./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/systemc/token_ring.05.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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/systemc/token_ring.05.cil-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 16e147b68a860b93a665f8bd36a316225675cf186d50a72fc3242bc6ec552f78 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 14:52:44,339 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 14:52:44,341 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 14:52:44,390 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 14:52:44,390 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 14:52:44,391 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 14:52:44,392 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 14:52:44,393 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 14:52:44,394 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 14:52:44,394 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 14:52:44,395 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 14:52:44,396 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 14:52:44,397 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 14:52:44,400 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 14:52:44,401 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 14:52:44,402 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 14:52:44,404 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 14:52:44,405 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 14:52:44,406 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 14:52:44,408 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 14:52:44,412 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 14:52:44,412 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 14:52:44,413 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 14:52:44,414 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 14:52:44,415 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 14:52:44,415 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 14:52:44,415 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 14:52:44,416 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 14:52:44,416 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 14:52:44,417 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 14:52:44,417 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 14:52:44,417 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 14:52:44,418 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 14:52:44,418 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 14:52:44,419 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 14:52:44,419 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 14:52:44,420 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 14:52:44,420 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 14:52:44,420 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 14:52:44,421 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 14:52:44,421 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 14:52:44,424 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 14:52:44,441 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 14:52:44,446 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 14:52:44,447 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 14:52:44,447 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 14:52:44,447 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 14:52:44,448 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 14:52:44,448 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 14:52:44,448 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 14:52:44,448 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 14:52:44,448 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 14:52:44,449 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 14:52:44,449 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 14:52:44,449 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 14:52:44,450 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 14:52:44,450 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 14:52:44,450 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 14:52:44,450 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 14:52:44,450 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 14:52:44,450 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 14:52:44,450 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 14:52:44,451 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 14:52:44,451 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 14:52:44,451 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 14:52:44,451 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 14:52:44,451 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 14:52:44,451 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 14:52:44,451 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 14:52:44,452 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 14:52:44,452 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 14:52:44,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 14:52:44,453 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 14:52:44,453 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 14:52:44,453 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 14:52:44,453 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 14:52:44,453 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 16e147b68a860b93a665f8bd36a316225675cf186d50a72fc3242bc6ec552f78 [2021-12-14 14:52:44,620 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 14:52:44,633 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 14:52:44,635 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 14:52:44,635 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 14:52:44,636 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 14:52:44,636 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/token_ring.05.cil-2.c [2021-12-14 14:52:44,692 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2181d006c/6c77309719a040b597f12c7e7e9dc4f5/FLAG267a60273 [2021-12-14 14:52:45,003 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 14:52:45,003 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.05.cil-2.c [2021-12-14 14:52:45,011 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2181d006c/6c77309719a040b597f12c7e7e9dc4f5/FLAG267a60273 [2021-12-14 14:52:45,432 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2181d006c/6c77309719a040b597f12c7e7e9dc4f5 [2021-12-14 14:52:45,436 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 14:52:45,437 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 14:52:45,439 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 14:52:45,439 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 14:52:45,441 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 14:52:45,442 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:52:45" (1/1) ... [2021-12-14 14:52:45,443 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@765f8db7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:45, skipping insertion in model container [2021-12-14 14:52:45,444 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 02:52:45" (1/1) ... [2021-12-14 14:52:45,448 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 14:52:45,479 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 14:52:45,578 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/systemc/token_ring.05.cil-2.c[671,684] [2021-12-14 14:52:45,623 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 14:52:45,629 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 14:52:45,636 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/systemc/token_ring.05.cil-2.c[671,684] [2021-12-14 14:52:45,664 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 14:52:45,686 INFO L208 MainTranslator]: Completed translation [2021-12-14 14:52:45,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:45 WrapperNode [2021-12-14 14:52:45,690 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 14:52:45,691 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 14:52:45,691 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 14:52:45,692 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 14:52:45,696 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:45" (1/1) ... [2021-12-14 14:52:45,717 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:45" (1/1) ... [2021-12-14 14:52:45,746 INFO L137 Inliner]: procedures = 38, calls = 47, calls flagged for inlining = 21, calls inlined = 21, statements flattened = 452 [2021-12-14 14:52:45,746 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 14:52:45,747 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 14:52:45,747 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 14:52:45,747 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 14:52:45,753 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:45" (1/1) ... [2021-12-14 14:52:45,753 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:45" (1/1) ... [2021-12-14 14:52:45,755 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:45" (1/1) ... [2021-12-14 14:52:45,755 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:45" (1/1) ... [2021-12-14 14:52:45,759 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:45" (1/1) ... [2021-12-14 14:52:45,772 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:45" (1/1) ... [2021-12-14 14:52:45,774 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:45" (1/1) ... [2021-12-14 14:52:45,789 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 14:52:45,790 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 14:52:45,790 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 14:52:45,790 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 14:52:45,791 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:45" (1/1) ... [2021-12-14 14:52:45,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 14:52:45,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 14:52:45,822 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) [2021-12-14 14:52:45,823 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 [2021-12-14 14:52:45,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 14:52:45,858 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-12-14 14:52:45,858 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-12-14 14:52:45,859 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-12-14 14:52:45,859 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-12-14 14:52:45,859 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-12-14 14:52:45,859 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-12-14 14:52:45,861 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-12-14 14:52:45,861 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-12-14 14:52:45,861 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-12-14 14:52:45,861 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-12-14 14:52:45,861 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-12-14 14:52:45,861 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-12-14 14:52:45,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 14:52:45,862 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-12-14 14:52:45,862 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-12-14 14:52:45,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 14:52:45,862 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 14:52:45,931 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 14:52:45,932 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 14:52:46,226 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 14:52:46,231 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 14:52:46,232 INFO L301 CfgBuilder]: Removed 8 assume(true) statements. [2021-12-14 14:52:46,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:52:46 BoogieIcfgContainer [2021-12-14 14:52:46,233 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 14:52:46,234 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 14:52:46,234 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 14:52:46,245 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 14:52:46,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 02:52:45" (1/3) ... [2021-12-14 14:52:46,246 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a697284 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:52:46, skipping insertion in model container [2021-12-14 14:52:46,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 02:52:45" (2/3) ... [2021-12-14 14:52:46,246 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a697284 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 02:52:46, skipping insertion in model container [2021-12-14 14:52:46,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 02:52:46" (3/3) ... [2021-12-14 14:52:46,247 INFO L111 eAbstractionObserver]: Analyzing ICFG token_ring.05.cil-2.c [2021-12-14 14:52:46,250 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 14:52:46,250 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 14:52:46,291 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 14:52:46,295 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 [2021-12-14 14:52:46,295 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 14:52:46,309 INFO L276 IsEmpty]: Start isEmpty. Operand has 215 states, 185 states have (on average 1.6324324324324324) internal successors, (302), 189 states have internal predecessors, (302), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-12-14 14:52:46,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-14 14:52:46,316 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:52:46,317 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] [2021-12-14 14:52:46,317 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:52:46,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:52:46,321 INFO L85 PathProgramCache]: Analyzing trace with hash 2097421190, now seen corresponding path program 1 times [2021-12-14 14:52:46,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:52:46,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088896087] [2021-12-14 14:52:46,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:46,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:52:46,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:46,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:52:46,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:46,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 14:52:46,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:46,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-14 14:52:46,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:46,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-14 14:52:46,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:46,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 14:52:46,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:46,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:52:46,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:52:46,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088896087] [2021-12-14 14:52:46,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088896087] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:52:46,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:52:46,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-14 14:52:46,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293578664] [2021-12-14 14:52:46,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:52:46,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 14:52:46,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:52:46,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 14:52:46,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-14 14:52:46,704 INFO L87 Difference]: Start difference. First operand has 215 states, 185 states have (on average 1.6324324324324324) internal successors, (302), 189 states have internal predecessors, (302), 21 states have call successors, (21), 7 states have call predecessors, (21), 7 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:52:47,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:52:47,777 INFO L93 Difference]: Finished difference Result 749 states and 1221 transitions. [2021-12-14 14:52:47,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 14:52:47,779 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 101 [2021-12-14 14:52:47,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:52:47,789 INFO L225 Difference]: With dead ends: 749 [2021-12-14 14:52:47,790 INFO L226 Difference]: Without dead ends: 539 [2021-12-14 14:52:47,793 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 [2021-12-14 14:52:47,795 INFO L933 BasicCegarLoop]: 379 mSDtfsCounter, 769 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 957 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 781 SdHoareTripleChecker+Valid, 991 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-14 14:52:47,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [781 Valid, 991 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 957 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-14 14:52:47,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-12-14 14:52:47,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 408. [2021-12-14 14:52:47,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 359 states have (on average 1.5571030640668524) internal successors, (559), 362 states have internal predecessors, (559), 35 states have call successors, (35), 13 states have call predecessors, (35), 13 states have return successors, (36), 33 states have call predecessors, (36), 33 states have call successors, (36) [2021-12-14 14:52:47,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 630 transitions. [2021-12-14 14:52:47,850 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 630 transitions. Word has length 101 [2021-12-14 14:52:47,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:52:47,851 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 630 transitions. [2021-12-14 14:52:47,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 4 states have internal predecessors, (90), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:52:47,851 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 630 transitions. [2021-12-14 14:52:47,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-14 14:52:47,854 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:52:47,854 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] [2021-12-14 14:52:47,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 14:52:47,854 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:52:47,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:52:47,855 INFO L85 PathProgramCache]: Analyzing trace with hash 413606018, now seen corresponding path program 1 times [2021-12-14 14:52:47,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:52:47,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506010269] [2021-12-14 14:52:47,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:47,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:52:47,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:47,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:52:47,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:47,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 14:52:47,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:47,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-14 14:52:47,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:47,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-14 14:52:47,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:47,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 14:52:47,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:47,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:52:47,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:52:47,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506010269] [2021-12-14 14:52:47,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506010269] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:52:47,978 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:52:47,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 14:52:47,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825575573] [2021-12-14 14:52:47,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:52:47,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:52:47,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:52:47,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:52:47,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:52:47,980 INFO L87 Difference]: Start difference. First operand 408 states and 630 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:52:49,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:52:49,179 INFO L93 Difference]: Finished difference Result 1203 states and 1882 transitions. [2021-12-14 14:52:49,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 14:52:49,180 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 101 [2021-12-14 14:52:49,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:52:49,184 INFO L225 Difference]: With dead ends: 1203 [2021-12-14 14:52:49,184 INFO L226 Difference]: Without dead ends: 808 [2021-12-14 14:52:49,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 14:52:49,186 INFO L933 BasicCegarLoop]: 530 mSDtfsCounter, 764 mSDsluCounter, 1108 mSDsCounter, 0 mSdLazyCounter, 1511 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 776 SdHoareTripleChecker+Valid, 1638 SdHoareTripleChecker+Invalid, 1576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 14:52:49,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [776 Valid, 1638 Invalid, 1576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1511 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-14 14:52:49,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2021-12-14 14:52:49,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 594. [2021-12-14 14:52:49,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 524 states have (on average 1.549618320610687) internal successors, (812), 528 states have internal predecessors, (812), 49 states have call successors, (49), 19 states have call predecessors, (49), 20 states have return successors, (52), 48 states have call predecessors, (52), 47 states have call successors, (52) [2021-12-14 14:52:49,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 913 transitions. [2021-12-14 14:52:49,225 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 913 transitions. Word has length 101 [2021-12-14 14:52:49,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:52:49,226 INFO L470 AbstractCegarLoop]: Abstraction has 594 states and 913 transitions. [2021-12-14 14:52:49,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:52:49,226 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 913 transitions. [2021-12-14 14:52:49,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-14 14:52:49,229 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:52:49,229 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] [2021-12-14 14:52:49,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-14 14:52:49,229 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:52:49,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:52:49,230 INFO L85 PathProgramCache]: Analyzing trace with hash -2004878460, now seen corresponding path program 1 times [2021-12-14 14:52:49,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:52:49,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389117368] [2021-12-14 14:52:49,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:49,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:52:49,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:49,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:52:49,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:49,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 14:52:49,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:49,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-14 14:52:49,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:49,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-14 14:52:49,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:49,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 14:52:49,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:49,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:52:49,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:52:49,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389117368] [2021-12-14 14:52:49,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389117368] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:52:49,308 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:52:49,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 14:52:49,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261317740] [2021-12-14 14:52:49,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:52:49,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:52:49,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:52:49,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:52:49,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:52:49,310 INFO L87 Difference]: Start difference. First operand 594 states and 913 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:52:50,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:52:50,474 INFO L93 Difference]: Finished difference Result 1892 states and 2953 transitions. [2021-12-14 14:52:50,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 14:52:50,475 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 101 [2021-12-14 14:52:50,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:52:50,480 INFO L225 Difference]: With dead ends: 1892 [2021-12-14 14:52:50,480 INFO L226 Difference]: Without dead ends: 1311 [2021-12-14 14:52:50,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 14:52:50,482 INFO L933 BasicCegarLoop]: 522 mSDtfsCounter, 761 mSDsluCounter, 1104 mSDsCounter, 0 mSdLazyCounter, 1517 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 773 SdHoareTripleChecker+Valid, 1626 SdHoareTripleChecker+Invalid, 1585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 14:52:50,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [773 Valid, 1626 Invalid, 1585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1517 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-14 14:52:50,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2021-12-14 14:52:50,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 967. [2021-12-14 14:52:50,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 967 states, 855 states have (on average 1.5426900584795322) internal successors, (1319), 861 states have internal predecessors, (1319), 77 states have call successors, (77), 31 states have call predecessors, (77), 34 states have return successors, (88), 78 states have call predecessors, (88), 75 states have call successors, (88) [2021-12-14 14:52:50,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 1484 transitions. [2021-12-14 14:52:50,529 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 1484 transitions. Word has length 101 [2021-12-14 14:52:50,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:52:50,529 INFO L470 AbstractCegarLoop]: Abstraction has 967 states and 1484 transitions. [2021-12-14 14:52:50,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:52:50,530 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 1484 transitions. [2021-12-14 14:52:50,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-14 14:52:50,532 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:52:50,532 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] [2021-12-14 14:52:50,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 14:52:50,532 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:52:50,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:52:50,533 INFO L85 PathProgramCache]: Analyzing trace with hash 410957890, now seen corresponding path program 1 times [2021-12-14 14:52:50,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:52:50,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541395140] [2021-12-14 14:52:50,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:50,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:52:50,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:50,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:52:50,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:50,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 14:52:50,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:50,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-14 14:52:50,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:50,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-14 14:52:50,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:50,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 14:52:50,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:50,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:52:50,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:52:50,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541395140] [2021-12-14 14:52:50,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541395140] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:52:50,621 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:52:50,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 14:52:50,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329451052] [2021-12-14 14:52:50,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:52:50,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:52:50,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:52:50,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:52:50,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:52:50,623 INFO L87 Difference]: Start difference. First operand 967 states and 1484 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:52:51,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:52:51,778 INFO L93 Difference]: Finished difference Result 3221 states and 5012 transitions. [2021-12-14 14:52:51,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 14:52:51,779 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 101 [2021-12-14 14:52:51,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:52:51,787 INFO L225 Difference]: With dead ends: 3221 [2021-12-14 14:52:51,788 INFO L226 Difference]: Without dead ends: 2267 [2021-12-14 14:52:51,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 14:52:51,799 INFO L933 BasicCegarLoop]: 518 mSDtfsCounter, 757 mSDsluCounter, 1104 mSDsCounter, 0 mSdLazyCounter, 1512 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 769 SdHoareTripleChecker+Valid, 1622 SdHoareTripleChecker+Invalid, 1580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 14:52:51,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [769 Valid, 1622 Invalid, 1580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1512 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-14 14:52:51,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2267 states. [2021-12-14 14:52:51,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2267 to 1714. [2021-12-14 14:52:51,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1714 states, 1518 states have (on average 1.5368906455862978) internal successors, (2333), 1528 states have internal predecessors, (2333), 133 states have call successors, (133), 55 states have call predecessors, (133), 62 states have return successors, (166), 138 states have call predecessors, (166), 131 states have call successors, (166) [2021-12-14 14:52:51,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1714 states to 1714 states and 2632 transitions. [2021-12-14 14:52:51,879 INFO L78 Accepts]: Start accepts. Automaton has 1714 states and 2632 transitions. Word has length 101 [2021-12-14 14:52:51,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:52:51,879 INFO L470 AbstractCegarLoop]: Abstraction has 1714 states and 2632 transitions. [2021-12-14 14:52:51,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:52:51,883 INFO L276 IsEmpty]: Start isEmpty. Operand 1714 states and 2632 transitions. [2021-12-14 14:52:51,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-14 14:52:51,885 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:52:51,885 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] [2021-12-14 14:52:51,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 14:52:51,885 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:52:51,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:52:51,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1735814084, now seen corresponding path program 1 times [2021-12-14 14:52:51,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:52:51,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127209107] [2021-12-14 14:52:51,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:51,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:52:51,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:51,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:52:51,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:51,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 14:52:51,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:51,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-14 14:52:51,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:51,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-14 14:52:51,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:51,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 14:52:51,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:51,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:52:51,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:52:51,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127209107] [2021-12-14 14:52:51,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127209107] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:52:51,980 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:52:51,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 14:52:51,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485810567] [2021-12-14 14:52:51,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:52:51,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:52:51,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:52:51,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:52:51,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:52:51,983 INFO L87 Difference]: Start difference. First operand 1714 states and 2632 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:52:53,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:52:53,204 INFO L93 Difference]: Finished difference Result 5878 states and 9146 transitions. [2021-12-14 14:52:53,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-14 14:52:53,205 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 101 [2021-12-14 14:52:53,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:52:53,220 INFO L225 Difference]: With dead ends: 5878 [2021-12-14 14:52:53,220 INFO L226 Difference]: Without dead ends: 4177 [2021-12-14 14:52:53,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-12-14 14:52:53,227 INFO L933 BasicCegarLoop]: 512 mSDtfsCounter, 756 mSDsluCounter, 1104 mSDsCounter, 0 mSdLazyCounter, 1504 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 768 SdHoareTripleChecker+Valid, 1616 SdHoareTripleChecker+Invalid, 1575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 14:52:53,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [768 Valid, 1616 Invalid, 1575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1504 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-14 14:52:53,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4177 states. [2021-12-14 14:52:53,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4177 to 3213. [2021-12-14 14:52:53,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3213 states, 2849 states have (on average 1.5328185328185329) internal successors, (4367), 2867 states have internal predecessors, (4367), 245 states have call successors, (245), 103 states have call predecessors, (245), 118 states have return successors, (340), 258 states have call predecessors, (340), 243 states have call successors, (340) [2021-12-14 14:52:53,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3213 states to 3213 states and 4952 transitions. [2021-12-14 14:52:53,348 INFO L78 Accepts]: Start accepts. Automaton has 3213 states and 4952 transitions. Word has length 101 [2021-12-14 14:52:53,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:52:53,349 INFO L470 AbstractCegarLoop]: Abstraction has 3213 states and 4952 transitions. [2021-12-14 14:52:53,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:52:53,349 INFO L276 IsEmpty]: Start isEmpty. Operand 3213 states and 4952 transitions. [2021-12-14 14:52:53,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-14 14:52:53,352 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:52:53,352 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] [2021-12-14 14:52:53,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-14 14:52:53,352 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:52:53,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:52:53,353 INFO L85 PathProgramCache]: Analyzing trace with hash -992395262, now seen corresponding path program 1 times [2021-12-14 14:52:53,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:52:53,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55641020] [2021-12-14 14:52:53,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:53,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:52:53,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:53,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:52:53,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:53,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 14:52:53,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:53,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-14 14:52:53,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:53,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-14 14:52:53,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:53,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 14:52:53,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:53,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:52:53,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:52:53,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55641020] [2021-12-14 14:52:53,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55641020] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:52:53,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:52:53,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 14:52:53,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439524305] [2021-12-14 14:52:53,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:52:53,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:52:53,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:52:53,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:52:53,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:52:53,439 INFO L87 Difference]: Start difference. First operand 3213 states and 4952 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:52:54,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:52:54,749 INFO L93 Difference]: Finished difference Result 12440 states and 19334 transitions. [2021-12-14 14:52:54,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 14:52:54,750 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 101 [2021-12-14 14:52:54,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:52:54,787 INFO L225 Difference]: With dead ends: 12440 [2021-12-14 14:52:54,787 INFO L226 Difference]: Without dead ends: 9240 [2021-12-14 14:52:54,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 14:52:54,799 INFO L933 BasicCegarLoop]: 374 mSDtfsCounter, 1023 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 1313 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1041 SdHoareTripleChecker+Valid, 1119 SdHoareTripleChecker+Invalid, 1414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 14:52:54,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1041 Valid, 1119 Invalid, 1414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1313 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-14 14:52:54,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9240 states. [2021-12-14 14:52:55,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9240 to 6193. [2021-12-14 14:52:55,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6193 states, 5509 states have (on average 1.534761299691414) internal successors, (8455), 5543 states have internal predecessors, (8455), 453 states have call successors, (453), 199 states have call predecessors, (453), 230 states have return successors, (726), 482 states have call predecessors, (726), 451 states have call successors, (726) [2021-12-14 14:52:55,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6193 states to 6193 states and 9634 transitions. [2021-12-14 14:52:55,105 INFO L78 Accepts]: Start accepts. Automaton has 6193 states and 9634 transitions. Word has length 101 [2021-12-14 14:52:55,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:52:55,106 INFO L470 AbstractCegarLoop]: Abstraction has 6193 states and 9634 transitions. [2021-12-14 14:52:55,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:52:55,106 INFO L276 IsEmpty]: Start isEmpty. Operand 6193 states and 9634 transitions. [2021-12-14 14:52:55,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-14 14:52:55,113 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:52:55,113 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] [2021-12-14 14:52:55,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 14:52:55,113 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:52:55,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:52:55,114 INFO L85 PathProgramCache]: Analyzing trace with hash -2134897728, now seen corresponding path program 1 times [2021-12-14 14:52:55,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:52:55,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720401576] [2021-12-14 14:52:55,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:55,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:52:55,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:55,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:52:55,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:55,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 14:52:55,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:55,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-14 14:52:55,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:55,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-14 14:52:55,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:55,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 14:52:55,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:55,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:52:55,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:52:55,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720401576] [2021-12-14 14:52:55,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720401576] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:52:55,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:52:55,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 14:52:55,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431739483] [2021-12-14 14:52:55,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:52:55,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:52:55,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:52:55,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:52:55,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:52:55,200 INFO L87 Difference]: Start difference. First operand 6193 states and 9634 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:52:56,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:52:56,940 INFO L93 Difference]: Finished difference Result 23806 states and 37274 transitions. [2021-12-14 14:52:56,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 14:52:56,941 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 101 [2021-12-14 14:52:56,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:52:57,022 INFO L225 Difference]: With dead ends: 23806 [2021-12-14 14:52:57,022 INFO L226 Difference]: Without dead ends: 17626 [2021-12-14 14:52:57,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 14:52:57,048 INFO L933 BasicCegarLoop]: 572 mSDtfsCounter, 792 mSDsluCounter, 1093 mSDsCounter, 0 mSdLazyCounter, 1702 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 803 SdHoareTripleChecker+Valid, 1665 SdHoareTripleChecker+Invalid, 1776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-14 14:52:57,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [803 Valid, 1665 Invalid, 1776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1702 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-14 14:52:57,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17626 states. [2021-12-14 14:52:57,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17626 to 11814. [2021-12-14 14:52:57,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11814 states, 10506 states have (on average 1.529126213592233) internal successors, (16065), 10572 states have internal predecessors, (16065), 853 states have call successors, (853), 391 states have call predecessors, (853), 454 states have return successors, (1644), 914 states have call predecessors, (1644), 851 states have call successors, (1644) [2021-12-14 14:52:57,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11814 states to 11814 states and 18562 transitions. [2021-12-14 14:52:57,551 INFO L78 Accepts]: Start accepts. Automaton has 11814 states and 18562 transitions. Word has length 101 [2021-12-14 14:52:57,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:52:57,553 INFO L470 AbstractCegarLoop]: Abstraction has 11814 states and 18562 transitions. [2021-12-14 14:52:57,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:52:57,554 INFO L276 IsEmpty]: Start isEmpty. Operand 11814 states and 18562 transitions. [2021-12-14 14:52:57,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-14 14:52:57,561 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:52:57,561 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] [2021-12-14 14:52:57,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-14 14:52:57,562 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:52:57,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:52:57,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1894657982, now seen corresponding path program 1 times [2021-12-14 14:52:57,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:52:57,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363434910] [2021-12-14 14:52:57,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:52:57,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:52:57,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:57,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:52:57,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:57,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 14:52:57,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:57,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-14 14:52:57,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:57,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-14 14:52:57,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:57,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 14:52:57,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:52:57,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:52:57,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:52:57,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363434910] [2021-12-14 14:52:57,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363434910] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:52:57,634 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:52:57,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 14:52:57,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531152964] [2021-12-14 14:52:57,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:52:57,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:52:57,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:52:57,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:52:57,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:52:57,635 INFO L87 Difference]: Start difference. First operand 11814 states and 18562 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:52:59,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:52:59,809 INFO L93 Difference]: Finished difference Result 44985 states and 71096 transitions. [2021-12-14 14:52:59,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 14:52:59,809 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 101 [2021-12-14 14:52:59,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:52:59,913 INFO L225 Difference]: With dead ends: 44985 [2021-12-14 14:52:59,913 INFO L226 Difference]: Without dead ends: 33184 [2021-12-14 14:52:59,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 14:52:59,955 INFO L933 BasicCegarLoop]: 492 mSDtfsCounter, 884 mSDsluCounter, 1096 mSDsCounter, 0 mSdLazyCounter, 1461 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 902 SdHoareTripleChecker+Valid, 1588 SdHoareTripleChecker+Invalid, 1538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-14 14:52:59,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [902 Valid, 1588 Invalid, 1538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1461 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-14 14:52:59,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33184 states. [2021-12-14 14:53:00,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33184 to 23343. [2021-12-14 14:53:00,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23343 states, 20819 states have (on average 1.5318218934627024) internal successors, (31891), 20949 states have internal predecessors, (31891), 1621 states have call successors, (1621), 775 states have call predecessors, (1621), 902 states have return successors, (3934), 1746 states have call predecessors, (3934), 1619 states have call successors, (3934) [2021-12-14 14:53:01,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23343 states to 23343 states and 37446 transitions. [2021-12-14 14:53:01,004 INFO L78 Accepts]: Start accepts. Automaton has 23343 states and 37446 transitions. Word has length 101 [2021-12-14 14:53:01,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:53:01,005 INFO L470 AbstractCegarLoop]: Abstraction has 23343 states and 37446 transitions. [2021-12-14 14:53:01,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:01,005 INFO L276 IsEmpty]: Start isEmpty. Operand 23343 states and 37446 transitions. [2021-12-14 14:53:01,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-14 14:53:01,020 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:53:01,020 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] [2021-12-14 14:53:01,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 14:53:01,020 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:53:01,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:53:01,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1055624320, now seen corresponding path program 1 times [2021-12-14 14:53:01,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:53:01,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034242760] [2021-12-14 14:53:01,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:53:01,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:53:01,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:01,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:53:01,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:01,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 14:53:01,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:01,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-14 14:53:01,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:01,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-14 14:53:01,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:01,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 14:53:01,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:01,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:53:01,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:53:01,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034242760] [2021-12-14 14:53:01,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034242760] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:53:01,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:53:01,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 14:53:01,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919058837] [2021-12-14 14:53:01,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:53:01,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:53:01,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:53:01,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:53:01,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:53:01,112 INFO L87 Difference]: Start difference. First operand 23343 states and 37446 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:04,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:53:04,283 INFO L93 Difference]: Finished difference Result 87056 states and 140462 transitions. [2021-12-14 14:53:04,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 14:53:04,283 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 101 [2021-12-14 14:53:04,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:53:04,474 INFO L225 Difference]: With dead ends: 87056 [2021-12-14 14:53:04,475 INFO L226 Difference]: Without dead ends: 63726 [2021-12-14 14:53:04,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 14:53:04,535 INFO L933 BasicCegarLoop]: 487 mSDtfsCounter, 844 mSDsluCounter, 1096 mSDsCounter, 0 mSdLazyCounter, 1453 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 862 SdHoareTripleChecker+Valid, 1583 SdHoareTripleChecker+Invalid, 1530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 14:53:04,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [862 Valid, 1583 Invalid, 1530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1453 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-14 14:53:04,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63726 states. [2021-12-14 14:53:06,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63726 to 46336. [2021-12-14 14:53:06,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46336 states, 41444 states have (on average 1.5347215519737476) internal successors, (63605), 41702 states have internal predecessors, (63605), 3093 states have call successors, (3093), 1543 states have call predecessors, (3093), 1798 states have return successors, (9908), 3346 states have call predecessors, (9908), 3091 states have call successors, (9908) [2021-12-14 14:53:06,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46336 states to 46336 states and 76606 transitions. [2021-12-14 14:53:06,824 INFO L78 Accepts]: Start accepts. Automaton has 46336 states and 76606 transitions. Word has length 101 [2021-12-14 14:53:06,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:53:06,824 INFO L470 AbstractCegarLoop]: Abstraction has 46336 states and 76606 transitions. [2021-12-14 14:53:06,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:06,824 INFO L276 IsEmpty]: Start isEmpty. Operand 46336 states and 76606 transitions. [2021-12-14 14:53:06,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-14 14:53:06,852 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:53:06,853 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] [2021-12-14 14:53:06,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-14 14:53:06,853 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:53:06,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:53:06,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1028558718, now seen corresponding path program 1 times [2021-12-14 14:53:06,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:53:06,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717347104] [2021-12-14 14:53:06,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:53:06,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:53:06,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:06,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:53:06,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:06,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 14:53:06,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:06,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-14 14:53:06,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:06,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-14 14:53:06,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:06,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 14:53:06,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:06,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:53:06,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:53:06,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717347104] [2021-12-14 14:53:06,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717347104] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:53:06,927 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:53:06,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 14:53:06,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099593581] [2021-12-14 14:53:06,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:53:06,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:53:06,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:53:06,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:53:06,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:53:06,928 INFO L87 Difference]: Start difference. First operand 46336 states and 76606 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:12,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:53:12,303 INFO L93 Difference]: Finished difference Result 168831 states and 281252 transitions. [2021-12-14 14:53:12,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 14:53:12,304 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 101 [2021-12-14 14:53:12,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:53:12,816 INFO L225 Difference]: With dead ends: 168831 [2021-12-14 14:53:12,816 INFO L226 Difference]: Without dead ends: 122508 [2021-12-14 14:53:12,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 14:53:12,945 INFO L933 BasicCegarLoop]: 510 mSDtfsCounter, 760 mSDsluCounter, 1096 mSDsCounter, 0 mSdLazyCounter, 1574 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 771 SdHoareTripleChecker+Valid, 1606 SdHoareTripleChecker+Invalid, 1648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-14 14:53:12,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [771 Valid, 1606 Invalid, 1648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1574 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-14 14:53:13,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122508 states. [2021-12-14 14:53:16,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122508 to 92193. [2021-12-14 14:53:17,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92193 states, 82693 states have (on average 1.537723870218761) internal successors, (127159), 83207 states have internal predecessors, (127159), 5909 states have call successors, (5909), 3079 states have call predecessors, (5909), 3590 states have return successors, (26102), 6418 states have call predecessors, (26102), 5907 states have call successors, (26102) [2021-12-14 14:53:17,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92193 states to 92193 states and 159170 transitions. [2021-12-14 14:53:17,692 INFO L78 Accepts]: Start accepts. Automaton has 92193 states and 159170 transitions. Word has length 101 [2021-12-14 14:53:17,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 14:53:17,692 INFO L470 AbstractCegarLoop]: Abstraction has 92193 states and 159170 transitions. [2021-12-14 14:53:17,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:17,693 INFO L276 IsEmpty]: Start isEmpty. Operand 92193 states and 159170 transitions. [2021-12-14 14:53:17,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-14 14:53:17,745 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 14:53:17,745 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] [2021-12-14 14:53:17,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-14 14:53:17,746 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 14:53:17,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 14:53:17,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1189071680, now seen corresponding path program 1 times [2021-12-14 14:53:17,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 14:53:17,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545782498] [2021-12-14 14:53:17,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 14:53:17,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 14:53:17,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:17,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-14 14:53:17,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:17,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-12-14 14:53:17,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:17,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-14 14:53:17,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:17,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2021-12-14 14:53:17,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:17,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-12-14 14:53:17,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 14:53:17,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 14:53:17,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 14:53:17,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545782498] [2021-12-14 14:53:17,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545782498] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 14:53:17,813 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 14:53:17,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 14:53:17,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633749902] [2021-12-14 14:53:17,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 14:53:17,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 14:53:17,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 14:53:17,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 14:53:17,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 14:53:17,815 INFO L87 Difference]: Start difference. First operand 92193 states and 159170 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-14 14:53:27,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 14:53:27,571 INFO L93 Difference]: Finished difference Result 327502 states and 572634 transitions. [2021-12-14 14:53:27,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 14:53:27,573 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 5 states have internal predecessors, (90), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 101 [2021-12-14 14:53:27,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 14:53:28,769 INFO L225 Difference]: With dead ends: 327502 [2021-12-14 14:53:28,769 INFO L226 Difference]: Without dead ends: 235322 [2021-12-14 14:53:29,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-14 14:53:29,107 INFO L933 BasicCegarLoop]: 471 mSDtfsCounter, 764 mSDsluCounter, 1081 mSDsCounter, 0 mSdLazyCounter, 1426 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 782 SdHoareTripleChecker+Valid, 1552 SdHoareTripleChecker+Invalid, 1507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-14 14:53:29,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [782 Valid, 1552 Invalid, 1507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1426 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-14 14:53:29,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235322 states.