLoop]: Abstraction has 15190 states and 23952 transitions. [2021-12-28 02:30:35,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:30:35,662 INFO L276 IsEmpty]: Start isEmpty. Operand 15190 states and 23952 transitions. [2021-12-28 02:30:35,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-28 02:30:35,674 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:30:35,675 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] [2021-12-28 02:30:35,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-28 02:30:35,675 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:30:35,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:30:35,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1010330308, now seen corresponding path program 1 times [2021-12-28 02:30:35,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:30:35,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508995933] [2021-12-28 02:30:35,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:35,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:30:35,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:35,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:30:35,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:35,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:30:35,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:35,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-28 02:30:35,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:35,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-28 02:30:35,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:35,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-28 02:30:35,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:35,782 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 02:30:35,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:30:35,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508995933] [2021-12-28 02:30:35,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508995933] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:30:35,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:30:35,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:30:35,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231762183] [2021-12-28 02:30:35,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:30:35,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:30:35,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:30:35,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:30:35,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:30:35,785 INFO L87 Difference]: Start difference. First operand 15190 states and 23952 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:30:40,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:30:40,651 INFO L93 Difference]: Finished difference Result 61038 states and 96956 transitions. [2021-12-28 02:30:40,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 02:30:40,652 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 123 [2021-12-28 02:30:40,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:30:40,813 INFO L225 Difference]: With dead ends: 61038 [2021-12-28 02:30:40,813 INFO L226 Difference]: Without dead ends: 45864 [2021-12-28 02:30:40,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-28 02:30:40,873 INFO L933 BasicCegarLoop]: 609 mSDtfsCounter, 1272 mSDsluCounter, 1228 mSDsCounter, 0 mSdLazyCounter, 1934 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1294 SdHoareTripleChecker+Valid, 1837 SdHoareTripleChecker+Invalid, 2011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-28 02:30:40,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1294 Valid, 1837 Invalid, 2011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1934 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-28 02:30:40,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45864 states. [2021-12-28 02:30:43,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45864 to 30039. [2021-12-28 02:30:43,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30039 states, 27131 states have (on average 1.5409310382956765) internal successors, (41807), 27260 states have internal predecessors, (41807), 2005 states have call successors, (2005), 774 states have call predecessors, (2005), 902 states have return successors, (4320), 2132 states have call predecessors, (4320), 2005 states have call successors, (4320) [2021-12-28 02:30:43,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30039 states to 30039 states and 48132 transitions. [2021-12-28 02:30:43,204 INFO L78 Accepts]: Start accepts. Automaton has 30039 states and 48132 transitions. Word has length 123 [2021-12-28 02:30:43,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:30:43,204 INFO L470 AbstractCegarLoop]: Abstraction has 30039 states and 48132 transitions. [2021-12-28 02:30:43,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:30:43,205 INFO L276 IsEmpty]: Start isEmpty. Operand 30039 states and 48132 transitions. [2021-12-28 02:30:43,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-28 02:30:43,225 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:30:43,225 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] [2021-12-28 02:30:43,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-28 02:30:43,226 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:30:43,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:30:43,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1683565882, now seen corresponding path program 1 times [2021-12-28 02:30:43,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:30:43,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768293106] [2021-12-28 02:30:43,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:43,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:30:43,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:43,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:30:43,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:43,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:30:43,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:43,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-28 02:30:43,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:43,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-28 02:30:43,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:43,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-28 02:30:43,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:43,329 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 02:30:43,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:30:43,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768293106] [2021-12-28 02:30:43,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768293106] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:30:43,329 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:30:43,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:30:43,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788095970] [2021-12-28 02:30:43,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:30:43,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:30:43,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:30:43,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:30:43,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:30:43,332 INFO L87 Difference]: Start difference. First operand 30039 states and 48132 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:30:52,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:30:52,192 INFO L93 Difference]: Finished difference Result 119277 states and 192322 transitions. [2021-12-28 02:30:52,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 02:30:52,193 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 123 [2021-12-28 02:30:52,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:30:52,617 INFO L225 Difference]: With dead ends: 119277 [2021-12-28 02:30:52,617 INFO L226 Difference]: Without dead ends: 89254 [2021-12-28 02:30:52,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-28 02:30:52,728 INFO L933 BasicCegarLoop]: 709 mSDtfsCounter, 1045 mSDsluCounter, 1225 mSDsCounter, 0 mSdLazyCounter, 2246 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1058 SdHoareTripleChecker+Valid, 1934 SdHoareTripleChecker+Invalid, 2323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 2246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-28 02:30:52,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1058 Valid, 1934 Invalid, 2323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 2246 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-28 02:30:52,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89254 states. [2021-12-28 02:30:57,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89254 to 59032. [2021-12-28 02:30:57,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59032 states, 53372 states have (on average 1.5424005096305178) internal successors, (82321), 53629 states have internal predecessors, (82321), 3861 states have call successors, (3861), 1542 states have call predecessors, (3861), 1798 states have return successors, (10678), 4116 states have call predecessors, (10678), 3861 states have call successors, (10678) [2021-12-28 02:30:57,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59032 states to 59032 states and 96860 transitions. [2021-12-28 02:30:57,552 INFO L78 Accepts]: Start accepts. Automaton has 59032 states and 96860 transitions. Word has length 123 [2021-12-28 02:30:57,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 02:30:57,553 INFO L470 AbstractCegarLoop]: Abstraction has 59032 states and 96860 transitions. [2021-12-28 02:30:57,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:30:57,553 INFO L276 IsEmpty]: Start isEmpty. Operand 59032 states and 96860 transitions. [2021-12-28 02:30:57,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-28 02:30:57,593 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 02:30:57,593 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] [2021-12-28 02:30:57,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-28 02:30:57,594 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 02:30:57,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 02:30:57,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1554670212, now seen corresponding path program 1 times [2021-12-28 02:30:57,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 02:30:57,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520752435] [2021-12-28 02:30:57,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 02:30:57,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 02:30:57,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:57,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-28 02:30:57,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:57,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-28 02:30:57,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:57,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-28 02:30:57,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:57,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-12-28 02:30:57,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:57,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2021-12-28 02:30:57,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 02:30:57,714 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 02:30:57,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 02:30:57,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520752435] [2021-12-28 02:30:57,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520752435] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 02:30:57,714 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 02:30:57,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 02:30:57,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323166950] [2021-12-28 02:30:57,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 02:30:57,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 02:30:57,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 02:30:57,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 02:30:57,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 02:30:57,717 INFO L87 Difference]: Start difference. First operand 59032 states and 96860 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-28 02:31:04,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 02:31:04,409 INFO L93 Difference]: Finished difference Result 135568 states and 228101 transitions. [2021-12-28 02:31:04,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 02:31:04,409 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 5 states have internal predecessors, (113), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 123 [2021-12-28 02:31:04,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 02:31:04,786 INFO L225 Difference]: With dead ends: 135568 [2021-12-28 02:31:04,786 INFO L226 Difference]: Without dead ends: 76552 [2021-12-28 02:31:04,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-12-28 02:31:04,938 INFO L933 BasicCegarLoop]: 370 mSDtfsCounter, 839 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 854 SdHoareTripleChecker+Valid, 853 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-28 02:31:04,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [854 Valid, 853 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-28 02:31:05,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76552 states.